不二越　マテリアル事業部 List of Products and Services

Do you have any development or design, or procurement personnel who have the following requests: 'I want to develop new products with new materials,' 'I want to improve product performance and differentiate from other companies,' 'I want to add new functions to product materials'? At the Nisshinbo Material Division, we leverage our experience in manufacturing functional materials to add new functions to special steel according to user requests. We provide special steel with 'customer-specific' component design. This document summarizes our past achievements, facilities, and the characteristics of special steel. It also includes the process from consultation to delivery, so please take a look. [Delivery Achievements (Partial)] Industrial blades: Corrosion-resistant high-hardness stainless steel Machine blades: High-speed tool steel Furnace materials: Resistance heating elements Valve materials: Martensitic stainless steel Environmental equipment manufacturers: Ni-Cr-Fe alloys For more details, please contact us or download the catalog.

• Special Steel

The "EXEO-CR20" is a martensitic stainless steel that achieves both high hardness and high corrosion resistance through its unique component design and dissolution technology. In our in-house tests, we confirmed a high hardness of around 60 HRC and a tensile strength exceeding 2 GPa. Additionally, it has achieved wear resistance equivalent to SUS440C and corrosion resistance greater than SUS420J2. It also excels in fatigue strength and has excellent workability. Leveraging its features, it can be utilized in various fields such as medical instruments and mold materials for shaping powders into tablets. 【Potential application areas】 ■ Food and pharmaceutical industries where corrosion resistance is required ■ Cutting tools and medical instruments that require high hardness ■ Automotive parts and semiconductor-related applications ★ We are currently offering materials that introduce performance test data and application examples. Additionally, you can also view our basic knowledge document on stainless steel titled "Types of High-Performance Stainless Steel." ★ Samples are also available. Please refer to the basic information section below for sizes and other details. If you are interested, please apply through the "Contact Us" section.

• stainless

The "EXEO-CR20" is an original steel developed by our company that has a hardness equivalent to "SUS440C" (60HRC) and offers more than three times the corrosion resistance. Compared to SUS440C, it improves machinability by two times and grindability by 2.5 times, allowing for reductions in manufacturing time and finishing processes. Improvements in rust resistance, the omission of hard chrome plating for parts and products, reductions in plating processes, shortened delivery times, and reduced plating costs are expected. 【Features】 ■ A material that is 2 to 3 times more corrosion-resistant than the traditionally used SUS440C ■ Impact and bending strength, toughness are more than twice that of SUS440C ■ Wear resistance is over three times greater (according to our research) compared to the popular SUS420J2 ■ Achieves top-class tensile strength of 2200MPa through quenching and tempering ★ For engineers and designers considering a change in material type for performance improvement or new product development, we can provide free sample evaluation if you are interested in trying it out. ★ Please consult us regarding billets, round steel, flat steel, coil wire, polished wire, steel plates, irregular shapes, and quenching and tempering wire. * For more details, please refer to the PDF materials or feel free to contact us.

• stainless

The "EXEO-CR20" is a stainless steel material original to Fujikoshi, possessing hardness equivalent to SUS440C and more than three times the corrosion resistance. Through quenching heat treatment, it exhibits a tensile strength of 2200 MPa. It can be applied to tightening tools such as spanners and socket wrenches. We encourage designers and users who have concerns about rust and strength enhancement to consider this material. 【Features】 ■ Proven performance for high corrosion-resistant and high-strength parts used in critical automotive components and mixed methanol injection nozzle parts. ■ Can be used as an alternative material for tools and parts that quickly lose chrome plating and rust, such as SCM and others. ■ Applicable to tightening tools like spanners and socket wrenches, as well as pliers and nippers. ★ We provide documents introducing performance test data and application examples. Additionally, you can also view the basic knowledge document on stainless steel titled "Types of High-Performance Stainless Steel." ★ Please consult us for billets, round steel, flat steel, coil wire, polished wire, steel plates, irregular shapes, and quenched and tempered wire. * For more details, please refer to the PDF document or feel free to contact us.

