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Alloy Steel Castings Tables 9
| TABLE 9 - Minimum Preheat Temp. |
| GRADE |
Minimum Preheat Temp. oF |
| Moly-Telastic |
300oF* |
| No. 1 Gearalloy |
350oF |
| No. 2 Gearalloy |
200oF |
| No. 3 Gearalloy |
350oF |
| No. 4 Gearalloy |
400oF |
| No. 6 Gearalloy |
400oF |
| * In most instances, a 300oF minimum preheat is sufficient. |
| Higher preheat temperature is not necessary unless extensive welding is required. |
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