DRM3

Cold Forging Die Steel

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Overview

High hard and tough high speed tool steel with excellent hardenability

Applications include:

Unique Characteristics

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

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

Cold forging dies and punches

Cold work roll, emboss roll

Tools quenched by gas in vacuum furnace

Physical Properties

Physical properties

Durability of drilling tool

Nitriding

Heat Treatment

DRM3 Harden 1120C (2048F) Draws (minimum of 2)
Recommend a minimum 6 barr quench

Maximum toughness 620C (1148F) HRC62
Good toughness & wear 590C (1094F) HRC64
Maximum wear 550C (1022F) HRC66

Re-forging Temperature	Heat treatment conditions (ºC)			Hardness
Re-forging Temperature	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