Grade Composition Notes
O1.0.90% C, 1.0–1.4% Mn, 0.50% Cr, 0.50% W, 0.30% Si, 0.20% V
It is a cold work steel used for gauges, cutting tools, woodworking tools and knives. It can be hardened to 66 HRC, typically used at Rc61-63. Vanadium is optional. Also sold as Arne, SKS3, 1.2510 and 100MnCrW4.
O2.0.90% C, 1.5–2.0% Mn, 0.30% Cr, 0.30% Si, 0.15% V
It is a cold work steel used for gauges, cutting tools, woodworking tools and knives. It can be hardened to 66 HRC, typically used at Rc61-63. Also sold as 1.2842 and 90MnCrV8.
O3.1.45% C, 1.0% Mn, 1.0% Si, 0.3% Mo
It is a cold work oil-hardening, graphitic tool steel with outstanding resistance to metal-to-metal sliding wear and galling. APPLICATIONS: Thread gauges, master gages, cams, bushings, sleeves, meat granulator plates, arbors, forming rolls, shear blades, punches, dies, bar feed guides