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ASTM A540 Specifications
Mechanical Requirements
Grade Class Temperature Range Diameter (in) Minimum Yield
Strength (PSI)
Minimum Tensile
Strength (PSI)
Maximum Tensile
Strength (PSI)
B21, B23, B24 1 Ambient to 700° F 1/4 to 4 150,000 115,000 165,000
B21, B23, B24 2 Ambient to 700° F 1/4 to 4 140,000 115,000 165,000
B21 to B24 3 Ambient to 700° F 1/4 to 6 130,000 115,000 165,000
B21, B23, B24 4 Ambient to 700° F 1/4 to 6 120,000 115,000 165,000
B21, B23, B24 5 Ambient to 700° F 1/4 to 2 105,000 115,000 165,000
2 to 8 100,000 115,000 165,000