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 duplex stainless
60
400
S-10H
For all thicknesses.
-
-
-
S-11
See 6.5
Where consumable inserts are used, preheat temperatures for GTA root welding (tacking and consuming the insert) can be the temperatures established in approved welding procedure qualification tests. 1. Preheat and interpass temperatures for dissimilar metal welds, where specified temperatures for the different materials are not within the same range, shall be established by approved welding procedure qualification test except as provided for in footnote 3. 2. Where different combinations of S-1 S-3, S-3A, S-4, S-5, S-6, S-6A, and S-7 are welded the preheat temperatures shall be the higher required for the materials involved except as provided for in footnote 1. 3. These lower preheat temperatures are only permissible for SMAW when electrodes are specially procured to 0.03% maximum carbon content. Applicable welding procedures shall specify this requirement. Records required by 4.1.3 shall list the heat and lot number of all electrodes used with these lower preheat temperatures. A procedure for purchasing electrodes to this requirement and for segregating all such electrodes from high carbon content electrodes shall be developed by the activity and submitted for approval in accordance with 5.2.1 prior to use. 4. 5.The maximum interpass temperature for welding with all 410NiMo type filler materials shall be 500°F .
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