日本金型材 Product Lineup

We would like to introduce the "mold steel" that we handle. Starting with 40HRC pre-hardened steel NAK55/NAK80, we offer steel types that achieve high hardness through heat treatment, stainless materials, and steel types that excel in mirror finish, machinability, and corrosion resistance. We can also select steel suitable for surface treatments such as texturing, nitriding, and plating. With years of know-how and a rich inventory lineup, we provide optimal proposals tailored to our customers. Please feel free to contact us when needed. 【Features】 ■ A wide range of inventory from large sizes to small sizes ■ Flexible selection from drawing processing to milling, SG, cutting, etc., according to customer needs ■ Always maintaining stock, allowing for short delivery times and low prices ■ Providing high-quality services and products to support our customers *For more details, please refer to the PDF document or feel free to contact us. 【Daido Mold Material Physical Properties】 https://www.daido.co.jp/common/pdf/pages/products/tool/sd2307_pla_jp.pdf

"PXA30" is a plastic mold steel (improved P20) with a hardness of 30 to 33 HRC at the time of delivery and excellent weldability in the SCM series. By improving the manufacturing process, we have reduced oxide-based non-metallic inclusions compared to conventional improved P20 steel, thereby stabilizing the mirror finish. Additionally, it excels in machinability, texturing, and electrical discharge machining. Please feel free to contact us when you need it. Manufacturer: Daido Steel Co., Ltd. 【Features】 ■ Compatible with large sizes ■ Mirror finish - By improving the manufacturing process, we have reduced oxide-based non-metallic inclusions compared to conventional improved P20 steel, stabilizing the mirror finish. ■ Basic characteristics - Based on conventional improved P20 steel, it has equivalent hardness and nitriding properties, with mechanical properties and electrical discharge machining capabilities that are equal to or better than those of conventional P20. *For more details, please refer to the PDF document or feel free to contact us.

Two types: "NAK55" with excellent machinability and mirror finish, and "NAK80" focusing on high mirror finish. Both are pre-hardened (40HRC) plastic mold steels. They are heat-treated under optimal conditions to achieve 37-43HRC (surface guarantee), allowing for direct use in mold engraving. They have good mirror polishing properties and provide satisfactory gloss. As Ni-Al-Cu based age-hardened steel, they offer good machinability and surface finish. Manufacturer: Daido Steel Co., Ltd. 【Features】 <NAK55> - Suitable for large sizes - Pre-hardened steel that can be processed as is - Good machinability and surface finish - Good mirror polishing properties - Easy to polish after electrical discharge machining - Good weldability <NAK80> - Improved mirror polishing properties, electrical discharge machining surface, and toughness compared to NAK55 - Extremely good mirror polishing properties 【Technical Data】 https://www.daido.co.jp/common/pdf/pages/products/tool/technical-data/sd2302-j03.pdf *For more details, please refer to the PDF document or feel free to contact us.

"NAK86K" is a plastic mold steel with excellent material properties such as corrosion resistance, mirror finish, and toughness. It is effective as a rust prevention and cracking prevention measure for "NAK80." It is compatible with nitriding and can be expected to achieve high hardness. Additionally, it can be used as is at HRC 35-38. Please feel free to contact us when you need it. Manufacturer: Daido Steel Co., Ltd. 【Features】 ■ Improved corrosion resistance ■ Enhanced toughness ■ Pre-hardened steel ■ Excellent mirror finish processing *For more details, please refer to the PDF document or feel free to contact us.

"S-STAR" is a plastic mold steel that combines corrosion resistance against flame-retardant resins, wear resistance against glass fibers, and ultra-mirror finish for transparent resin molds. Through special melting and homogenization treatment, the internal quality is made more uniform, making it suitable for resin molding molds that require high mirror finish for design and functional products. It can be used for transparent resin molds, medical device molds, cosmetic container molds, and more. Please feel free to contact us when you need assistance. Manufacturer: Daido Steel Co., Ltd. 【Features】 ■ Ultra-mirror finish ■ Excellent corrosion resistance ■ Pre-hardened steel ■ Quenching and tempering ■ Good texture processing and electrical discharge machining 【Technical Data】 https://www.daido.co.jp/common/pdf/pages/products/tool/technical-data/sd2303-j04.pdf https://www.daido.co.jp/common/pdf/pages/products/tool/s_star_leaflet.pdf *For more details, please refer to the PDF documents or feel free to contact us.

"G-STAR" is a plastic mold steel that has added free-cutting elements, providing good machinability even in stainless steel grades. It is used as a master mold for plastic and rubber molds. It is suitable for combination use with the resin molding mold material "S-STAR." Additionally, the delivery hardness is 33HRC, and it can be used as is. Please feel free to contact us when placing an order. Manufacturer: Daido Steel Co., Ltd. 【Features】 ■ Excellent corrosion resistance ■ Excellent machinability ■ Pre-hardened steel ■ Quenched and tempered (maximum hardness 49HRC) 【Technical Data】 https://www.daido.co.jp/common/pdf/pages/products/tool/technical-data/sd2303-j04.pdf *For more details, please refer to the PDF document or feel free to contact us.

