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Plastic Mould Steel Product List and Ranking from 5 Manufacturers, Suppliers and Companies

Last Updated： Aggregation Period:Oct 01, 2025～Oct 28, 2025
This ranking is based on the number of page views on our site.

Plastic Mould Steel Manufacturer, Suppliers and Company Rankings

Last Updated： Aggregation Period:Oct 01, 2025～Oct 28, 2025
This ranking is based on the number of page views on our site.

  1. 日本金型材 Saitama//Trading company/Wholesale
  2. ニーズワン South Korea//Manufacturing and processing contract
  3. 不二越　マテリアル事業部 Toyama//Ferrous/Non-ferrous metals
  4. 4 タカギスチール 本社 Aichi//Trading company/Wholesale
  5. 4 竹内ハガネ商行 本社 Tokyo//Trading company/Wholesale
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Plastic Mould Steel Product ranking

Last Updated： Aggregation Period:Oct 01, 2025～Oct 28, 2025
This ranking is based on the number of page views on our site.

  1. Plastic mold steel "PD613" 日本金型材
  2. Plastic mold steel 'KTSM31' 日本金型材
  3. General plastic mold steel 'TP1/TP4/TP4M' ニーズワン
  4. 4 Plastic mold steel "NAK86K" 日本金型材
  5. 5 Plastic mold steel "TP4MS" 日本金型材

Plastic Mould Steel Product List

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Durable, mirror-finish plastic mold steel "PROVA Series"

Durable, mirror-finish plastic mold steel "PROVA Series"

It is a high-quality special stainless steel ideal for plastic molding molds.

The PROVA series of corrosion-resistant, mirror-finish plastic mold steel is a high-quality special stainless steel optimized for plastic molding molds, achieved through new alloy design and special melting technology. It excels in corrosion resistance, wear resistance, and mirror finish, making it ideal for light guide plate molding molds, aspheric lens molding molds, and more. 【Features】 ○ Excellent mirror finish ○ Excellent machinability ○ Excellent corrosion resistance For more details, please contact us or download the catalog.

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High-performance, precision plastic mold steel 'NAK55/NAK80'

High-performance, precision plastic mold steel 'NAK55/NAK80'

Statutory limitation hardening type, special dissolution adoption, 40HRC level pre-hardened type.

"NAK55/NAK80" is a high-performance, precision plastic mold steel with a pre-hardened type at 40HRC level. "NAK55" is suitable for precision molds with minimal distortion during use. Additionally, "NAK80" has excellent mirror polishing properties, among other features. 【Features】 <NAK55> ■ It has been heat-treated to 37-43HRC (surface guarantee) under optimal conditions, allowing for direct use in mold engraving. ■ It is a Ni-Al-Cu based age-hardenable steel. ■ It has good mirror polishing properties, achieving satisfactory gloss. ■ It has good texture processing properties. *For more details, please refer to the PDF document or feel free to contact us.

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Plastic mold steel "PXA30"

Plastic mold steel "PXA30"

Compatible with large molds! This is a pre-hardened steel equivalent to P20, excellent in machinability, texture processing, and electrical discharge machining!

"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.

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Plastic mold steel "S-STAR" Ver. Up!!

Plastic mold steel "S-STAR" Ver. Up!!

Improved refining methods and uniformity of the organization have further enhanced the mirror finish and stability of thermal treatment dimensional changes in high hardness, ultra-mirror, corrosion-resistant plastic mold steel.

"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.

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Plastic mold steel "PD613"

Plastic mold steel "PD613"

The reliability of the quality is outstanding! It excels in durability, mirror finish, toughness, and nitriding properties!

"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.

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Plastic mold steel "NAK86K"

Plastic mold steel "NAK86K"

High-performance pre-hardened mold steel with excellent corrosion resistance, mirror finish, and toughness!!

"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.

