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

w/CHANGE 1

5.4.3 Weld configuration

5.4.3.1 Weld reinforcement and weld width

Weld reinforcement shall fair smoothly with itself and the base metal.  When machine welding is required by drawing callout, weld reinforcement "R" for Class A and B groove welds shall not exceed the limits of ! T or 0.030 inch, whichever is the greater, for material thicknesses 0.375 inches and under.  For material greater than 0.375 inches

the maximum reinforcement shall be 0.125 inch.  When machine welding is not required by drawing callout, requirement for weld reinforcement "R" for Class A and B welds

shall not exceed the limits as follows:

a.   For material up to 0.125 inch thick - 1 T maximum.

b.        For material 0.125 inch to 0.510 inch thick - ! T or 0.100 inch whichever is greater.

c.    For material 0.510 inch and thicker - 0.170 inch maximum.

Typical examples of weld reinforcement profiles are indicated in FIGURE 5.  Width of each bead of a single or multi-pass weld shall not exceed 0.625 inches for GTAW, GMAW, FCAW, SAW and PAW.  For SMAW width of weave bead shall not exceed 2½ times the core diameter of electrode being used.

5.4.3.2 Weld penetration

Groove welds in joints welded from only one side without a backing strip shall show complete joint penetration as evidenced by the absence of a joint line on the other side which exceeds the discontinuity limit for incomplete penetration in TABLE V (see FIGURE 6a).  The backing strip, when required, shall be penetrated so as to ensure complete joint penetration and fusion of the root edges of the joint (see FIGURE 6b).

5.4.3.3 Melt-through

Where the welding symbol requires full penetration; overlap, flare, flange or corner joints shall be melted down so that complete joint penetration is obtained, and the resulting weld shows no evidence that the details were joggled, flared or flanged.  Typical

overlap, flare, edge-flange, and corner welds are shown in FIGURE 7.  Maximum root side reinforcement is as follows:

a.   For material up to 0.125 inch thick - 1 T maximum.

b.        For material 0.125 inch to 0.510 inch thick - ! T or 0.100 inch whichever is greater.

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