"STAVAX ESR" is a high-performance, precision stainless steel for plastic molds, developed by Uddeholm in Sweden, with a pre-hardened hardness of 30HRC. It has excellent corrosion resistance, superior polishability, machinability, and dimensional stability, surpassing SUS420J2. Additionally, due to its excellent resistance to pitting corrosion, it is less prone to stress corrosion cracking, which is a concern with SUS420 series steels. Manufacturer: Uddeholm 【Features】 ■ Stainless steel pre-hardened steel (ESR material) with a hardness of HRC 27-35 upon delivery ■ Excellent corrosion resistance exceeding SUS420J2, along with good polishability, machinability, and dimensional stability ■ Additional heat treatment can achieve a maximum hardness of 53HRC, allowing for excellent mirror finish (#12000) ■ Excellent resistance to pitting corrosion, making it less susceptible to stress corrosion cracking, which is a problem with SUS420 series steels *For more details, please refer to the PDF document or feel free to contact us.

"TYRAX ESR" is a stainless steel suitable for plastic molds used in high-performance plastics with added glass fibers and flame retardants. It achieves a high balance of wear resistance and corrosion resistance. It has a microstructure with a matrix of extremely fine carbonitrides, allowing for a high-gloss surface to be obtained with a short polishing process. Please feel free to contact us when you need assistance. Manufacturer: Wudholm [Features] ■ Achieves a maximum hardness of 58 HRC through quenching and tempering ■ Achieves a high balance of wear resistance and corrosion resistance ■ Has a microstructure with a matrix of extremely fine carbonitrides, allowing for a high-gloss surface to be obtained with a short polishing process * For more details, please refer to the PDF document or feel free to contact us.

"PD613" is a cold work die steel for plastic molds that performs special dissolution with excellent durability, mirror finish, toughness, and various other properties. It is used for high hardness, high mirror finish plastic molds, and cold press molds with high toughness and high fatigue strength. It achieves a hardness of 56 to 61 HRC through processing, providing excellent wear resistance and durability. Additionally, it has minimal dimensional changes during heat treatment, which is favorable. Please feel free to contact us for inquiries. Manufacturer: Daido Steel Co., Ltd. 【Features】 ■ Excellent wear resistance and durability due to a hardness of 56 to 61 HRC achieved through heat treatment ■ Superior mirror finish ■ Minimal and favorable dimensional changes during heat treatment ■ Excellent toughness ■ Superior nitriding characteristics ■ Excellent embossing processability 【Technical Data】 https://www.daido.co.jp/common/pdf/pages/products/tool/technical-data/sd2301-j02.pdf *For more details, please refer to the PDF document or feel free to contact us.

"TP1" is a plastic mold steel (improved S53C type steel) that can be widely used for various sizes of molds, from general small molds to large molds such as bumpers. It undergoes excellent heat treatment to minimize segregation even in large sizes, achieving stable machinability. Additionally, it is pre-hardened steel with a maximum hardness of HB215, allowing for immediate use. Please feel free to contact us when you need assistance. Manufacturer: Seashohara Special Steel Co., Ltd. 【Features】 ■ Available in various sizes to accommodate large sizes, with a rich inventory ■ Pre-hardened steel with a maximum hardness of HB215, allowing for immediate use ■ Excellent heat treatment minimizes segregation even in large sizes, achieving stable machinability *For more details, please refer to the PDF document or feel free to contact us.

"TP4MS" enhances machinability with SeAH's unique MnS shape control technology. It is a pre-hardened steel equivalent to P20, fully considering texture processing and mirror finish processing. It achieves excellent machinability and reduces the production time of molds. It also excels in welding and texture processing. Additionally, it has a hardness of HRC 29-31 and can be used as is. Please feel free to contact us when needed. Manufacturer: SeAH Special Steel Co., Ltd. 【Features】 - Hardness of HRC 29-31, usable as is - Supports large sizes with a variety of sizes available and ample stock - Achieves excellent machinability, reducing mold production time - Excellent in welding and texture processing *For more details, please refer to the PDF document or feel free to contact us.

"KTSM2A" is a SC improved type plastic mold steel that fully considers machinability, texture processing, electrical discharge machining, weldability, and mirror finishing properties. We offer a variety of sizes, with a rich inventory lineup that has been used by many customers for many years. In comparison to "JIS S55C," it has superior hardness that is uniform both internally and externally, and processing time can be reduced by 20-40%. Manufacturer: Kobe Steel, Ltd. 【Features】 ■ Supports large sizes ■ SC series improved type pre-hardened steel ■ Good texture processing properties ■ Uniform cross-sectional hardness ■ Excellent machinability *For more details, please refer to the PDF document or feel free to contact us.

