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Metal Alloys |
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Steels |
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| AISI 8640 | |
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| Conditions | Hardness | ||
| T (°C) | Treatment | Method | Value |
| 25 | oil quenched, fine grained, tempered at 205°C | HB | 505 |
| 25 | oil quenched, fine grained, tempered at 315°C | HB | 460 |
| 25 | oil quenched, fine grained, tempered at 425°C | HB | 400 |
| 25 | oil quenched, fine grained, tempered at 540°C | HB | 340 |
| 25 | oil quenched, fine grained, tempered at 650°C | HB | 280 |
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