S9074-AR-GIB-010/278
TABLE IV. Preheat and interpass temperature for welded ferrous alloys. - Continued
Material group number
Material identification
Minimum preheat temperature °F 1/ , 2/ , 3/
Maximum interpass temperature °F
Supplementary provisions for preheat and interpass temperature
High alloy steel martensitic
400
-
For all S-6 materials except as permitted below
300
500
For 410 welded with 410NiMo For 410 welded with 410NiMo unless otherwise permitted below
200
500
S-6 5/
60 4/
500
For 410S welded by SMAW with 410NiMo, with 0.03% C maximum, or when using GMAW or GTAW for 410S with 410NiMo filler material
High alloy steel maternsitic
200
500
For all S-6A material except as permitted below
60 4/
500
For thickness less than 1.5 inches; and SMAW with 410NiMo electrode with 0.03% C maximum or when using GTAW or GMAW and 410NiMo filler material. Preheat is not mandatory - The preheat and interpass
S-6A
High alloy steel ferritic
-
-
temperature used in qualifying the welding procedure shall be am essential element of that procedure, to be applied in production welding Preheat and interpass temperature shall not exceed 350°F for all S- 8 materials except as provided for in footnote 2.
S-7
High alloy austenitic steel
-
350
S-8
See footnotes at end of table.
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