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 TABLE 2-1. Metals Preheating Chart (Continued)
Metal
Metal
Recommended
Designation
Group
Preheat
NICKEL STEELS
SAE 2015 Steel
Up to 300F
200F-300F
SAE2115 Steel
200F-400F
2-1/2% Nickel Steel
SAE2315 Steel
200F-500F
200F-500F
SAE 2320 Steel
SAE 2330 Steel
300F-600F
SAE 2340 Steel
400F-700F
MEDIUM NICKEL
SAE3115 Steel
200F-400F
300F-500F
SAE 3125 Steel
CHROMIUM STEELS
SAE 3130 Steel
400F-700F
SAE 3140 Steel
500F-800F
SAE 3150 Steel
600F-900F
SAE 3215 Steel
300F-500F
500F-700F
SAE 3230 Steel
700F-l00F
SAE 3240 Steel
900F-1100F
SAE 3250 Steel
500F-700F
SAE 3315 Steel
2-8
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