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Steel Tech - S7 Tool Steel |
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Written by Franklyn D. Garland
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S-7 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
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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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