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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Standard

Sheet Thickness (inches)

Average Diameter of Images (in inches) of

Individual Cavities  *

Average Distance (in inches) of Closest

Approach in 3 Linear  inches of Weld

I

All

None Acceptable

None Acceptable

II

<                    0.126

0.126    -        0.250

>                    0.250

0.0625  Minimum   -  0.094   Maximum

0.0312  Minimum  -  0.0469  Maximum

0.0469  Minimum  -  0.0625  Maximum

0.75

0.75

0.75

III

<                    0.126

0.126    -        0.250

>                    0.250

Same as Standard  II

0.50

0.50

0.50

IV

<                    0.126

0.126    -        0.250

>                    0.250

0.0625  Maximum

0.0625  Minimum    -    0.094  Maximum

0.0625  Minimum    -    0.125  Maximum

0.50

0.50

0.50

V

<                    0.126

0.125    -        0.250

>                     0.250

0.0625  Maximum

0.0625  Minimum    -    0.094  Maximum

0.0625 Minimum     -    0.125  Maximum

0.25

0.25

0.25