O1 Tool Steel
Oil-hardening cold-work tool steel. Known for good durability, excellent wear resistance, and ability to hold a keen cutting edge. The most widely used general-purpose tool steel.
- Equivalents
- SKS3 (JIS), AISI O1
- Standard
- BS EN ISO 4957
- Hardness
- 57–62 HRC
- Sizes
- 3mm – 250mm
- Applications
- Press tools, Gauges, Jigs & fixtures, Taps & reamers, Punches, Woodworking tools
- Heat treatment
- Harden: 790–820°C, oil quench. Temper: 150–300°C.