Similar Steel Grade-DIN1.2510, JIS SKS3, GB 9CrWMn

Chemical Composition (%)

AISI O1 Cold Work Tool Steel is the original oil-hardening, “non-shrinking” tool steel .It is a general-purpose tool steel that is typically used in applications where alloy steels cannot provide sufficient hardness, strength, and wear resistance.

Good combination of high surface hardness and toughness after hardening and tempering.

Vacuum refining, with pure steel quality

Spheroidal annealing to soften the tissue for easy cutting and processing

Very high hardness in case of quenching

Very good size stability after tempering


Widely applied in fabrication of blanking die, punching die, bending die and burnishing die with the thickness of not more than 8mm

Also widely applied in fabrication of gauges, measuring tools, woodwork cutters and lathe thimble,