• stainless

The "EXEO-CR20" is an original stainless steel material from Fujikoshi that exhibits a tensile strength of 2200 MPa due to quenching heat treatment. It is suitable for wear-resistant parts and cutting tools that are sensitive to rust caused by alkaline and acidic cleaning agents in food processing equipment. Recommended for engineers and designers of industrial machinery and parts who have concerns about rust and strength enhancement. 【Features】 ■ Recommended for medical tools, tools that dislike stress corrosion cracking, rust, and wear during cleaning, and parts for food equipment. ■ Applicable to wear-resistant parts and cutting tools that are sensitive to rust caused by alkaline and acidic cleaning agents in food processing equipment. ■ Suitable as a material for tools and parts where the strength of general-purpose SUS304, SUS420J2, SUS630, etc., is insufficient. ★ We provide materials that introduce performance test data and application examples. Additionally, you can also view the basic knowledge document on stainless steel titled "Types of High-Performance Stainless Steel." ★ Please consult us regarding billets, round bars, flat bars, coil wires, polished wires, steel plates, irregular shapes, and quenched and tempered wire. * For more details, please refer to the PDF document or feel free to contact us.

• stainless

The "EXEO-CR20" is an original stainless steel material from Fujikoshi that has more than twice the toughness compared to SUS440C. Among stainless steels, it is a very hard martensitic stainless steel with hardness equivalent to SUS440C (60HRC) and has more than three times the corrosion resistance. It can be used for parts such as bolts, screw components, pins, and measuring gauges that require wear resistance and high strength. 【Features】 ■ Proven performance in parts that dislike rust and wear in semiconductor and vacuum equipment where rust-preventive oil is undesirable. ■ Applicable to device parts in optical-related equipment and mirror holders that require wear resistance. ■ Usable for parts such as bolts, screw components, pins, and measuring gauges that require wear resistance and high strength. ★ We offer materials that introduce performance test data and application examples. Additionally, you can also view the basic knowledge document on stainless steel titled "Types of High-Performance Stainless Steel." ★ Please consult us regarding billets, round bars, flat bars, coil wires, polished wires, steel plates, irregular shapes, and heat-treated wire. * For more details, please refer to the PDF document or feel free to contact us.

• stainless

The "EXEO-CR20" is an original stainless steel material from Nikkoshi that has over three times the corrosion resistance compared to SUS440C. In terms of impact and bending strength, it exhibits more than twice the performance of SUS440C, achieving a tensile strength of 2200 MPa through quenching heat treatment. It has a proven track record for sliding parts that are sensitive to rust and wear in atmospheric conditions, such as rotating components and linear motion rails. 【Features】 ■ Proven track record for sliding parts that are sensitive to rust and wear in atmospheric conditions, such as rotating components and linear motion rails. ■ Can serve as a substitute for parts like SUJ2 and SCM that quickly lose their chrome plating and rust. ■ Well-suited for applications in bearing balls, outer and inner rings, and actuator rail components. ★ We provide materials that introduce performance test data and application examples. Additionally, you can also view the foundational knowledge document on stainless steel titled "Types of High-Performance Stainless Steel." ★ Please consult us regarding billets, round steel, flat steel, coil wire, polished wire, steel plates, irregular shapes, and heat-treated wire. *For more details, please refer to the PDF document or feel free to contact us.

• stainless

The "EXEO-CR20" is a rust-resistant, hard stainless steel material developed by Fujikoshi, which undergoes hardening heat treatment. Compared to SUS440C, it offers twice the machinability and 2.5 times the grindability, allowing for a reduction in manufacturing time and finishing processes. It can be used as a substitute for parts that quickly lose their chrome plating and rust when chrome-plated, such as SCM and others. 【Features】 ■ Proven performance in fixed tools and rotating parts that are sensitive to rust and wear, such as vices and chucks. ■ Can be used as a substitute for parts that quickly lose their chrome plating and rust when chrome-plated, such as SCM and others. ■ Also applicable to tightening tools like spanners and socket wrenches, as well as pliers and nippers. ★ We provide materials that introduce performance test data and application examples. Additionally, you can also view the basic knowledge document on stainless steel titled "Types of High-Performance Stainless Steel." ★ Please consult us for billets, round steel, flat and square steel, coil wire, polished wire, steel plates, irregular shapes, and heat-treated wire. *For more details, please refer to the PDF document or feel free to contact us.

• stainless

The "EXEO-CR20" is a martensitic stainless steel that achieves both high hardness and high corrosion resistance through its unique component design and dissolution technology. In our in-house tests, we confirmed a high hardness of around 60 HRC and a tensile strength exceeding 2 GPa. Additionally, it has achieved wear resistance equivalent to SUS440C and corrosion resistance greater than SUS420J2. It suppresses coarse carbides, excels in fatigue strength, and also has good grindability, contributing to reduced processing time. 【Features】 ■ Realizes the refinement of carbides and reduction of non-metallic inclusions ■ Applicable to parts requiring corrosion resistance and high hardness, such as fuel injection system components, rotating and sliding parts, cutting tools, and medical instruments. ★ Samples are currently available! If you wish to receive one, please apply through the "Contact Us" section. Additionally, you can view the available stock and other details by clicking the download button for the "Sample Stock List & Manufacturing Capabilities."