"KTSM31" is a plastic mold steel from the SCM440 series, known for its excellent machinability and superior texture processing capabilities. It is a chromium-molybdenum steel that minimizes segregation even in large sizes. The machining time can be reduced by 20-40% compared to "JIS SCM440." Additionally, due to its high hardness and toughness with minimal segregation, it is suitable for various applications such as bicycle parts, machine components, and jigs. Manufacturer: Kobe Steel, Ltd. 【Features】 ■ Compatible with large sizes ■ Pre-hardened steel from the SCM440 series ■ Excellent machinability ■ Good texture processing capability ■ Suitable for various applications *For more details, please refer to the PDF document or feel free to contact us.

"KTSM3M" is a plastic mold steel for mass production that features uniform hardness both inside and outside the mold, excellent mirror finishability, and wear resistance. It is widely used for products that require a mirror finish. It is supplied after heat treatment, so it can be used as is. Additionally, the hardness is almost uniform both inside and outside, providing excellent consistency, resulting in a uniform texture pattern. Manufacturer: Kobe Steel, Ltd. 【Features】 ■ Suitable for large sizes ■ Improved pre-hardened steel based on AISI P20 ■ Good texture processing capability ■ Excellent mirror finishability ■ Uniform cross-sectional hardness *For more details, please refer to the PDF document or feel free to contact us.

Due to the HRC40 type, it maintains high strength and high mold precision. Special heat treatment suppresses distortion after processing. Please feel free to contact us when you need assistance. Manufacturer: Daido Steel Co., Ltd. 【Features】 ■ Excellent strength ■ Residual stress reduction ■ Pre-hardened steel ■ Excellent machinability *For more details, please refer to the PDF document or feel free to contact us.

"DH2F" is a type of hot work die steel that has been improved from SKD61 and tempered to a level of 40HRC, designed for easy cutting. It is effective for various applications, including plastic molds and die-casting molds. It has good heat check resistance and melt loss resistance. It is already tempered to 37-41HRC, eliminating the need for heat treatment, making it suitable for the production of complex and precise molds and parts that are sensitive to deformation. Additionally, it has excellent machinability, making cutting and mold engraving easy. Manufacturer: Daido Steel Co., Ltd. 【Features】 - Tempered to 37-41HRC (surface hardness) and does not require heat treatment, making it suitable for the production of complex and precise molds and parts that are sensitive to deformation. - Excellent machinability allows for easy cutting and mold engraving. - Reduces mold manufacturing time and lowers costs. - Good heat check resistance and melt loss resistance. - Surface treatment can further enhance wear resistance and corrosion resistance. *For more details, please refer to the PDF document or feel free to contact us.

"DHA1" is a die-casting mold steel that possesses excellent hardenability and high resistance to thermal fatigue and thermal shock. It also exhibits high resistance to melting caused by molten metal. It has good hardenability and excellent resistance to tempering softening. Additionally, it has a high resistance to melting caused by molten metal. Please feel free to contact us when you need it. Manufacturer: Daido Steel Co., Ltd. 【Features】 ■ Spherical carbides are finely and uniformly distributed ■ Good hardenability ■ Excellent resistance to tempering softening ■ Strong against thermal shock and thermal fatigue ■ High resistance to melting caused by molten metal *For more details, please refer to the PDF document or feel free to contact us.

"DHA-WORLD" is a die-casting mold steel that can also be used for large molds. It exhibits high toughness even in the center of large molds. By optimizing the chemical composition of DHA1 (equivalent to JIS-SKD61), the hardenability has been significantly improved, making heat treatment easier and achieving high toughness even in the center of large molds. Additionally, utilizing advanced manufacturing techniques, its various properties are comparable to those of special melting materials, allowing us to meet cost reduction needs. Manufacturer: Daido Steel Co., Ltd. 【Features】 ■ Excellent hardenability ■ Atmospheric melting material *For more details, please refer to the PDF document or feel free to contact us.

We would like to introduce the "non-ferrous materials" that we handle. We offer a wide variety of copper, copper alloys, aluminum alloys, and stainless steel. Oxygen-free copper and beryllium copper are also available for quick delivery at low prices. Additionally, we have a large selection of round materials and can accommodate various processing needs, such as flat grinding, so please feel free to consult with us. 【Main Non-Ferrous Materials】 ■ Copper and Copper Alloys ■ Aluminum Alloys ■ Stainless Steel ■ Round Materials *For more details, please refer to the related links or feel free to contact us.

