|S7 Shock Resisting Tool Steel |
Technical Data Sheet
S7 is a shock-resisting tool steel with excellent impact properties. Because it is an air-hardening steel, it is safe and stable in heat treatment. S7's most important characteristic is its versatility. It is used widely for medium cold work tools and dies, for plastic-molding dies, shear blades, medium hot work dies, master hobs, and for component parts of many products. S7 is the benchmark shock resisting tool steel.
TYPICAL CHEMISTRY: C 0.50 Si 0.25 Mn 0.70 Cr 3.25 Mo 1.40
MACHINABILITY When properly annealed, S7 has a machinability rating of 70 as compared to a 1% Carbon Steel rated at 100.
DIMENSIONAL STABILITY : When air quenched from the proper hardening temperature, this grade can be expected to expand approximately .001 in. per in. Note: Distortion (bending, bowing and twisting) and part geometry can add to the variations in movement of a part being hardened.
THERMAL CYCLING : In order to avoid decarburization, this grade should be annealed and/or hardened in a controlled atmosphere, vacuum, or neutral salt furnace environment.
The values shown in this data sheet are to be used as a guide for estimating purposes only.
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