JIS G 3445 Grade STKM 11A Specification

JIS G 3445 Carbon Steel Tubes are manufactured as per JIS Specification .JIS G 3445 Seamless Tubesmechanical properties can be varied greatly by heat treating. JIS G3445 STKM Specification Covers Carbon steel tubes for machine structural purposes. We offer JIS G3445 available grades STKM11A, STKM12(A,B,C), STKM13(A,B,C), STKM14(A,B,C), STKM15,STKM16 STKM17,STKM18,STKM19,STKM20. and a diverse range of finish options to meet the performance and appearance requirements for most applications.

 

Standard Specification

 

Standard	JIS G3445
Grade	STKM11,STKM12,STKM13,STKM14,STKM15,STKM16,STKM17,STKM18,STKM19,STKM20
Outer Dimensions	19.05mm – 114.3mm
Wall Thickness	2.0mm – 14 mm
Length	max 16000mm

 CHEMICAL COMPOSITION

 

GRADE		DESIGNATION		CHMEMICAL COMPOSITION
			C	SI	MN	P	S
11	A	STKM 11A	0.12 max.	0.35 max.	0.60 max.	0.040 max	0.040 max
	A	STKM 12A
12	B	STKM 12B	0.20 max.	0.35 max.	0.60 max.	0.040 max	0.040 max
	C	STKM 12C
	A	STKM 13A
13	B	STKM 13B	0.25 max.	0.35 max.	0.30~0.90	0.040 max	0.040 max
	C	STKM 13C
	A	STKM 14A
14	B	STKM 14B	0..30 max.	0.35 max.	0.30~1.00	0.040 max	0.040 max
	C	STKM 14C
15	A	STKM 15A	0.25~0.35	0.35 max.	0.30~1.00	0.040 max	0.040 max
	B	STKM 15B
16	A	STKM 16A	0.35~0.45	0.40 max.	0.40~1.00	0.040 max	0.040 max
	B	STKM 16B
17	A	STKM 17A	0.45~0.55	0.40 max.	0.40~1.00	0.040 max	0.040 max
	B	STKM 17B
	A	STKM 18A
18	B	STKM 18B	0.18 max.	0.55 max.	1.50 max	0.040 max	0.040 max
	C	STKM 18C

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