JIS G 3445 STKM系列

機械構造用碳素鋼管

Carbon steel tubes for machine structure

種類(Grade)

種類記號(Grade symbol)

11種(Grade)

A

STKM11A

12種(Grade)

A

STKM12A

B

STKM12B

C

STKM12C

13種(Grade)

A

STKM13A

B

STKM13B

C

STKM13C

14種(Grade)

A

STKM14A

B

STKM14B

C

STKM14C

15種(Grade)

A

STKM15A

C

STKM15C

16種(Grade)

A

STKM16A

C

STKM16C

17種(Grade)

A

STKM17A

C

STKM17C

18種(Grade)

A

STKM18A

B

STKM18B

C

STKM18C

19種(Grade)

A

STKM19A

C

STKM19C

20種(Grade)

A

STKM20A