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You are here : section steel--Katalor steel > News > 正文GB5310 Grade 20G Seamless Steel Boiler Pipe Factory

GB5310 Grade 20G Seamless Steel Boiler Pipe Factory

20G is the steel material of GB 5310- 2008. Grade 20G Seamless Steel Boiler Pipe is applicable to seamless tubes for making steam boiler whose pressure is high or higher and seamless tubes used as pipelines.

Grade 20G Steel pipe Application

For Manufacture heating-pipelines, containers, coal-saving devices, super heaters and reheaters of high pressure boiler

Chemical Compositions(%) of 20G：

Chemical elements	Data
Carbon	0.17-0.24
Silicon	0.17-0.37
Manganese	0.70-1.00
Phosphorus(max)	0.03
Sulfur(max)	0.03
Chromium(max)	0.25
Molybdenum(max)	0.15
Cuprum(max)	0.2
Nickel(max)	0.25
Vanadium(max)	0.08

The W.T. tolerance of 20G：

W.T.(S)		Tolerance of W.T.
<3.5		+15%(+0.48mm min)
		-10%(+0.32mm min)
3.5-20		+15%,-10%
>20	D<219	±10%
	D≥219	+12.5%,-10%

GB5310 Grade 20G Inspection and Test:

Chemical Composition Inspection Mechanical Properties Test (Tensile Strength, Yield Strength, Elongation, Flaring, Flattening, Bending, Hardness, Impact Test) Surface and Dimension Test No-destructive Test Hydrostatic Test

Shanghai Katalor Enterprises Co., Ltd is specialized in supplying GB5310 Grade 20G Seamless Steel Boiler Pipe. Besides that, Shanghai Katalor Enterprises Co., Ltd is also a manufacture, so we could promise the delivery time and the competitive price compared with other company. We sincerely hope new and regular customers come to visit our mill and inquiry GB5310 Grade 20G from Katalor.