• stainless

The "EXEO-CR20" is a martensitic stainless steel that achieves both high hardness and high corrosion resistance through its unique component design and dissolution technology. In our in-house tests, we confirmed a high hardness of around 60 HRC and a tensile strength exceeding 2 GPa. Additionally, it possesses corrosion resistance equivalent to that of SUS630 or higher. It suppresses coarse carbides, excels in fatigue strength, and also offers good grindability, contributing to reduced processing time. 【Features】 ■ Achieves fine carbide formation and reduction of non-metallic inclusions ■ Applicable to parts requiring corrosion resistance and high hardness, such as fuel injection device components, rotating and sliding parts, cutting tools, and medical instruments. ★ We are currently offering materials that introduce performance test data and application examples. Additionally, you can also view our basic knowledge document on stainless steel titled "Types of High-Performance Stainless Steel." ★ Samples are also available. Please refer to the basic information section below for sizes and other details. If you are interested, please apply through the "Contact Us" section.

• stainless

The "EXEO-CR20" is a martensitic stainless steel that achieves both high hardness and high corrosion resistance through its unique component design and dissolution technology. In our in-house tests, we confirmed a high hardness of around 60 HRC and a tensile strength exceeding 2 GPa. Additionally, it has achieved wear resistance equivalent to SUS440C and corrosion resistance greater than SUS420J2. It suppresses coarse carbides, excels in fatigue strength, and also has good grindability, contributing to reduced processing time. 【Features】 ■ Realizes the refinement of carbides and reduction of non-metallic inclusions ■ Applicable to parts requiring corrosion resistance and high hardness, such as fuel injection system components, rotating and sliding parts, cutting tools, and medical instruments. ★ We are currently offering materials that introduce performance test data and application examples. Additionally, you can also view the basic knowledge document on stainless steel titled "Types of High-Performance Stainless Steel." ★ Samples are also available. Please refer to the basic information section below for sizes and other details. If you are interested, please apply through the "Contact Us" section.

• stainless

This document provides an introduction to stainless steel, covering its history, mechanisms, types, and characteristics over a total of 29 pages, as well as guidance on how to choose stainless steel. Additionally, it introduces high-performance stainless steel products, such as our original product "EXEO-CR20," which combines strength and corrosion resistance. We are currently publishing product examples and corrosion resistance test results. The document is a must-read for anyone interested in stainless steel, detailing factors that contribute to its rust resistance and the advantages and disadvantages of different materials. [Contents (excerpt)] ■ What is stainless steel ■ Mechanisms of stainless steel ■ Types and characteristics of stainless steel ■ Introduction to Fujikoshi stainless steel Others We also provide samples of the stainless steel we handle. [Available "EXEO-CR20" samples] Round steel: Φ13–200 Flat steel: 36x365xL Steel plates: 0.6–3.0mm Please consult us regarding the required lengths. We will consider other requests as well. Furthermore, we offer heat treatment and technical support. *For more details, please refer to the PDF document or feel free to contact us.

• Special Steel

This document introduces 'EXEO-CR20', which combines a high hardness level of 60HRC with corrosion resistance exceeding that of SUS420J2. It includes features, chemical composition, heat treatment, corrosion resistance, and mechanical properties. Additionally, examples of turning, milling, and cutting tap processing conditions are also provided. [Contents (excerpt)] ■Features ■Chemical composition ■Heat treatment ■Corrosion resistance ■Mechanical properties *For more details, please refer to the PDF document or feel free to contact us.

• Special Steel

Fujikoshi Co., Ltd. handles "high carbon chromium bearing steel." It can be used for shaft gauge rolls and large bearings. As a comprehensive machinery manufacturer that offers everything from materials to parts and machine tools, we contribute to the development of the manufacturing world with a variety of solutions. 【Characteristics】 ■SUJ2: Excellent wear resistance and dimensional stability ■SUJ3: Good hardenability *For more details, please refer to the external link page or feel free to contact us.

• Special Steel

"ICS22" is an alloy tool steel with excellent hardenability and suitability for vacuum hardening. When the hardness of the material is below HB171 and it is hobbed, it is less likely to develop cracks. In cases of small or large-scale production or low load, it is used for items such as eyeglass frames, watches, and coins, where cold hobbing is followed by tempering. [Features] ■ Excellent hardenability ■ Suitable for vacuum hardening ■ Less likely to develop cracks when hobbed (material hardness below HB171) *For more details, please refer to the external link page or feel free to contact us.

