MIL-STD-2219 Fusion Welding for Aerospace Applications S/S by AWS-D17.1The scope of this document is to provide minimum requirements for weld filler materials, workmanship, inspection and record requirements for fusion welding of alloys applicable to aircraft, missiles, other aerospace equipment, their parts and accessories.

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MIL-STD-2219A

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cosmetic weld pass or by grinding, provided that complete penetration was obtained in the original weld. Preferential arc erosion of the heat affected zone on aluminum welds may be removed by lightly sanding or wire brushing followed by etching as specified in ASTM-E1417 prior to inspection.

5.4.4.2 Discontinuity limits

Discontinuities shall not exceed the limits of TABLE V.

5.4.4.3 Discoloration of titanium

Contamination resulting in discoloration of weld bead and the adjacent area is not acceptable except as follows:

a. For welds of all classes including HAZ, bright silver color is acceptable.

b. For Class A welds including zones up to 0.030 inches beyond the weld edges, silver to light straw color is acceptable but must be removed if additional welding is performed. Violet to blue or gray color contamination shall be cause for rejection of the weldment.

c. For Class B and Class C welds including zones out to 0.030 inches beyond the weld edges, silver to violet color is acceptable but must be removed if additional welding is performed. Blue color contamination is not acceptable if additional welding is performed. Blue color contamination is acceptable for the finished weld but must be removed. Gray color contamination shall be cause for rejection of the weldment.

d. Discoloration, except for gray color, is allowed in the base metal beyond the

0.030 limit, except that blue discoloration shall be removed.

e. Removal of superficial discoloration shall be in accordance with 5.3.5.8. f. Gray color comtamination shall be cause for rejection unless it can be

conclusively proven that embrittlement has not occurred, such as by

microhardness test or other direct tests.

5.4.4.4 Discoloration of 300-series corrosion resistant steel and carbon and low alloy steels

Tightly adhering iridescent temper films and light straw/tan discoloration on the finished weldment shall not be cause for rejection.