JIS G 3441 Carbon steel pipes for ordinary piping

JIS G3441 CARBON STEEL SEAMLESS TUBES

 

Standard: JIS G 3441

Application of JIS G 3441 Alloy Seamless Steel Tubes

Pipe ordered under this specification for machinery, automobiles and other machine parts.

Manufacturing Process of JIS G 3441 Alloy Seamless Steel Tubes:

By a seamless process: hot finished and cold finished (with annealed)

Details of JIS G 3441 Alloy Seamless Steel Tubes We can supply:

Manufacture:seamless pipe (hot finished and cold finished)

Size: O.D.: 15.0～114mm W.T.: 2～20mm

Grade: Class1, Class2, Class3

Length: 6M or specified length as required.

Ends: Plain End, Beveled End.

 

Grade and Chemical Composition (％)

Grade	C≤	Si	Mn	P≤	S≤	Cr	Mo
SCM 420TK	0.18~0.23	0.15~0.35	0.60~0.85	0.030	0.030	0.90~1.20	-
SCM 415TK	0.13~0.18	0.15~0.35	0.60~0.85	0.030	0.030	0.90~1.20	0.15~0.30
SCM 418TK	0.16~0.21	0.15~0.35	0.60~0.85	0.030	0.030	0.90~1.20	0.15~0.30
SCM 420TK	0.18~0.23	0.15~0.35	0.60~0.85	0.030	0.030	0.90~1.20	0.15~0.30
SCM 430TK	0.28~0.33	0.15~0.35	0.60~0.85	0.030	0.030	0.90~1.20	0.15~0.30
SCM 435TK	0.33~0.38	0.15~0.35	0.60~0.85	0.030	0.030	0.90~1.20	0.15~0.30
SCM 440TK	0.38~0.43	0.15~0.35	0.60~0.85	0.030	0.030	0.90~1.20	0.15~0.30
Note: 1. Ni as an impurity in various steel pipes does not exceed 0.25%, and Cu does not exceed 0.30%; 2. When the purchaser requests the analysis of the finished product, the allowable deviation is as specified in Table 3 of JIS G0321.

 

 

Tolerance of OD and W.T

Division	Tolerance on O.D		Tolerance on W.T
Class 1	D＜50m	±0.5 mm	S＜4mm	+0.6mm-0.5mm
	50mm≤D	±1%	S≥4mm	+1% -12.5%
Class 2	D＜50m	±0.25mm	S＜3mm	±0.3mm
	50mm≤D	±0.5%	S≥3mm	±10%
Class 3	D＜25m	±0.12mm	S＜2mm	±0.15mm
	40mm＞D≥25mm	±0.15mm
	50mm＞D≥40mm	±0.18mm	S≥2mm	±8%
	60mm＞D≥50mm	±0.20mm	Notes: tolerance on each wall thickness shall be rounded off to one decimal place in accordance with rule a JIS Z 8401
	70mm＞D≥60mm	±0.23mm
	80mm＞D≥70mm	±0.25mm
	90mm＞D≥80mm	±0.30mm
	100mm＞D≥90mm	±0.40mm
	D≥100mm	±0.50%
1. The OD tolerance of hot finish seamless steel pipe according to Class1 2. Quenched and tempered steel pipes according to 4 categories.

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