• Special Steel

"MCR1" is an alloy tool steel from the 8Cr series designed for cold work, which improves the toughness, grindability, and softening resistance of SKD11. It can be used for punches, trimming dies, screw rolling dies, cold heading dies, and cold work tool steels that require toughness and wear resistance. As a comprehensive machinery manufacturer that offers everything from materials to parts and machine tools, we contribute to the advancement of the manufacturing world with a variety of solutions. 【Features】 ■ Excellent wear resistance due to the distribution of hard MC carbides ■ High toughness steel with adjusted carbide grain size ■ Improved toughness, grindability, and softening resistance compared to SKD11 ■ Usable for punches, trimming dies, and more *For more details, please refer to the external link page or feel free to contact us.

• Special Steel

"HS97R" is a high-performance high-speed tool steel that excels in chip resistance, wear resistance, and hardenability. It improves the stability of quality during vacuum hardening and reduces early chipping of the cutting edge. It can be used for industrial cutting tools and primary cutting tools that require high hardness and sharp cutting edges. 【Features】 ■ Excellent chip resistance, wear resistance, and hardenability ■ Improved stability of quality during vacuum hardening and reduced early chipping of the cutting edge ■ Usable for industrial cutting tools and primary cutting tools *For more details, please refer to the external link page or feel free to contact us.

• Special Steel

"HS53M" is a Co-based high-speed tool steel with excellent wear resistance. It has low crater wear and high cutting performance, making it suitable for use in hobs, broaches, punches, and screw rolling dies. As a comprehensive machine manufacturer that offers everything from materials to parts and machine tools, we contribute to the development of the manufacturing world with a variety of solutions. 【Features】 ■ Excellent wear resistance Co-based high-speed tool steel ■ Low crater wear and high cutting performance ■ Usable for hobs, broaches, punches, etc. *For more details, please refer to the external link page or feel free to contact us.

• Special Steel

The "EXEO Series" is a material for functional components developed through unique alloy design technology and special melting technology. We provide products that enhance characteristics such as low thermal expansion, heat resistance, corrosion resistance, and strength, tailored to meet our customers' high-performance needs and applications, including aircraft, marine, and automotive parts, as well as ultra-precision machine components and injection molding machine parts. [Features] - Material developed through unique alloy design technology and special melting technology - Suitable for aircraft, marine, and automotive parts - Capable of accommodating ultra-precision machine components and injection molding machine parts *For more details, please refer to the PDF document or feel free to contact us.

• Other metal materials

To suppress heat checks and cracks on the molding surface, it is necessary to control the decrease in hardness due to temperature rise and the heat checks caused by thermal fatigue. To mitigate the decrease in hardness due to temperature rise, materials with high softening resistance characteristics are effective, as well as those containing carbides that are difficult to agglomerate. "DURO-F3, F1, FZ, N1" have higher heat resistance compared to general-purpose hot work die steel SKD61, making them suitable for suppressing heat checks and cracks on the molding surface. 【Suppressing the decrease in hardness due to temperature rise】 ■ High softening resistance characteristics are effective ■ Materials containing carbides that are difficult to agglomerate are effective *For more details, please refer to the PDF document or feel free to contact us.

• Special Steel

To prevent chipping and deformation at the tooth tip, it is necessary to suppress microcracks and dents caused by fatigue. To suppress microcracks due to fatigue, a high fatigue strength is effective, and clean materials with small and few inclusions and carbides are also effective. "DURO-V2, F7" are materials that balance hardness and fracture resistance, while maximizing fatigue strength, making them suitable for reducing chipping and deformation at the tooth tip. 【Suppressing microcracks due to fatigue】 ■ High fatigue strength is effective ■ Clean materials with small and few inclusions and carbides are effective *For more details, please refer to the PDF document or feel free to contact us.

• Special Steel

To suppress edge chipping, it is necessary to control the progression of wear (especially adhesive wear) and the occurrence of chipping from the wear surface. To suppress the progression of wear, high wear resistance is required, and larger carbide dissolving high-speed steel is more effective than smaller carbide powder high-speed steel. "DURO-SP, V5" is a special dissolving high-speed steel that contains a relatively high amount of hard carbide and is suitable for suppressing edge chipping due to its excellent wear resistance. 【Suppressing the progression of wear (especially adhesive wear)】 ■ High wear resistance is required ■ Larger carbide dissolving high-speed steel is more effective than smaller carbide powder high-speed steel *For more details, please refer to the PDF document or feel free to contact us.

