Seamless Steel Pipes in Large Caliber for Gas Cylinders

Standards:

ASTM A519-------American Materials and Testing Institution Standard

Q/321088HGB3---Enterprise Standards of Jiangsu Chengde Steel Pipe Co., Ltd

GB18248-----------China National Standard

Steel Material: 4130X

Usage: Seamless steel tubes in large calibers for gas cylinders.

Type of pipe	Outer diameter		Walll thickness
Hot rolled seamless pipe	OD (mm)	tollerance	WT (mm)	tolerance
	559	±1.0%	17.0	0~+25%

Mechanical Properties:

standard	Steel grade	Tensile strength(Mpa)	Bend strength(Mpa)	Bend ratio	Elongation (%)	Impact energy Akv(J)	Hardness
Q/321088HGB3	4230X	725~865	485~735	≤0.85	≥20	-40℃≥40	195~269HB

Chemical composition:

standard	Steel grade	Chemical composition (%)
		C	Si	Mn	P	S	Cr	Ni	Cu	Mo	V
Q/3210 88HGB3	4130X	0.25~0.35	0.15~0.35	0.4~0.9	≤0.02	0.01	0.8~1.1	≤0.25	≤0.2	0.15~0.25	≤0.8

 

 

Type of pipe:Hot rolled seamless pipe

Outer diameter OD(mm):559+-1.0%

Wall thickness WT（mm）:17.0  0~+25%

 

Mechanical Properties:

Standard:Q/3210 88HGB3

Steel grade:4130X

Tensile strength(Mpa) 725~865

Bend strength(Mpa):485~735

Bend ratio<=0.85

Elongation (%)>=20

Impact energy Akv(J) : -40℃≥40degree centigrade

Hardness: 195~269HB

 

Chemical composition(%)Q/321088HGB3

Standard:4130X

Chemical composition(%):

C 0.25~0.35   Si 0.15~0.35  Mn:0.4~0.9  P<=0.02  S 0.01  Cr 0.8~1.1  Ni<=0.25   Cu<=0.2  Mo 0.15~0.25   V<=0.8

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