DCMX™ Technical Information

Daido Steel Co. Ltd., since its founding in Japan in 1916, has extensive skills in combining scrap steel with other materials to achieve strength, machinability, and other properties to meet stringent requirements. As one of the world's largest producers of special steel, Daido Steel offers value-added steels such as automobile transmissions and engine parts, as well as components used in ships, aircraft, and electric generators. Tool steel is among its core products and the company has a wide range of products for cold work tool steels, hot work tool steels, high speed tool steels, and plastic mold steels. Daido Steel continues to provide its customers with quality products and high performance technical support.

High hardness; With high tempering temperature and high dimensional stability, a hardness of 62.5 HRc can be achieved, resulting in high wear resistance.

High toughness Thanks to this, cracking, breaking, and chipping on the cutting edge are prevented.

Isotropic; Thanks to the isotropic structure, distortion after heat treatment can be easily controlled.

Machinability; It is developed with additional additives and finely dispersed carbides.

DCMX has a very fine grain structure that is almost completely free of coarse carbides. In this way, it has a very high toughness.

The very fine grain structure also gives the steel its isotropic feature.

DCMX reaches a hardness of 58-60HRc by austenitizing at 1030° C and then tempering at 2x520 ° C.This is also the most commonly applied tool steel hardening, Provides a great advantage over other special cold work tool steels, you won't have to wait for custom recharge.The maximum achievable hardness is 62.5 HRc.In order to reach it, it should be tempered at 2x500 ° C.

Hardening (Austenitizing, Quenching) temperature: 1000-1050°C, air cooling.

Tempering temperature: Low: 150-200 ° C, High: 480-560 ° C, air cooling, at least twice.

Stabilization annealing: 400° C, at least 1 hour.

Annealed hardness: ≦235HB

Hardness after hardening and tempering: 56-62.5 HRc

• From 310x21mm to 600x200mm as flat bars and blocks,
• In round diameter from 20mm to 200mm,

Stock is kept continuously. As it is a new steel, the stock is increasing rapidly. Please contact for current sizes.

 We continuously diversify and strengthen our stocks in order to offer more suitable size options to our customers. 

• In punches,
• In dies and tools for cold stamping and cold forging.
• Especially in cases where problems such as galling and peeling of the coating occur in cold processing of new generation high strength sheets,
• Internal blocks of composite molds where dimensional stability is required,
• Trimming molds where the main problem is break and chipping of the mold.

DCMX is commonly used.