DIN 1.2738 Alloy Tool Steel

Description:
This steel is in the category generally labeled as Plastic Mold Steels. Nickel and chromium are the alloying elements for hardness and toughness. Cold work tool steel with good machinability, excellent polishability, suitable for texturing. Improved through hardenability comapred to Mat. No.1.2311

3Cr2MnNiMo
Standard Chemical Composition(%)
Standard/Steel Grade C Si Mn Cr Mo Ni P S
GB 3Cr2MnNiMo 0.32-0.40 0.20-0.4 1.10-1.5 1.70-2.0 0.25-0.4 0.85-1.15 ≤
0.03 ≤
0.03
AISI 738/718 0.28-0.40　 0.20-0.8　 0.60-1.1　 1.40-2.0　 0.80-1.2　 0.80-1.20　 　 　
DIN 1.2738 0.30-0.45　 0.20-0.4 1.30-1.6 1.80-2.1 0.15-0.25　 0.90-1.20 　 　
JIS PDS5S 　 　


Physical properties:
Ac1=715°C、Ac3=770°C、Ms=230℃
Coefficient of linear expansion(20~200°C): 12.7×10K
thermal conductivity: 20°C, 29.0W/ (m•K), 200°C, 29.5W/ (m•K)

Heat treatment:
quenching 340~860°C, water, oil cooling ;
tempering 500 ℃, water, oil cooling.


Application:
Typically used for relatively low temperature applications such as die casting dies and injection molds, synthetic plastic moulds dies, for large moulds.