ASTM A126 GRAY IRON CASTINGS VALVES FLANGES PIPE FITTINGS

ASTM A126 specification covers three classes of gray iron for castings intended for use as valve pressure retaining parts, pipe fittings, and flanges.

One tension test shall be performed on each lot and shall conform to the following mechanical properties table.

Tensile Requirements
  Class A Class B Class C
Tensile Strength, min,
ksi (MPa)		 21 (145) 31 (214) 41 (283)

Reference:

  • ASTM A126, Standard Specification for Gray Iron Castings for Valves, Flanges, and Pipe Fittings