• Special Steel

The "DURO series" includes mold steels that consist of high-speed steel, matrix high-speed steel, and hot work die steel, with a total of 8 steel types in the lineup. Here we introduce an example of use for the high toughness type matrix high-speed steel "DURO-F1." 【Example of Use】 Main Punch ■ Workpiece: Automotive Parts ■ Material Type Used: DURO-F1 ＜Conventional Material Type: Matrix High-Speed Steel (63HRC), lifespan affected by chipping＞ ■ Hardness: 57HRC ■ Lifespan (Number of Shots): 5 times (chipping) ◎ Suppression of chipping at the thin edge ◎ The high toughness of DURO-F1 is effective *For more details, please refer to the PDF document or feel free to contact us.

• Special Steel

The "DURO series" includes mold steel that consists of high-speed steel, matrix high-speed steel, and hot work die steel, with a total lineup of 8 steel types. Here we introduce an example of use for the high toughness type matrix high-speed steel "DURO-F1." 【Example of Use】Mandrel ■Workpiece: Bearing (SUJ2) ■Material Type Used: DURO-F1 ＜Conventional Material Type: SKD61 (50HRC), lifespan due to breakage＞ ■Hardness: 54HRC ■Lifespan (Number of Shots): 3 times (breakage) ◎ Suppresses breakage due to repeated bending ◎ The hardness and toughness of DURO-F1 are well matched *For more details, please refer to the PDF document or feel free to contact us.

• Special Steel

The "DURO series" includes mold steel that consists of high-speed steel, matrix high-speed steel, and hot work die steel, with a total of 8 types of steel in the lineup. Here we introduce an example of use for the high toughness type matrix high-speed steel "DURO-F1." 【Example of Use】 Knockout Punch ■ Workpiece: Bearing ■ Material Type Used: DURO-F1 <Conventional Material Type: Matrix High-Speed Steel (58HRC), lifespan affected by water cooling hole cracking> ■ Hardness: 56HRC ■ Lifespan (Number of Shots): More than double (water cooling hole cracking) ◎ Suppresses heat checks on the forming surface and cracking from water cooling holes ◎ The toughness of DURO-F1 is effective *For more details, please refer to the PDF document or feel free to contact us.

• Special Steel

The "DURO series" includes mold steel that consists of high-speed steel, matrix high-speed steel, and hot work die steel, with a total of 8 steel types in the lineup. Here we introduce an example of use for the high toughness type matrix high-speed steel "DURO-F1." 【Example of Use】#2 & #3 Forging Die Lower Mold ■Workpiece: 5AT Transmission Gear (Scr420HV) ■Material Type Used: DURO-F1 <Conventional Material Type: Matrix High-Speed Steel (56HRC, Ion Nitriding), Lifespan Based on Heat Check> ■Hardness: 56HRC ■Surface Treatment: Ion Nitriding ■Lifespan (Number of Shots): 2 times (Heat Check) ◎ Suppresses heat checks and wear on the forming surface ◎ The wear resistance and toughness of DURO-F1 are well matched *For more details, please refer to the PDF document or feel free to contact us.

• Special Steel

The "DURO series" includes mold steels that consist of high-speed steel, matrix high-speed steel, and hot work die steel, with a total of 8 steel types in the lineup. Here, we introduce an example of use for the high toughness type matrix high-speed steel "DURO-FZ." 【Example of Use】#3 Punch ■Workpiece: CVJ Outer Race ■Lifetime Factors: Heat softening and heat checks on the punch tip surface ■Material Type Used: DURO-FZ <Conventional Material Type: Matrix High-Speed Steel (59HRC), Lifetime affected by heat checks> ■Hardness: 58HRC ■Surface Treatment: None ■Lifetime (Number of Shots): Good (heat checks) ◎ The heat check resistance of DURO-FZ is effective. *For more details, please refer to the PDF document or feel free to contact us.

• Special Steel

The "DURO series" includes mold steel that consists of high-speed steel, matrix high-speed steel, and hot work die steel, offering a total of 8 types of steel. Here we introduce an example of the high toughness type matrix high-speed steel "DURO-FZ." 【Example of Use】 Forming Die ■ Workpiece: Scroll for car air conditioning (Al alloy, 420℃) ■ Lifespan Factor: Cracks in the stepped part of the forming surface ■ Material Type Used: DURO-FZ <Conventional Material Type: Matrix High-Speed Steel (57HRC, nitrided + lapped), lifespan affected by cracks> ■ Hardness: 57HRC ■ Surface Treatment: Nitriding + Lapping ■ Lifespan (Number of Shots): 2 times (cracks) ◎ The high toughness of DURO-FZ is effective. *For more details, please refer to the PDF document or feel free to contact us.

