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

5.4.3.5 Fillet welds

Fillet weld size shall be as specified in the drawing and represents the minimum weld size (see TABLE IV).

TABLE IV.  Minimum fillet weld sizes.

Notes:

1/        Weld bead size is determined by the thinner member.

2/        Double side welds are welds made on both sides of the joint.

3/        Single side welds are welds made from only one side of the joint.

5.4.4 Weld quality

5.4.4.1 General

Cracks, incomplete fusion and overlap are not acceptable in any class of weld.  Two or more adjacent surface discontinuities shall be treated as one when the space between them is less than the dimension of the smallest discontinuity.  The dimension of any discontinuity shall be defined by its largest dimension.  Interconnecting discontinuities shall be considered as a single discontinuity.  Limits of discontinuity when specified in terms of percentage of thickness "T" shall be based on thinner member of the joints.  In the case of weldments with variations in cross section along the joint, "T" shall be considered to be the minimum thickness at the specific discontinuity location.  Arc strikes, arc burns from loose electrical connections and gouge marks on the base metal of the finished weldment are unacceptable for Class A and B welds.  Welds made from one side only under 0.125 inch thick may have the root surface faired in by using a

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