S9074-AR-GIB-010/278
Footnotes to table XVII
ASTM E 155. reference radiographs (films) shall be applied as specified. Reference films listed provide a basis for acceptability by comparison with production radiographs. Discontinuities shown in the reference film are acceptable in any unit area as defined below and may be accepted when discontinuities in production radiographs are concentrated in an area the size of the reference film (2 by 2 inches) provided the balance of the unit area is clear. The unit area shall be a square. 4 inches on each side. Areas less than a unit area shall be judged proportionately to the unit area. 1.
TABLE XVIII. RT acceptance criteria for steel (carbon. allov. and corrosion resistant). titanium. and titanium alloy castings.
Maximum severity level
ASTM standard 2
Thickness (inches)
Criticality Level 1
Hot tear, crack
Insert. chaplet
Shrinkage Porosity Inclusion
CA 2 CB 2 CC 2 CD 2 CA 3 CB 3 CC 3 CD 3 CA 4 CB 4 CC 4 CD 4 CA 3 CB 3 CC 3 CD 4 CA 4 CB 4 CC 4 CD 4 CA 5 CB 5 CC 5 CD 5
E 446
1
A 2
B 2
None None
2
E 446
Less than 1
None
A 3
B 3
3/ EA 2
E 446
3
None
3/ EA 2
B 4
A 4
1
E 446
None None
B 3
A 3
1 to 2
2
E 446
None
3/ EA 3
B 4
A 4
A 5
B 5
3/ EA 3
None
3
E 446
Original 114
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