Chemical Composition - (Typical Analysis in %)
STANDARDS | P20+Ni | DIN 2738 | 40CrMnNiMo8-6-4 | AISI P20+Ni |
C | Si | Mn | P | S | Cr | Ni | Mo |
0.35-0.45 | 0.20-0.40 | 1.30-1.60 | 0.030max | 0.030max | 1.80-2.10 | 1.90-1.20 | 0.15-0.35 |
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:
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 °C | 10 ¯ m / (m*K) |
20-100 | 11.2 |
20-200 | 12.8 |
20-300 | 13.5 |
20-400 | 13.7 |
20-500 | 14.3 |
20-600 | 14.7 |
20-700 | 14.9 |
Thermal Conductivity at °C | W / (m*K) |
20 | 35 |
350 | 34 |
700 | 33 |
Heat Treatment:
Soft Annealing °C | 710-740 |
Cooling | Furnace |
Hardness HB | max. 235 |
Hardening °C | 840-870 |
Quenching | Polymer or Oil |
Hardness after quenching HRC | 51 |
Tempering °C after quenching | 100 | 200 | 300 | 400 | 500 | 600 | 700 |
HRC | 51.5 | 50.2 | 48 | 46.2 | 43 | 39 | 29 |
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