1.2312 (40CrMnMoS8_6) Tool Steel
1.2312 (40CrMnMoS8_6)
Plastic mould steel with additional sulphur, usually supplied in a quenched and tempered condition. Polishable, better machinibility compared to 1.2311. Similar to AISI P20+S.
Manufactured by Dörrenberg Edelstahl.
Area of Application
Plastic moulds, frames for plastic pressure dies, hydroforming tools.
Chemical Composition
Code: 1.2312, MCMS 40CrMnNiMo8-6-4
Carbon |
Chromium |
Molybdenum |
Manganese |
Sulfur |
C |
Cr |
Mo |
Mn |
S |
0,40 |
1,90 |
0,20 |
1,50 |
0,05 |
Heat Treatment
|
|
Temperature |
Cooling |
Hardness |
Soft Annealing |
710 - 740 °C |
Furnace |
235 HB |
Stress Relief Annealing |
500 - 550°C |
Furnace |
|
Hardening |
830 - 870°C |
oil or hot bath 180 - 220°C |
see tempering diagram |
Mechanical Properties
Hardness |
30 - 48 |
HRC |
Physical Properties
Thermal Expansion Coefficient |
12,1 - 12,7 / 12,3 - 13,5 |
1/K * 10-6 |
Thermal Conductivity (20°C) |
39,6 |
W/mK |
Density |
7,85 |
g/cm3 |
