P20 / 40CrMnMo7
1.2311Pre-hardened plastic mold steel (usually delivered at 28-34 HRC). The most widely used mold base steel globally. Good machinability in pre-hardened condition, good polishability. Used for injection molds, die-casting dies, extrusion tooling, and structural mold components.
International equivalents
| Flag | Standard | Country | Grade | Number | Match |
|---|---|---|---|---|---|
| 🇺🇸 | AISI | USA | AISI P20 | T51620 | REF |
| 🇪🇺 | EN | Europe | 40CrMnMo7 | 1.2311 | 100% |
| 🇨🇳 | GB | China | 3Cr2Mo | — | 90% |
| 🇯🇵 | JIS | Japan | SCM440 (modified) | — | 80% |
Sources: ASTM A681, EN ISO 4957, GB/T 1299, JIS G4105
Mechanical properties
Compatibility verdict
P20 / 40CrMnMo7 and 3Cr2Mo: 90% composition match
Related materials
X210Cr12
1.2080High-carbon high-chromium cold-work tool steel. Excellent wear resistance and dimensional stability after heat treatment. Used for blanking and forming dies, drawing mandrels, gauges, shear blades, and thread rolling dies. Not suitable for impact loading.
D2 / X155CrVMo12-1
1.2379Premium high-carbon high-chromium cold-work tool steel with vanadium and molybdenum. Air-hardening with minimal distortion. Superior wear resistance and edge retention. The global benchmark for cold stamping dies, blanking tools, shear blades, and forming tools.
H13 / X40CrMoV5-1
1.2344The most widely used hot-work tool steel globally. Excellent combination of hot hardness, toughness, and thermal fatigue resistance. Used for die-casting dies (aluminum, zinc, magnesium), forging dies, extrusion tooling, and hot shear blades.
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