AISI A-8 Mod



Description

Cr-Mo alloyed through hardening steel with high tempering resistance.

Equivalent Grades

American German Japanese China Poland
  (W.Nr) (DIN)      
AISI A-8 Mod 1.2362 MODX63CrMoV51---

Chemical Composition (AISI A-8 Mod)

  C Si Mn P S Cr Mo V W Co Ni
AISI A-8 Mod 0.500.950.400.150.0038.251.30.40.010.15

Properties

Air Hardening Tool Steel with good toughness and high wear resistance as well as retention of hardness and hot wear resistance.

Modulus of elasticity [103 x N/mm2]: 210 Density [g/cm3]: 7.81

Applications


1. Intermediate rolls for cluster mills

2. Trimming dies

3. Hot cutting shears.


Heat Treatment


Soft Annealing

Heat to 800-840oC, cool slowly in furnace. This will produce a maximum Brinell hardness of 250.

Stress Relieving

Stress relieving to remove machining stresses should be carried out by heating to 600-650oC, holding for one hour at heat, followed by air cooling. This operation is performed to reduce distortion during heat treatment.

Hardening

Harden from a temperature of 980-1020oC followed by oil quenching or warm bath quenching. Hardness after quenching is 61-63 HRC.

Tempering Temperature (oC) vs. Hardness (HRC)

100oC
200oC
300oC
400oC
500oC
550oC
61
59
58
57
61
58
Tempreing Curve: