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ASTM A320/A320M-2018
Alloy-steel and stainless steel bolting for low-temperature service
Material Designation Chemical Composition (%)
A320 L7
Min
Max
A320 L7M
Min
Max
A320 L70
Min
Max
A320 L7A
Min
Max
A320 L71
Min
Max
A320 L72
Min
Max
A320 L7B
Min
Max
A320 L73
Min
Max
A320 L7C
Min
Max
A320 L43
Min
Max
A320 L1
Min
Max
A320 B8 Class 1 (S30400) (304)
Min
Max
A320 B8 Class 2 (S30400) (304)
Min
Max
A320 B8A Class 1A (S30400) (304)
Min
Max
A320 B8C Class 1 (S34700) (347)
Min
Max
A320 B8C Class 2 (S34700) (347)
Min
Max
A320 B8CA Class 1A (S34700) (347)
Min
Max
A320 B8T Class 1 (S32100) (321)
Min
Max
A320 B8T Class 2 (S32100) (321)
Min
Max
A320 B8TA Class 1A (S32100) (321)
Min
Max
A320 B8P Class 1 (S30500)
Min
Max
A320 B8P Class 2 (S30500)
Min
Max
A320 B8PA Class 1A (S30500)
Min
Max
A320 B8F Class 1 (S30300) (303)
Min
Max
A320 B8F Class 2 (S30300) (303)
Min
Max
A320 B8FA Class 1A (S30300) (303)
Min
Max
A320 B8FSe Class 1 (S30323) (303Se)
Min
Max
A320 B8FSe Class 2 (S30323) (303Se)
Min
Max
A320 B8FASe Class 1A (S30323) (303Se)
Min
Max
A320 B8M Class 1 (S31600) (316)
Min
Max
A320 B8M Class 2 (S31600) (316)
Min
Max
A320 B8MA Class 1A (S31600) (316)
Min
Max
A320 B8LN Class 1 (S30453)
Min
Max
A320 B8LNA Class 1A (S30453)
Min
Max
A320 B8MLN Class 1 (S31653)
Min
Max
A320 B8MLNA Class 1A (S31653)
Min
Max
A325 Type 3 E
Min
Max
For Reference Only