S5 Tool Steel Data

S-5 is an oil-hardening silicon-manganese steel of medium carbon content especially adapted for punches, shear blades, chisels, and other shock resisting applications. S-5 is therefore applicable where the properties of silicon-manganese steels are desired in combination with well-known advantages of oil-hardening steels. A reduced tendency to distort or crack in heat treatment is accordingly combined with high toughness in S-5.

Note: K-mac does not sell this grade - Data is for reference only.

Carbon: .50 / .65

Manganese: .60 / 1.00

Silicon: 1.75 / 2.25

Tungsten: --

Molybdenum: .20 / 1.35

Chromium: .35 max.

Vanadium: .35 max.

Cobalt: --

Forging: Start forging at: 1850-2050°F (1010-1121°C) Do not forge below: 1600°F (871°C)

Normalizing: Do not normalize

Annealing: Temperature: 1425-1475°F (774-802°C) Rate of cooling, max. per hour: 25°F (14°C) Typical annealed hardness, Brinell: 192-229

Hardening: Rate of heating: Slowly Hardening temperature: 1400°F (760°C) Time at temperature, minutes: 5-20 Quenching medium: O

Tempering: Tempering temperature: 350-800°F (177-427°C) Approx. tempered hardness, Rockwell C: 50-60

Wear Resistance: Low to Medium

Toughness: Highest

Resistance to Softening Effect of Elevated Temperature: Low

Depth of Hardening: Medium

Machinability: Medium to High

Grindability: Medium to High

Distortion in Heat Treating: Medium

Safety in Hardening: High

Resistance to Decarburization: Low