AISI M35 Cobalt-Bearing High-Speed Steel
AISI M35 — 5 % Co M2 modification, hot hardness HRC 60 at 600 °C. Compare with M2 and M42 for high-speed slitter blades (>800 m/min).
Tag: tool steel
AISI M42 Cobalt-Bearing Super High-Speed Steel
AISI M42 (UNS T11342) — 8 % Co super HSS, HRC 65–69, hot hardness HRC 60–62 at 600 °C. Compare with M35 and T15.
AISI M50 High-Speed Steel for Bearings
AISI M50 (UNS T11350) — Cr-V-Mo HSS for bearings, HRC 64–66, low distortion. Compare with M2 for high-RPM cutting tools.
AISI O1 Oil-Hardening Cold-Work Tool Steel
AISI O1 (UNS T31501) — oil-hardening cold-work tool steel, HRC 58–64, low distortion. Compare with A2 and D2 for short-run tooling.
AISI T1 Tungsten High-Speed Steel
AISI T1 (UNS T12001) — original 18 % W tungsten grade, HRC 63–65. Compare with M2 and T15 for legacy tooling designs.
AISI T15 Cobalt Super High-Speed Steel
AISI T15 — Co-W-V super HSS (12 % W, 5 % V, 5 % Co), HRC 66–68. Compare with M42 and ASP2060 for the most abrasive substrates.