Seamless Steel Tubes for Low and Medium Pressure (GB3087)

Product Details

Seamless Steel Tubes for Low and Medium Pressure (GB3087)


Model NO.:	GB3087

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Product Description

Application:
Mainly used for manufacturing superheated pipelines, the steam pipe, boiling water tube, flue tube, small flue tube, etc. Of low, mediam pressure boiler, locomotive boiler, the general industry boiler and the life boiler and so on(working pressure is not more than 5.88Mpa generally, operating temperature below 450o C).

Products can be also supplied according to the standard of ASTM A179, ASTM A192, ASTM A106, ASME SA179, SA192, ISO 9329-1, DIN 17175, JIS G 345, BS 3059.

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Pipe Types	Pipe S ize mm		Tolerances Standard
Hot rolled	OD D	≤159	±1.0%( Min±0.50mm)
	OD D	>159	±1.0%
	WT s	≤20	+15% -12.5%(Min +0.45mm –0.35mm)
	WT s	>20	±12.5%
Cold drawn	OD D	10~30	±0.40mm
		>30~50	±0.45mm
		>50	±1%
	WT s	<1.5~3.0	+15% -10%
	WT s	>3	+12.5% -10%

Mechanical Properties :

Grade	WT mm	Tensile Strength δb Mpa	Yield Strength σ0.2, Mpa	Elongation δ5, %
			≥
10	all	335~475	195		24
20	<15	410~550	245		20
	≥15		225

Steel pipe yield strength minimum value under the high temperature :

Grade	Test specimen condition	Temperature ºC
Grade	Test specimen condition	200	250	300	350	400	450
10	Goods supply condition	165	145	122	111	109	107
20	Goods supply condition	188	170	149	137	134	132

Chemical composition :

standard	grade	Chemical composition
standard	grade	C	Si	Mn	P	S	Cr	Mo	Cu	Ni	V
GB3087	10	0.07 ~ 0.14	0.17 ~ 0.37	0.35 ~ 0.65	≤0.035	≤0.035	≤0.15	/	≤0.25	≤0.25	/
GB3087	20	0.17 ~ 0.24	0.17 ~ 0.37	0.35 ~ 0.65	≤0.035	≤0.035	≤0.25	/	≤0.25	≤0.25	/