W1 / C105W1
1.1545The 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
| Flag | Standard | Country | Grade | Number | Match |
|---|---|---|---|---|---|
| 🇺🇸 | AISI | USA | AISI W1 | T72301 | REF |
| 🇪🇺 | EN | Europe | C105W1 | 1.1545 | 100% |
| 🇯🇵 | JIS | Japan | SK3 / SK105 | — | 90% |
Sources: ASTM A686, EN ISO 4957, JIS G4401
Mechanical properties — Pro
Hardened Tempered
| Property | Value | Unit |
|---|---|---|
| Hardness HRC | ||
| Elastic Modulus | ||
| Density |
Annealed
| Property | Value | Unit |
|---|---|---|
| Hardness HB |
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