Oil-hardening, general purpose tool steel that holds its size and shape with excellent accuracy when being heat treated. While not as strong or wear resistant as A-2 or D-2, it experiences significantly less distortion during the heat treating process. Typically used in rolls, punches, shear knives, food processing knives, and gauges.
Oil hardening tool steels tend to experience less distortion during the quench operation, but they do still show distortion from the original size. The hardening operation is more thorough than with water hardening steels, but not as thorough as the air-hardening grades.
Physical Properties O1
Ultimate Tensile Strength
Yield Tensile Strength
Hardness Rockwell | Brinell
B88-95 | 177-212
Elongation at Break Percentage
Modulus of Elasticity
1.1 x 10^-1 BTU/lb-°F
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