S9074-AQ-GIB-010/248 Rev 1
NOTES (continued): 3. The surface of the weld cladding shall be machined. The weld cladding shall then be VT and PT inspected per 4-5 to the criteria of note 4 prior to removal of macro-etch specimens and side bends. All of the following shall apply: (a) 3/16-inch minimum cladding thickness is required for destructive tests, unless the welding procedure is restricted to welds less than 3/16 inch thick; in this case, face bends shall be tested at the maximum allowed weld thickness in place of side bends. (b) Where required by note 5, also perform composition testing per note 6 at the minimum machined weld thickness and layer to be qualified (see note 2(b)). Where composition testing is not performed, the minimum qualified weld thickness and layers shall be per note 2(c). 4. VT acceptance criteria shall be per MIL-STD-2035 class I. PT acceptance criteria shall be per MIL-STD-2035 for weld overlay class 1 (finished machined surface). Macro-etch examination and side bending shall be in accordance with table 7-7, note 5(c) and, as applicable, 4-5.2.6 or 4-5.2.3. Submit macro-etch specimens (or photo macrographs of these specimens clearly showing the fusion zone) along with other procedure qualification test data for approval. 5. Composition testing shall be performed per note 6 where any of the following conditions apply: (a) Where composition or related testing of the clad surface is specified by the governing system or component specification or fabrication document. (b) For A-45 filler material clad welds. (c) For all other filler material clad welds, unless one of the following criteria are met and dilution testing is performed per note 7: (1) A minimum of three weld layers shall exist at the minimum finish machined production weld thickness to be qualified, which shall be at least 1/4 inch (see note 2(c)(1)), and dilution shall be less than 20 percent. (2) A minimum of two weld layers shall exist at the minimum finish machined production weld thickness to be qualified, which shall be at least 3/16 inch (see note 2(c)(2)), and dilution shall be less than 8 percent.
NOTE: The minimum final layer as required above shall be evident for at least 90 percent of the width of each macro test specimen, excluding rounding effects at specimen edges.
Alternate criteria may be approved by NAVSEA if satisfactory justification is provided. Dilution testing is only permissible where minimum qualified weld thickness and layers are as above and where the same welding parameters are used until the minimum number of qualified layers have been deposited. Where these conditions are not met, composition testing per note 6 shall be performed. 6. When required by note 5, composition testing shall be performed as follows: from a suitable portion of the test assembly near the center of clad weld width and the upper bend specimen location, machine the weld clad material down to the minimum clad thickness/layer to be allowed for production, and test the resultant cladding surface for material chemistry per notes (c) or (d), and (e) below. Tooling and lubricants used for machining the final surface should replicate that to be used in production to preclude contamination effects. Any distortion in the test assembly shall not increase the machined clad thickness for this test. The thickness tested/shown is the minimum finish machined production weld thickness qualified. Report this thickness, the number of weld layers at this thickness, and chemistry results along with other qualification test data. If necessary, etching shall be employed to discern the weld layer from which chemistry is obtained. The following shall also apply: (a) The depth from which the sample is taken shall be limited to the top 0.020 inch of weld cladding. (b) For qualified clad welds less than 3/16 inch thick, submit a cross-section photo macrograph (or macro-etch specimen) clearly showing the machined thickness and number of weld layers present in the area where the composition test was taken.
(Notes continued on next page.)
Figure 7-4. Test Assembly for Procedure Qualification for Cladding for Corrosion-Resistance (Also, See Figure 7-5 for Cylindrical Materials) - Continued
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