• Special Steel

The "DURO Series" includes mold steels that consist of high-speed steel, matrix high-speed steel, and hot work die steel, with a total of 8 steel types in the lineup. Here we introduce an example of use for the high toughness type hot work die steel "DURO-N1." 【Example of Use】 4-stage finishing forming punch ■ Workpiece: Bearing (SUJ2) at 750–800℃ ■ Material Type Used: DURO-N1 <Conventional Material Type: Modified SKD61 (51HRC), lifespan due to heat checks> ■ Hardness: 51HRC ■ Lifespan (Number of Shots): 2 times (heat check) ◎ Suppresses heat checks and wear in the tip R area ◎ The high-temperature strength of DURO-N1 is effective *For more details, please refer to the PDF document or feel free to contact us.

• Special Steel

The "DURO series" includes mold steels that consist of high-speed steel, matrix high-speed steel, and hot work die steel, with a total lineup of 8 steel types. Here are examples of the high toughness type hot work die steel "DURO-N1." 【Usage Example】Lower Die ■Workpiece: Automotive Engine Valve (SUH35) ■Material Type Used: DURO-N1 ＜Conventional Material Type: SKD61 (53HRC, gas nitriding), lifespan due to heat checking＞ ■Hardness: 55HRC ■Surface Treatment: Gas Nitriding ■Lifespan (Number of Shots): 50% increase (heat checking, wear) ◎ Suppresses heat checking and wear on the forming surface ◎ The high-temperature strength of DURO-N1 is effective *For more details, please refer to the PDF document or feel free to contact us.

• Special Steel

The "DURO series" includes mold steel that contains high-speed steel, matrix high-speed steel, and hot work die steel, with a lineup of eight steel types. Here, we introduce an example of the high toughness type hot work die steel "DURO-N1." 【Usage Example】Forming Die ■Workpiece: Wheel hub outer ring (SUJ2) ■Material Type Used: DURO-N1 ＜Conventional Material Type: SKD7 (51HRC, ion nitriding), lifespan affected by cracks＞ ■Hardness: 53HRC ■Surface Treatment: Ion Nitriding ■Lifespan (Number of Shots): 70% increase (due to cracks) ◎ Suppresses heat checks on the forming surface and cracks in the R section ◎ The high-temperature strength and toughness of DURO-N1 are well matched *For more details, please refer to the PDF document or feel free to contact us.

• Special Steel

The "DURO series" includes mold steel that consists of high-speed steel, matrix high-speed steel, and hot work die steel, with a total of 8 steel types in the lineup. Here we introduce an example of use for the high toughness type matrix high-speed steel "DURO-F7." 【Usage Example】Die ■Work: Hydraulic piston pump ■Material type used: DURO-F7 ＜Conventional material type: SKD11 (50HRC, TiN), lifespan affected by cracks＞ ■Hardness: 61HRC ■Surface treatment: TiN ■Lifespan (number of shots): 3 times (cracks) ◎ Suppresses the occurrence of cracks (longitudinal cracks) on the inner diameter surface ◎ The high toughness of DURO-F7 is effective *For more details, please refer to the PDF document or feel free to contact us.

• Special Steel

The "DURO series" includes mold steels that consist of high-speed steel, matrix high-speed steel, and hot work die steel, with a total of 8 steel types in the lineup. Here we introduce an example of use for the high toughness type matrix high-speed steel "DURO-F7." 【Example of Use】 Forming Rack (m0.5×PA20°) ■ Workpiece: Automotive parts shaft (S55CV, 22–28HRC) ■ Material Type Used: DURO-F7 <Conventional Material Type: Matrix High-Speed Steel (62HRC, ion nitriding treatment), lifespan affected by cracks> ■ Hardness: 62HRC ■ Surface Treatment: Ion Nitriding Treatment ■ Lifespan (Number of Shots): 50% increase (due to cracks) ◎ Suppresses chipping at the tooth tip ◎ The high fatigue strength of DURO-F7 is effective *For more details, please refer to the PDF document or feel free to contact us.

