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W1 / C105W1

1.1545
tool_steelwater_hardening
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The simplest and cheapest tool steel — plain high-carbon steel with no significant alloy additions. Water-hardening with shallow hardening depth. Used for cold chisels, center punches, hand tools, scribers, woodworking tools, and simple cutting tools where only the surface needs to be hard.

International equivalents

FlagStandardCountryGradeNumberMatch
🇺🇸AISIUSAAISI W1T72301REF
🇪🇺ENEuropeC105W11.1545100%
🇯🇵JISJapanSK3 / SK105—90%

Sources: ASTM A686, EN ISO 4957, JIS G4401

Mechanical properties

Compatibility verdict

W1 / C105W1 and SK3 / SK105: 90% composition match

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