S9074-AQ-GIB-010/248 Rev 1
4-7.2 FILLER MATERIAL. a. Unless permitted by table 7-3, a change from a filler material listed under one A-number in table 7-2 to a material listed under another A-number or to any other material not listed (unless considered a part of a group in accordance with table 7-2, footnote 1). Table 7-3 allowances for one A-group to qualify another A-group filler material shall not apply where toughness testing would be required by table 7-7, footnote 2 for the latter A-group filler material (e.g., an HY-80 procedure qualified with MIL-10718-M does not cross qualify
welding of HSLA-65 with MIL-7018-M). b. For A-2C materials, the following apply:
(1) A change in flux/wire classification of lower specified tensile strength to a flux/wire classification with higher specified tensile strength (e.g., MIL-F-6XX-XXXXX to MIL-F-7XX-XXXXX or MIL-70S-X). (2) When joining base metals 1/2 inch and thicker having toughness requirements, a change in flux/wire classification with no toughness requirements to a flux/wire classification with toughness requirements. Also a change in flux/wire classification with toughness specified at a higher temperature to a flux/wire classification with toughness specified at a lower temperature. (3) A change from neutral to active flux and vice versa for multilayered weld deposits. c. For cladding and hardfacing, see 4-7.9.1.c and 4-7.9.1.d. d. For MIL-120 and MIL-140 series filler materials, see table 7-2, footnote 13. e. For tube-to-tubesheet welds, see 4-4.6.3. f. See table 7-2 citations of footnote 2. g. In the submerged arc process, a change in the type of flux used, except as permitted in table 7-2. h. In the plasma arc process, the addition or deletion of supplementary powdered filler metal. i. In the plasma arc process, a change in the form of filler metal from solid to fabricated wire, flux-cored wire, powdered metal, or vice versa. j. In plasma arc weld cladding or hardfacing, a change from a homogeneous powdered metal to a mechanical mixed powdered metal or vice versa. k. For tube-to-header seal welds in boiler components: (1) A change in electrode coating classification (e.g., MIL-XX15 to MIL-XX16 or MIL-XX18) and vice versa, or (2) An increase in electrode diameter of 1/32 inch or more from that qualified for any weld pass. l. In stud welding, a change in the nominal stud base diameter or shape of the stud at the section to be fused. Where stud shape at this section is not solid cylindrical, table 7-3 shall not apply (i.e., each different shape, size, and alloy shall require qualification, unless otherwise approved by NAVSEA, and the test method and application shall be as approved by NAVSEA). m. For weld cladding and hardfacing applications, when using the automatic, mechanized, or robotic gas tungsten arc or plasma arc processes, a reduction of 10 percent or greater in the filler wire (or powder) feed rate from that recorded in the procedure qualification record. n. For submerged arc processes, a change in the flux trade name when the flux is not classified in table 7-2. Also a change in the flux type (e.g., neutral to active and vice versa) for multilayer welds in S-1 or S-2 materials. o. For A-45 filler materials, see table 7-2, footnote 11. p. In plasma arc weld cladding or hardfacing, a change in the powdered metal particle size range recorded in the procedure qualification record. q. A change in manufacturer or manufacturer’s designation of electrodes for welding over primer per 4-4.1.12.
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