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40CrMnMo7

1.2311
tool_steelplastic_mold
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Pre-hardened plastic mold steel — delivered at 28-32 HRC, ready for machining without further heat treatment. The European equivalent of AISI P20. Cr-Mn-Mo composition for good through-hardenability in large sections. THE workhorse mold base material for injection molds, compression molds, and die casting dies. Good machinability, polishability, and photo-etchability. Used for mold frames, large injection molds, blow molds, and structural die components.

International equivalents

FlagStandardCountryGradeNumberMatch
🇺🇸AISIUSAAISI P20 (close)—REF
🇪🇺ENEurope40CrMnMo7 / 1.23111.2311100%

Sources: ASTM A681, EN ISO 4957

Chemical composition comparison (wt%)

Side-by-side: 40CrMnMo7 (EN ISO 4957) vs 40CrMnMo7 / 1.2311 (EN) (EN ISO 4957)

Element40CrMnMo7 (EN ISO 4957)40CrMnMo7 / 1.2311 (EN)Overlap
C—0.35–0.45%—
Si—0.2–0.4%—

Mechanical properties

Compatibility verdict

40CrMnMo7 and 40CrMnMo7 / 1.2311: 100% composition match

Related materials

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D2 / X155CrVMo12-1

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Premium 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.

🇪🇺 X155CrVMo12-1🇯🇵 SKD11🇨🇳 Cr12Mo1V1🇷🇺 Kh12MF

P20 / 40CrMnMo7

1.2311
plastic_mold

Pre-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.

🇪🇺 40CrMnMo7🇨🇳 3Cr2Mo🇯🇵 SCM440 (modified)
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