International Mold Steel

Overview  

High hard and tough matrix type high speed tool steel

Applications include:

Warm forging dies and punches

Cold forging dies and punches

Unique Characteristics

Matrix type high speed tool steel available for warm and cold forging tools where critical performance is required. DRM2 prolongs service life due to its higher hardness and toughness than those of conventional grades.
  • Applicable with the maximum hardness 62HRC
  • Fine microstructure contributes to high toughness and fatigue strength
  • Greater hardenahility 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
Physical properties


Drilling machinability


Nitriding
DRM2   Harden 1100C (2012F)    Draws (minimum of 2)
Recommend a minimum 6 barr quench
Maximum toughness 600C (1112F) HRC58
Good toughness & wear 580C (1076F) HRC60
Maximum wear 550C (1022F) HRC62

Re-forging
Temperature

Heat treatment conditions (ºC)

Hardness

Annealing

Quenching

Tempering

Annealed

Hardening/

Tempering

Requested to inquire

800~880
Slow cooling

1050~1120
OQ, GC, Salt bath

550~620
AC, ≥ twice

≤235HB

56~62HRC


OQ: Oil quenching, GC: Gas quenching in vacuum furnace, AC: Air cooling

Microstructure (As annealed)
Fine and uniform microstructure with less coarse carbides.

Tempering hardness

Toughness: charpy impact property

Temper softening resistance

Hot hardness

Heat checking resistance

Fatigue strength

Hardenability

Dimensional changes in heat treatment

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