ASTM A126 Standard Specification
Today, we will introduce the ASTM A126 Standard specification for gray iron castings, such as valves, flanges and pipe fittings. This specification covers three classes of gray iron for castings, please see as the following chart.
Tensile Requirements of ASTM A126
|1.Class A||2. Class B||3. Class C|
|Tensile strength, min, ksi (MPa)||21 (145)||31 (214)||41 (283)|
|ASTM A48 Equivalent grades||NO. 25||NO.30, 35||NO. 40|
Castings should be manufactured in a manner similar to workers. In addition, the surface should be free of visible sand, scale, cracks and thermal cracks.
Chemical analysis should be carried out for each batch of products and should meet the following relevant content requirements: The maximum phosphorus content is 0.75%, and the maximum sulfur content is 0.15%.
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