S9074-AR-GIB-010/278
TABLE XIII. Category 1 non-pressure containing castings in machinery or pressure vessels 1/ Continued
NDT Requirements
Stress level percent of yield
5/ 6 Weight
Sub Cart
Stress due to
Application Rules
Sub Cat
MT/P T2
R T
VT
x
x
x
D1
>100 lbs
>2/3
Dynaminc 4/ 7 loads or Hi impact shock grade A
x
>100 lbs and
-
D2
x
Other than A, B and C
D
2/3 and <
x
All
-
-
D3
Static 8/ load
-
-
x
All
All
D4
1.
This table does not apply to castings used in components and accessories covered by sections 14. 15. and 16 in which the NDT requirements are specifically listed for the castings involved. MT or PT is required for ferrous castings. PT is not required for nonferrous castings. Ship propellers shall be subjected to VT with PT used only as an aid in locating discontinues as specified in MIL-STD-2035 (RI not required). For purposes of clarification. castings stressed by dynamic loads are castings with areas which are designed for normal service dynamic loads of a degree and frequency that such loads are used in the strength equations which determine dimensions of the area (note: Hi impact shock is not a dynamic load for purposes of this rule). Weight' is design weight (when design weight is not calculated, actual weight of finished part may be used).
2. 3.
4.
5.
6. 7.
All weights of aluminum shall be subjected to RT and VT (PT not required).
Includes static or dynamic loaded castings in weight handling equipment where . the stress level under maximum test conditions exceeds 2/3 percent of the minimum specified yield strength of the material.
8.
Except for static loaded castings addressed by footnote 7.
Original 107
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