MIL-W-47091 Welding, Arc And Gas; For Fabricating Ground Equipment For Rockets And Guided MissilesThis specification covers electric arc and gas welding of metallic members in ground handling equipment for rockets and guided missiles.

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MIL-W-47091A (MI)

magnesium alloy welding rod having the composition as specified in AWS A5.19 and

Table I shall be used (see 6.2).

TABLE I. Composition of Magnesium Alloy Welding Rods.

Percent

Materials

Not less than

Not greater than

Aluminum Zinc Manganese Silicon

Other elements

Magnesium

2.5

0.7

0.20

Remainder

3.5

1.3

0.05

0.30

3.3.3.2 M-1 and similar alloys. For welding magnesium alloys corresponding to or similar to those specified in AMS4375H, 4376E and 4377F, a magnesium alloy welding rod having the composition as shown in table II shall be used (see 6.2).

TABLE II. M-1 Magnesium Rod Composition.

Percent

Materials

Not less than

Not greater than

Manganese

Silicon Other elements Magnesium

1.2

Remainder

0.30

3.3.4 Type IV welding corrosion resistant steel.

3.3.4.1 Electrodes for metallic arc welding. For welding AISI types 347 and

321 or equivalent corrosion resistant or stainless steel by the metallic arc method, electrodes shall be AISI type 347 stainless steel or equivalent.

3.3.4.2 Rod for inert gas shielded arc welding. For welding AISI types 347 and 321 or equivalent corrosion resistant or stainless steel by the inert gas shielded arc method, the rod shall be AISI type 347 bare wire.

3.4 Location and direction of welds. The location of the welds and direction of welding shall be as specified on the applicable design drawing in accordance with the symbols established in Chapter 6 of AWS WHB-1.

3.5 Cleaning of welds.