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40CrMnNiMo8-6-4 Plastic Mould Steel

40CrMnNiMo8-6-4 Plastic Mould Steel
Product Description
Chemical Composition - (Typical Analysis in %)

STANDARDSP20+NiDIN 273840CrMnNiMo8-6-4AISI P20+Ni

 

CSiMnPSCrNiMo
0.35-0.450.20-0.401.30-1.600.030max0.030max1.80-2.101.90-1.200.15-0.35

It has excellent hardening penetration and is specially used for Plastic injection die moulds. The characteristics of a material are right sharpening, photo-etching properties with high purity and good homogeneity. P20+Ni is upgraded version of plastic mold steel 0f 2311, which normally supply in Pre hardened condition. Hardness in as supplied condition 280-320 HB with having uniform hardness. It can be subject to a nitriding treatment to improve its wear resistance. Steel Properties:
  • P20+Ni is upgrade version of plastic mold steel 0f 2311, which normally supplied in Prehardened condition
  • Hardness in supplied condition is 280-320 HB
  • Additional nickel content of 1 % increases through hardening
  • It is micro-alloyed
  • Good machinability
  • Suitable for texturing
  • Outstanding Polishability
  • Corrosion resistance
  • Vacuum-degassed steel with the following excellent features.

Application:
P20 is equivalent grade of most popular steel grade of DIN 2738 which is applicable for large & small plastic mould dies for Automotive Industries, Dies for Domestic goods , High finishing plastic Die, Bolster Plates of Presses, Die Holders & Shoe blocks for drop Hammers, Press Cassettes , Upsetter Blocker, forging dies, Different dies & mold for plastic products etc.
Physical Properties:

Coefficient of Thermal Expansion at °C10¯⁶ m / (m*K)
20-10011.2
20-20012.8
20-30013.5
20-40013.7
20-50014.3
20-60014.7
20-70014.9

 

Thermal Conductivity at °CW / (m*K)
2035
35034
70033

 

Heat Treatment:

Soft Annealing °C710-740
CoolingFurnace
Hardness HBmax. 235
Hardening °C840-870
QuenchingPolymer or Oil
Hardness after quenching HRC51

 

Tempering°C after quenching100200300400500600700
HRC51.550.24846.2433929

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