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 TABLE 2-1. Metals Preheating Chart
Metal
Recommended
Metal
Preheat
Designation
Group
Plain Carbon Steel - Below .20%C
Up to 200F
PLAIN
200F-300F
Plain Carbon Steel - .20-.30%C
CARBON
Plain Carbon Steel - .30-.45%C
300F-500F
STEELS
Plain Carbon Steel - .45-.80%C
500F-800F
300F-500F
Carbon Moly Steel -.10-.20%C
CARBON
400F-600F
MOLY
Carbon Moly Steel -.20-.30%C
500F-800F
STEELS
Carbon Moly Steel -.30 -.35%C
MANGANESE
Silicon Structural Steel
300F-500F
Medium Manganese Steel
300F-500F
STEELS
SAE T 1330 Steel
500F-800F
SAE T 1340 Steel
SAE T 1350 Steel
600F-900F
12% Manganese Steel
Usually not required
2-6
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