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ASTM A126 Standard
specification for gray iron castings for Valves, Flanges and Pipe
fittings
This specification covers three classes of
gray iron for castings for pipe fittings and flanges
Tensile Requirements
|
|
Class A |
Class B |
Class C |
|
Tensile strength, min, ksi (MPa) |
21 (145) |
31 (214) |
41 (283) |
|
ASTM A48 Equivalent grades |
NO. 25 |
NO.30, 35 |
NO. 40 |
The castings
shall be made in a workmanlike manner and the surface shall be free
of adhering sand, scale, cracks, and hot tears as determined by
visual examination.
A chemical
analysis shall be performed on each lot and shall conform to the
following requirements for phosphorus Max. 0.75% and sulfur Max.
0.15%.
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