• Special Steel

The "DURO series" includes mold steel that consists of high-speed steel, matrix high-speed steel, and hot work die steel, with a total lineup of 8 steel types. Here we introduce an example of use for the high toughness type matrix high-speed steel "DURO-F7." 【Usage Example】 V-groove forming roller ■ Work: Car air conditioning electromagnetic clutch, tension pulley (SPHE) ■ Material type used: DURO-F7 (Conventional material type: matrix high-speed steel (60HRC), lifespan affected by micro-cracks) ■ Hardness: 65HRC ■ Lifespan (number of shots): 5 times (micro-cracks) ◎ Suppression of micro-cracks at the tooth tip ◎ The high toughness of DURO-F7 and its strength of 65HRC are effective *For more details, please refer to the PDF document or feel free to contact us.

• Special Steel

The "DURO series" includes mold steels that consist of high-speed steel, matrix high-speed steel, and hot work die steel, with a total of 8 steel types in the lineup. Here are examples of the ultra-high toughness type matrix high-speed steel "DURO-V2." 【Usage Example】Mandrel ■Workpiece: Case for viscous coupling ■Material Type Used: DURO-V2 ＜Conventional Material Type: Matrix high-speed steel (58HRC, TiN), lifespan affected by cracks＞ ■Hardness: 62HRC ■Lifespan (Number of Shots): 10 times (cracks) ◎ Suppresses cracks at the bottom of gear grooves ◎ The high fatigue strength of DURO-V2 is effective *For more details, please refer to the PDF document or feel free to contact us.

• Special Steel

The "DURO Series" includes mold steel that consists of high-speed steel, matrix high-speed steel, and hot work die steel, with a total lineup of 8 steel types. Here are examples of the ultra-high toughness type matrix high-speed steel "DURO-V2." 【Usage Example】 Upper Die, Lower Die ■ Workpiece: CVJ Tripod (SCM420) ■ Material Type Used: DURO-V2 ＜Conventional Material Type: Matrix High-Speed Steel (62HRC, TiN), lifespan affected by cracking＞ ■ Hardness: 62HRC ■ Surface Treatment: TiN ■ Lifespan (Number of Shots): 60% increase (cracking) ◎ Suppresses the occurrence of cracks (circumferential cracking) on the forming surface ◎ The high toughness of DURO-V2 is effective *For more details, please refer to the PDF document or feel free to contact us.

• Special Steel

The "DURO series" includes mold steels that consist of high-speed steel, matrix high-speed steel, and hot work die steel, with a total of 8 types of steel in the lineup. Here we introduce an example of use for the ultra-high toughness type matrix high-speed steel "DURO-V2." [Example of Use] Middle Punch ■ Workpiece: Mold Rectifier (Copper) ■ Material Type Used: DURO-V2 <Conventional Material Type: Matrix High-Speed Steel (61HRC), lifespan affected by cracks> ■ Hardness: 61HRC ■ Lifespan (Number of Shots): 70% increase (wear) ◎ Crack suppression in complex-shaped protrusions ◎ The high toughness of DURO-V2 is effective *For more details, please refer to the PDF document or feel free to contact us.

• Special Steel

The "DURO Series" includes mold steels that consist of high-speed steel, matrix high-speed steel, and hot work die steel, with a total lineup of 8 steel types. Here we introduce an example of the ultra-high toughness type matrix high-speed steel "DURO-V2." 【Usage Example】 Ring Punch ■ Workpiece: Automotive CVJ Tripod ■ Material Type Used: DURO-V2 ＜Conventional Material Type: Matrix High-Speed Steel (60HRC), lifespan affected by deformation＞ ■ Hardness: 61HRC ■ Lifespan (Number of Shots): 7 times (wear) ◎ Suppresses deformation and vertical cracking due to punch surface flattening ◎ The hardness and high toughness of DURO-V2 are effective *For more details, please refer to the PDF document or feel free to contact us.

• Special Steel

The "DURO series" includes mold steel that consists of high-speed steel, matrix high-speed steel, and hot work die steel, with a total lineup of 8 steel types. Here we introduce an example of use for the high toughness and high wear-resistant type high-speed steel "DURO-V5." 【Example of Use】 Punch ■ Workpiece: Automotive parts (Fe-based powder) ■ Material type used: DURO-V5 ＜Conventional material type: 4V series powder high-speed steel (60HRC), lifespan affected by cracking＞ ■ Hardness: 60HRC ■ Lifespan (number of shots): More than 4 times (due to cracking) ◎ Suppresses wear and cracking in the R part of the tip surface ◎ The high wear resistance and toughness of V5 are effective *For more details, please refer to the PDF document or feel free to contact us.

