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ASTM A320 Specifications
Mechanical Requirements
Grade Temperature
Range
Diameter (in) Minimum Yield
Strength (PSI)
Minimum Tensile
Strength (PSI)
L7 -50° F to 1100° F 1/4 to 2 1/2 100,000 125,000
L7M -50° F to 1100° F 1/4 to 2 1/2 80,000 100,000
B8 Class 1 Cryogenic to
1500° F
All 30,000 70,000
B8M Class 1 Cryogenic to
1500° F
All 30,000 70,000
B8 Class 2 Cryogenic to
1500° F
Up to 3/4 100,000 125,000
3/4 to 1 80,000 115,000
1 to 1 1/4 65,000 105,000
1 1/4 to 1 1/2 50,000 100,000
B8M Class 2 Cryogenic to
1500° F
Up to 3/4 95,000 110,000
3/4 to 1 80,000 100,000
1 to 1 1/4 65,000 95,000
1 1/4 to 1 1/2 50,000 90,000