TEMPERING TABLE
Temperatures
in Degrees
Fahrenheit Rockwell
Hardness
(C scale)

As Hardened	59-61
300	57-59
400	55-57
500	53-55
600	52-54
700	51-53
800	51-53
900	51-53
1000	50-52
1100	43-48
1200	37-40

S-7 is one of those hot work/cold work steels that many smiths "forge and forget" It can be difficult to find scrap sources of S-7, but it is readily available from steel suppliers and well worth the cost.

Author's Notice:
References for this article are from, but not limited to, the material specification sheets from Carpenter Technology Corporation, Steel Division and lecture material from Robb Gunter's 1994 ABANA conference demonstration on scrap tool steels.

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Copyright 1994, 1995 ArtMetal

Author: Franklyn Garland
HTML Editor: Roger Schmitt
ArtMetal Editor/Curator: Enrique Vega
Last Updated: 01/19/2012