P20 tool steel differs from area to area in the different countries.Europeans generally use the DIN spec-DIN EN ISO 4957standard materials (1.2311 and 1.2312), while in Japan steel industry standard, PX5 is the new standard P20. And the Americas Countries, Grade steel P20 is the most and wide used steel grade material. In China, 3CrM2Mo is the P20 steel grade equivalent, which is in the standard GB/T 1299 tool steel specification.
AISI P20 tool steels are nitrided or carburized. These P20 mold steel materials steels are capable of being machined into complex and large dies and molds. Material P20 steel plate and round bars are mostly used in the carburized condition. The presence of chromium and nickel enhances the toughness and hardness of mold steel P20 grade material.
1. Supply Range of P20 Steel
Round Bar: diameter 200mm – 1000mm
Steel Plate: thickness 16-100mm x width 200-2000mm
Surface Finish: Black, Rough Machined, Turned or as per given requirements.
2. Relevant P20 Tool Steel Specification and Equivalent Steel Grades
| Country | USA | German | GB/T |
| Standard | ASTM A681 | DIN EN ISO 4957 | GB/T 1299 |
| Grades | P20 | 1.2311 | 3Cr2Mo |
3. AISI P20 Steel Plate Materials
| ASTM A681 | C | Mn | P | S | Si | Cr | Mo | |||||
| P20 | 0.28 | 0.4 | 0.6 | 1 | 0.03 | 0.03 | 0.2 | 0.8 | 1.4 | 2 | 0.3 | 0.55 |
| DIN ISO 4957 | C | Mn | P | S | Si | Cr | Mo | |||||
| 1.2311 | 0.35 | 0.45 | 1.3 | 1.6 | 0.03 | 0.03 | 0.2 | 0.4 | 1.8 | 2.1 | 0.15 | 0.25 |
| GB/T | C | Mn | P | S | Si | Cr | Mo | |||||
| GBT 1299 | 0.28 | 0.4 | 0.6 | 1 | 0.03 | 0.03 | 0.2 | 0.8 | 1.4 | 2 | 0.3 | 0.55 |
4. ASTM P20 Mold Tool Steel Properties
sical Properties
P20 Steel Mechanical Properties
| Properties | Metric |
| Hardness, Brinell (typical) | 300 |
| Hardness, Rockwell C (typical) | 30 |
| Tensile strength, ultimate |
