Heat Treating of Springs
| Typical Heat Treatments for Springs After Forming | ||
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Spring Materials
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Spring Heat Treatment
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oC
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oF
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| Patented and Cold Drawn steel Wire |
190 - 230
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375 - 450
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| Tempered Steel Wire: | ||
| Carbon |
260 - 400
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500 - 750
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| Alloy |
315 - 425
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600 - 800
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| Austenitic Stainless Steel wire |
230-510
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450 - 950
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| Precipitation Hardening Stainless Wire (17-7PH): |
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| Condition C |
480 / 1 hour
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900 / 1 hour
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| Condition A to TH 1050 |
760 / 1 hour cool to
15o C followed by 565 / 1 hour |
1400 / 1 hour cool to
60o C followed by 1050 / 1 hour |
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| Monel: | ||
| - Alloy 400 | 300 -315 | 575 - 600 |
| - Alloy K500, Spring Temper | 525 / 4 hours | 980 / 4 hours |
| Inconnel: | ||
| - Alloy 600 | 400 - 510 | 750 - 950 |
| - Alloy X-750: | ||
| - - #1 Temper | 730 / 16 hours | 1350 / 16 hours |
| - - Spring Temper | 650 / 4 hours | 1200 / 4 hours |
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| Copper Base, Cold Worked (Brass, Phosphor Bronze, etc.) | ||
| Beryllium Copper: |
175 - 205
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350 - 400
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| - Pretempered (Mill Hardened) |
205
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400
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| - Solution Annealed, Temper Rolled or Drawn |
315 / 2-3 hours
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600 / 2-3 hours
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| Annealed Steels: | ||
| - Carbon (AISI 1050 to 1095) | 800 - 830* | 1475 - 1525* |
| - Alloy (AISI 5160 H 6150, 9254) | 830 - 885* | 1525 - 1625* |
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| * Time depends on heating equipment and section size. Parts are austenized then quenched and tempered to the desired hardness. | ||
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