S9074-AR-GIB-010/278
TABLE V. Preheat and interpass temperature for welded nonferrous alloys.
Material group number
Material identification
Minimum preheat temperature °F
Maximum interpass temperature °F
Supplementary provisions for preheat and interpass temperature 1/
S-21 S-22 S-26
Aluminum and aluminum base alloys
60
-
Preheating may be used to control distortion and prevent cracking providing the preheat and interpass temperatures are supported by qualification tests. To prevent a reduction in resistance to stress corrosion cracking in alloys 5086 and 5456 temperatures between 150°F and 400°F should be avoided Preheating may be used to control distortion and prevent cracking providing the preheat and interpass temperatures are supported by qualification tests
Silicon- bronze
60
-
S-33
Copper- nickel
-
350
S-34
Preheating is not required
Aluminum- bronze Nickel- aluminum- bronze
300
-
-
S-35
-
-
Preheat is not mandatory. The preheat and interpass
temperatures used in qualifying the welding procedure shall be
S-36A
essential elements of that procedure to be applied in production welding.
See footnotes at end of table.
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