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Material
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