AISI Type 01

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A.I.S.I. TYPE O1

Typical Analysis

C

Mn

Si

Cr

V

Mo

.95

1.20

.30

.50

.20

.50

General Characteristics

Highly versatile and easy to handle in every respect, O1 has long been considered the general purpose tool room steel. Low hardening temperatures allow in-plant heat treatment even where facilities are limited, saving time and expense. Available in a wide variety of sizes and shapes, O1 is a practical selection for many tooling and maintenance applications.

Typical Applications

Blanking, forming, drawing, molding, trimming dies, spindles, thread gauges, collets and stamps.

Heat Treatment (degrees in Fahrenheit)

Forging

Annealing

Preheating

Hardening

Tempering

1925 to 1500

1400 to 1440

1200 to 1250

1450 to 1500

350 to 450

Effects of Tempering (Measured in Rockwell C)

As hardened

400 deg. F

600 deg. F

800 deg. F

1000 deg. F

63 to 65

61 to 63

55 to 57

48 to 50

39 to 41