• Special Steel

The "DURO Series" includes mold steel that consists of high-speed steel, matrix high-speed steel, and hot work die steel, with a total of 8 types of steel in the lineup. Here we introduce an example of use for the high toughness and high wear-resistant type high-speed steel "DURO-V5." 【Example of Use】 Shaving Die & Piercing Die ■ Workpiece: Seatbelt Buckle (S55C 2-3t) ■ Material Used: DURO-V5 <Conventional Material: SKH40 (Powder) (64HRC), Lifespan due to Wear> ■ Hardness: 64HRC ■ Lifespan (Number of Shots): 3 times (wear) ◎ Suppression of wear in corner areas ◎ The wear resistance of DURO-V5 is effective *For more details, please refer to the PDF document or feel free to contact us.

• Special Steel

The "DURO series" includes mold steels that consist of high-speed steel, matrix high-speed steel, and hot work die steel, with a total lineup of 8 steel types. Here we introduce an example of use for the high toughness and high wear-resistant type high-speed steel "DURO-V5." 【Example of Use】 Punch Pin ■ Workpiece: Automotive steering components (SC material) ■ Material type used: DURO-V5 ＜Conventional material type: SKH51 (59HRC, PVD coating), lifespan affected by cracking＞ ■ Hardness: 63HRC ■ Surface treatment: (PVD) coating ■ Lifespan (number of shots): Up to 3 times (compared to cracking) ◎ Suppresses wear and cracking at the corner of the tip ◎ The high wear resistance and toughness of V5 are effective *For more details, please refer to the PDF document or feel free to contact us.

• Special Steel

The "DURO series" includes mold steel that consists of high-speed steel, matrix high-speed steel, and hot work die steel, with a total of 8 steel types in the lineup. We would like to introduce an example of use for the high toughness and high wear-resistant type high-speed steel "DURO-V5." 【Example of Use】 Main Punch ■ Workpiece: Seat belt gear component (S45C 5.1mm) ■ Material Type Used: DURO-V5 ＜Conventional Material Type: Matrix High-Speed Steel (61HRC), lifespan affected by cracking and chipping＞ ■ Hardness: 62HRC ■ Lifespan (Number of Shots): Good (chipping) ◎ Suppresses wear and chipping in the gear groove area ◎ Suppresses wear and vertical cracking in the pin hole forming area ◎ The high wear resistance and toughness of DURO-V5 are effective *For more details, please refer to the PDF document or feel free to contact us.

• Special Steel

The "DURO series" includes mold steel that consists of high-speed steel, matrix high-speed steel, and hot work die steel, with a total of 8 steel types in the lineup. Here are examples of the high wear-resistant type high-speed steel "DURO-SP." 【Usage Example】 Punch ■ Workpiece: Joint parts ■ Material type used: DURO-SP <Conventional material type: SKH40 powder (66HRC, TiCN coating), lifespan affected by chipping> ■ Hardness: 67HRC ■ Surface treatment: TiCN coating ■ Lifespan (number of shots): 10% increase (chipping) ◎ Suppresses wear and cracks at the tip step section ◎ The high wear resistance and strength of DURO-SP are effective *For more details, please refer to the PDF document or feel free to contact us.

• Special Steel

The "DURO Series" includes mold steel that consists of high-speed steel, matrix high-speed steel, and hot work die steel, with a total of 8 steel types in the lineup. Here are examples of the high wear-resistant type high-speed steel "DURO-SP." 【Usage Example】 Punch ■ Workpiece: Automotive parts (S45C) ■ Material type used: DURO-SP <Conventional material type: SKH40 powder (60HRC, TiCN coating), lifespan affected by chipping> ■ Hardness: 63HRC ■ Surface treatment: TiN coating ■ Lifespan (number of shots): 40% increase (chipping) ◎ Suppresses wear and chipping at the inner diameter cutting edge ◎ The high wear resistance of DURO-SP is effective *For more details, please refer to the PDF document or feel free to contact us.

• Special Steel

The "DURO Series" includes mold steel that consists of high-speed steel, matrix high-speed steel, and hot work die steel, with a total of 8 steel types in the lineup. Here are examples of the high wear-resistant type high-speed steel "DURO-SP." 【Usage Example】 Punch ■ Workpiece: Bay window arm part (S55C 3.2t) ■ Material type used: DURO-SP <Conventional material type: SKH51 (61HRC, WPC treatment), lifespan due to chipping> ■ Hardness: 64HRC ■ Surface treatment: WPC treatment ■ Lifespan (number of shots): 5 times (chipping) ◎ Suppresses wear at the cutting edge and the associated chipping ◎ The high wear resistance of DURO-SP is effective * For more details, please refer to the PDF document or feel free to contact us.

• Special Steel