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DRM Product Index:
DRM1 
DRM2 
DRM3 
DRM3
Cold Forging Die Steel

This conventional grade MH88 has been improved to DRM3. High hardness and tough DRM3 with excellent hardenability is suitable for high precision cold working tools. 

See below for our product sheet:

Daido's Dream Series
DRM3

Cold Forging Die Steel

High hard and tough high speed tool steel with excellent hardenability

Features

Conventional grade MH88 has been improved to DRM3. High hardness and tough DRM3 with excellent hardenability is suitable for high precision cold working tools.

  1. Applicable with the maximum hardness 66HRC
  2. Fine carbides contribute higher toughness and fatigue strength than those of MH51 equivalent to SKH51 
  3. Greater hardenability results in high performance even in large dies and gas quenching in vacuum furnace. 
  4. Double melting realizes clean and homogeneous steel with less non-metallic inclusions

Applications

  • Cold forging dies and punches
  • Cold work roll, emboss roll
  • Tools quenched by gas in vacuum furnace

Heat treatment

DRM3 Harden 1120C (2048F) Draws (minimum of 2) Maximum toughness 620C (1148F) HRC62
Recommend a minimum 6 barr quench Good toughness & wear 590C (1094F) HRC64
Maximum wear 550C (1022F) HRC66
Re-forging
Temperature
Heat treatment conditions (șC) Hardness
Annealing Quenching Tempering Annealed Hardening/Tempering
Requested to inquire 800~880
Slow cooling
1100~1140
OQ, GC, Salt bath
550~620
AC, twice
235HB 62~66HRC
OQ: Oil quenching, GC: Gas quenching in vacuum furnace,  AC: Air cooling

Microstructure (As annealed)
Finely distributed coarse carbides. 

Tempering hardness
Toughness: charpy impact property
Hot hardness
Heat checking resistance
Hardenability
Fatigue Strength
Dimensional changes in heat treatment
Durability of drilling tool

Physical Properties

Nitriding

US Contact:

International Mold Steel, Inc.
6796 Powerline Drive
Florence, KY 41042 USA
Tel: 859.342.6000 or 800.625.6653
Fax: 859.342.6006
Literature: info@imsteel.com
Sales Desk:
salesdesk@imsteel.com
Web: www.imsteel.com

 


www.daido.co.jp
IMPORTANT NOTE
Please be advised that Daido Steel shall not be held responsible for damage caused by misunderstanding or improper use of the technical information contained in this brochure.
The contents of this brochure may be subject to change without notice. Please inquire of related department for the latest infromation. 
No portion of this brochure may be reproduced without express permission of Daido steel. 

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International Mold Steel, Inc.
6796 Powerline Drive
Florence, KY 41042 USA
Tel: 859.342.6000 or 800.625.6653
Fax: 859.342.6006
Literature: info@imsteel.com
Sales Desk:
salesdesk@imsteel.com
Web: www.imsteel.com

 

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