Plastic Mould Steels

1.2738 Standards DIN 40CrMnNiMo 8-6 -4

Chemical Composition

% C0,35-0,45
% Si0,20-0,40
% Mn1,30-1,60
% Cr1,80-2,10
% Mo0,15-0,25
% Ni0,90-1,20

Applications

It is used in plastic molds and pressure casting mold holders, extrusion press molds.

Heat Treatment Properties

  • Stress Relief °C
    650
  • Soft Annealing °C
    710-740
  • Delivery Hardness
    +A / max. 280-325

Hardness

  • Austenitizing °C 
    840-880 
  • Cooling
    Oil, Hot Bath, Air

Hardness After Hardening

  • HRC
    52
Tempering °C 100 200 300 400 500 600 700
HRC 52 51 49 46 42 36 28
Tensile Strenght N/mm2 1790 1730 1620 1480 1330 1140 920

2738

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