"COOLMOULD" is a high-strength beryllium copper alloy suitable for plastic molding molds. It is widely used as a material for injection molding molds, or as cores and insert parts made of steel. When incorporated into molds, it eliminates hot spots, allowing for the simplification or reduction of cooling circuits. 【Main Features】 <COOLMOULD> * Available in round bars, plates, and welding rods. * The thermal conductivity is 3 to 5 times higher than that of steel, enabling uniform and rapid heat removal, which improves issues such as product deformation, warping, and low detail transferability, significantly shortening cycle times. * Similar effects can be achieved even when used as cores or insert parts in molds made of steel. - High thermal conductivity - Good corrosion resistance - Good polishability - Good wear resistance - Good anti-seizing properties - Good machinability - High strength and hardness - Good weldability * For more details, please refer to the materials or feel free to contact us.

Let me introduce you to Nikkata's stainless steel materials for plastic molds. ■ Features of Stainless Steel Materials (1) Ultra Mirror Finish: With quenching and tempering, mirror finish can be achieved up to approximately #14000. (2) Long Lifespan: High wear resistance extends the lifespan of molds, leading to reduced manufacturing costs. (3) Corrosion Resistance: Strong against corrosion, reducing maintenance needs. Usage as an alternative to plated molds is increasing. (4) Ultra Precision: With excellent mechanical properties, it is suitable for precision machining. ■ Key Points of Nikkata's Stainless Steel for Plastic Molds (1) Short Delivery Time: With a rich inventory system and in-house integrated production, we can deliver faster than anyone else. (2) Low Price: Leveraging the strength of direct procurement from manufacturers, we offer reasonable prices. (3) Flexibility: From 6F and 6G products to additional processing plates, we can deliver according to customer requests. *Please feel free to contact us.

"DHA-GIGA" is a steel developed by Daido Steel Co., Ltd. for large die-casting molds and giga-casting, originating from Japan. It uses the highly reliable general-purpose hot work die steel, DHA-WORLD, which can be safely used for large die-casting molds. It ensures high toughness even in the center of the mold, suppressing cracking during use. Additionally, by extending the lifespan of the molds, it reduces the frequency of repairs and replacements, contributing to a reduction in total costs. It was developed to meet the needs of electrification and lightweighting in the automotive industry. 【Features】 ■ High hardenability ■ Cost reduction ■ Environmentally friendly *For more details, please refer to the materials or feel free to contact us.

We propose suitable steel materials from various types of steel according to the required heat resistance, pressure resistance, wear resistance, and cost for CFRP/CFRTP molds. ■ S50C/S55C - Hardness of HS30 when cost is a priority. Large forged materials are also available. ■ KTSM31 - Hardness of HRC28, pre-hardened steel. When higher hardness than S50C is required. ■ PXA30/KTSM3M - Hardness of HRC30, pre-hardened steel. When higher hardness than S50C is required. ■ DH2F - Hardness of HRC40, free-cutting pre-hardened hot die steel. ■ DHA1 (SKD61) - Hardness of HRC≦53, general-purpose hot die steel. Strong against thermal shock and thermal fatigue. ■ DHA-Thermo - Hardness of HRC40-47, high thermal conductivity hot die steel. 1.6 times higher thermal conductivity compared to DHA1. ■ DC53 - Hardness of HRC62, cold die steel. High toughness and high hardness. When wear resistance is a priority. We also handle other types of steel. We accept 6-sided milling, polishing, and additional processing. For more details, please contact your nearest sales office. *For more information, please download the PDF or feel free to contact us.

This guide is a simple tool that allows you to select the appropriate plastic mold steel by following a flowchart based on the type of resin and the expected number of shots. Additionally, it summarizes the physical properties and mechanical characteristics (wear resistance, toughness, tensile strength, hardness, etc.) of each steel in a table, enabling you to compare and select the appropriate steel based on specific conditions. Download it now and make use of it in your design work. 【Recommended for】 ■ Engineers who have just started designing molds for resin-molded parts ■ Designers who want to review the mold steel currently in use and reconsider suitable materials *For more details, please feel free to consult with us.

In the medical device industry, high-precision molds are required to ensure the safety and functionality of products. Particularly in the molding of parts with fine structures and complex shapes, the dimensional stability and surface smoothness of the molds directly affect the quality of the products. Inappropriate mold materials can lead to dimensional errors, surface roughness, and even contamination risks to the products. The plastic mold steel "S-STAR" is a high-hardness, ultra-mirror-finish corrosion-resistant plastic mold steel that enhances internal quality through special melting and homogenization treatment, improving mirror finish and stability against thermal deformation. This enables precise molding required for medical device molds. [Application Scenarios] Molds for medical devices, molds for food containers, molding of precision parts, use in clean rooms, etc. [Benefits of Implementation] High-precision part molding, improved product quality, extended mold lifespan, etc. *For more details, please refer to the PDF materials or feel free to contact us.