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Plastic mold steel "TP4MS"

Plastic mold steel "TP4MS"

Developed to meet the needs of Japanese mold manufacturers! This is a pre-hardened steel equivalent to P20, with excellent mirror finish, texture processing, and machinability!!

"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.

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Precision Plastic Mold Steel 'SMAT'

Precision Plastic Mold Steel 'SMAT'

Ensuring high cleanliness and excellent characteristics through ESR engineering! Proud of uniform quality even in large sizes【Achieving cost reduction】.

The "SMAT" series is a brand of precision plastic mold steel uniquely developed by Seah Changwon Special Steel, due to the increasing size and high quality of products such as automotive lamps and TVs. It allows for easy mold manufacturing and modification, minimizing processing loss and enabling cost reduction. This steel contributes to high-quality injection molding and improved productivity. We provide excellent and differentiated prices, quality, delivery times, and after-sales service to the Korean market, which had been reliant on imports, and we are growing together with our customers. Please consider this for cost reduction. 【Features】 ■ Excellent machinability and weldability ■ Various dimensions and shapes ■ Improved mirror finish and thermal conductivity ■ Diverse product lineup *For more details, please download the PDF or feel free to contact us.

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Precision Plastic Mold Steel "SMAT F"

Precision Plastic Mold Steel "SMAT F"

High-precision steel material that is easy to process with shot peening and electrical discharge machining! 【Achieving cost reduction】

"SMAT F" is a pre-hardened precision plastic mold steel with a hardness of HRC 40, classified as a Ni-Al-Cu alloy precipitation-hardened type. Unlike "SMAT E," this steel grade is produced in dimensions of 500mm or less. It excels in mirror finish, texture processing, and electrical discharge machining, making it suitable for high-gloss precision plastic injection molding in various fields, particularly for injection molds with complex and intricate shapes that experience minimal dimensional distortion. Please consider it for achieving cost reductions. 【Specifications (partial)】 ■ Impact toughness (J/cm²): 20 ■ Tensile properties (MPa, %) - Y.S: 1060 - T.S: 1220 - El.: 17 - R.A: 51 *For more details, please download the PDF or feel free to contact us.

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Plastic mold steel 'NAK55'/'NAK80'

Plastic mold steel 'NAK55'/'NAK80'

Supports large molds! Excellent in texture processing, electrical discharge machining, and machinability, with good mirror polishing properties due to special melting!

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.

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Plastic mold steel "G-STAR"

Plastic mold steel "G-STAR"

Excellent hardenability! A free-cutting stainless pre-hardened steel that combines corrosion resistance and machinability!

"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.

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Plastic mold steel "KTSM2A"

Plastic mold steel "KTSM2A"

This is a pre-hardened steel of the improved SC type, compatible with various sizes, and excels in machinability, texture processing, and strength!!

"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.

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Plastic mold steel 'KTSM31'

Plastic mold steel 'KTSM31'

SCM440 series pre-hardened steel with excellent machinability and texture processing! It can be used for a wide range of applications, including mechanical parts and jigs.

"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.

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Plastic mold steel "TP1"

Plastic mold steel "TP1"

Suppresses segregation and achieves stable machinability! This is an improved S53C-type steel suitable for large mold materials!!

"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.

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General plastic mold steel "TP"

General plastic mold steel "TP"

High-quality plastic mold steel brand produced through high-definition purification and advanced forging/heat treatment methods [Achieving cost reduction].

The "TP" series is high-quality mold steel supplied through suitable alloy design, high-purity refining technology, and advanced forging and heat treatment methods, all backed by long-accumulated technical expertise. It ensures the appearance quality through the removal of oxide scale and precise inspection. Customers can choose from a variety of products that fit their usage environment and budget at any time. Please consider this for achieving cost reduction. 【Features】 ■ Excellent embossing processability ■ Excellent machinability ■ Minimization of hardness deviation ■ Excellent appearance quality *For more details, please download the PDF or feel free to contact us.

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