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ASTM A193/A193M-2019
Alloy-steel and stainless steel bolting for high temperature or high pressure service and other special purpose applications
Material Designation Chemical Composition (%)
A193 B16 (CrMoV)
Min
Max
A193 B5
Min
Max
A193 B6 (S41000) (410)
Min
Max
A193 B7 (CrMo)
Min
Max
A193 B8 Class 1 (S30400) (304)
Min
Max
A193 B6X (S41000) (410)
Min
Max
A193 B7M (CrMo)
Min
Max
A193 B8A Class 1A (S30400) (304)
Min
Max
A193 B8 Class 1D (S30400) (304)
Min
Max
A193 B8 Class 2 (S30400) (304)
Min
Max
A193 B8 Class 2B (S30400) (304)
Min
Max
A193 B8C Class 1 (S34700) (347)
Min
Max
A193 B8C Class 2 (S34700) (347)
Min
Max
A193 B8CA Class 1A (S34700) (347)
Min
Max
A193 B8M Class 1 (S31600) (316)
Min
Max
A193 B8M Class 1D (S31600) (316)
Min
Max
A193 B8M Class 2 (S31600) (316)
Min
Max
A193 B8MA Class 1A (S31600) (316)
Min
Max
A193 B8M2 Class 2B (S31600) (316)
Min
Max
A193 B8M3 Class 2C (S31600) (316)
Min
Max
A193 B8P Class 1 (S30500)
Min
Max
A193 B8P Class 1D (S30500)
Min
Max
A193 B8P Class 2 (S30500)
Min
Max
A193 B8PA Class 1A (S30500)
Min
Max
A193 B8N Class 1B (S30451) (304N)
Min
Max
A193 B8N Class 1D (S30451) (304N)
Min
Max
A193 B8N Class 2 (S30451) (304N)
Min
Max
A193 B8NA Class 1A (S30451) (304N)
Min
Max
A193 B8MN Class 1B (S31651) (316N)
Min
Max
A193 B8MN Class 1D (S31651) (316N)
Min
Max
A193 B8MN Class 2 (S31651) (316N)
Min
Max
A193 B8MNA Class 1A (S31651) (316N)
Min
Max
A193 B8MLCuN Class 1B (S31254)
Min
Max
A193 B8MLCuN Class 2 (S31254)
Min
Max
A193 B8MLCuNA Class 1A (S31254)
Min
Max
A193 B8MLCuN Class 1D (S31254)
Min
Max
A193 B8T Class 1 (S32100) (321)
Min
Max
A193 B8TA Class 1A (S32100) (321)
Min
Max
A193 B8T Class 2 (S32100) (321)
Min
Max
A193 B8R Class 1C (S20910)
Min
Max
A193 B8R Class 1D (S20910)
Min
Max
A193 B8RA Class 1C (S20910)
Min
Max
A193 B8S Class 1C (S21800)
Min
Max
A193 B8S Class 1D (S21800)
Min
Max
A193 B8SA Class 1C (S21800)
Min
Max
A193 B8LN Class 1 (S30453)
Min
Max
A193 B8LN Class 1D (S30453)
Min
Max
A193 B8LNA Class 1A (S30453)
Min
Max
A193 B8MLN Class 1 (S31653)
Min
Max
A193 B8MLN Class 1D (S31653)
Min
Max
A193 B8MLNA Class 1A (S31653)
Min
Max
A193 B8CLN Class 1 (S34751) (347LN)
Min
Max
A193 B8CLN Class 1D (S34751) (347LN)
Min
Max
A193 B8CLNA Class 1A (S34751) (347LN)
Min
Max
A193 B8ML4CuN Class 1 (S31730)
Min
Max
A193 B8ML4CuN Class 1D (S31730)
Min
Max
A193 B8ML4CuNA Class 1A (S31730)
Min
Max
For Reference Only