3087 Seamless Steel Tubes

Standard: GB3087 boiler tube.
Production process: hot rolling, cold rolling or cold dialing made Allowable deviation of outer diameter: D1±1.5%, minimum ± 0.75mm, D2±1.0%.Minimum + / - 0.50 mm.
Boiler pipe is mainly used to manufacture boiler superheater, reheater, water wall and other pipes.

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3087 Seamless Steel Tubes are carbon steel pipes produced under GB 3087 standards for low- and medium-pressure boilers, featuring tensile strength of 410–550 MPa and yield strength above 245 MPa. They offer excellent heat resistance up to 450 °C, making them ideal for boilers, heat exchangers, and high-temperature industrial pipelines.

Product Parameters

Material Grades	Mainly 10#, 20# carbon steel
Outer Diameter Range (OD)	10 mm – 426 mm
Wall Thickness Range (WT)	1.5 mm – 50 mm
Length	4 m – 12 m (customized lengths available)
Surface Condition	Smooth and clean, free from cracks, folds, delamination, or visible defects
Hardness	Typically ≤ 156 HB (Brinell)
Operating Temperature	Up to approximately 450 °C
Pressure Resistance	Suitable for systems up to 10 MPa and above
Testing Methods	Tensile test, hydraulic test, flattening test, flaring test, cold-bending test
Dimensional Tolerance	OD ± 1.5 % (min ± 0.75 mm) for hot-rolled tubes; OD ± 1.0 % (min ± 0.50 mm) for cold-drawn tubes.
End Finish	Plain end or beveled end according to customer requirements
Applications	Boiler tubes, superheaters, reheaters, economizers, heat exchangers, and industrial pipelines

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Mechanical Properties and Chemical Composition

Standard	Brand	Tensile strength(MPa)			The yield strength(MPa)			Elongation(%)
GB3087	20	410～550				≥245			≥20
C	Si	Mn	P	S	Cr	Mo	Cu	Ni	V
0.17～0.24	0.17～0.37	0.35～0.65	≤0.035	≤0.035	≤0.25	/	≤0.25	≤0.25	/

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