MIL-R-45774 Radiographic Inspection, Soundness Requirements For Fusion Welds In Aluminum And Magnesium Missile ComponentsThis specification covers the methods for defining soundness and freedom from defects of manual or automatic shielded inert gas arc welds in aluminum and magnesium as determined by radiographic inspection.

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Defect

Type

Reference

Radiographs

Standard I

Standard II

Standard III

Standard IV

Standard v

Porosity

1. Scattered

2. Linear

3. Isolated

Voids

A1-1  to  5

A2-1  to  3 (typical)

A3-1  to  2

SEE

SEE

u

0.50T Maximum

TABLE

TABLE (Figure  3)

0.50T Maximum

0.50T Maximum

II

III

0.50T Maximum

Cracks

1. Transverse

2. Longitudinal

3. Crater

B1-1

B1-2

B2-1

B2-2

B3-1

u

u u u u

u

u u u u

u

u u u u

u

B u u B

u

B u u B

Fusion

1. Incomplete

Penetration

2. Imperfect fusion at weld interface faying surface junction for fillet welds

3. Imperfect fusion at weld interface faying surface junction for butt welds with backup strips.

C1-1

C1-2

C2-1

C2-2

C2-3

C3-1

C3-2

u

u u u u u

u u

u

u u u u u

u u

See Figure 2 &               See Figure 2 &           See Figure 1, 2

Rule 1                             Rule 1                       & Rule 2

(Acceptance in accordance with reference radio-graphs) (See ASTM E 155 & ASTM E 505)

(Acceptance in accordance with reference radio-graphs) (See ASTM E 155 & ASTM E 505)

Foreign Materials

1. More Dense

2. Less   Dense

D1-1

D2-1

u

u

See Notes

See Notes

under-cutting

All

E1-1

0.10T

Maximum

0.10T

Maximum

0.10T

Maximum

0.10T

Maximum

0.10T

Maximum