20# Building Materials Black Seamless Steel Pipe And Tube

This 20# seamless steel pipe (GB/T 8163-2018 equivalent to ASTM A106 Gr.B) is a premium carbon steel tube solution for high-stress structural and mechanical applications.

Material & Standards
Steel Grade: 20# Carbon Steel (0.17-0.23% C content)
Compliance: GB/T 8163, ASTM A106/A53, EN 10210
Tensile Strength: ≥410MPa | Yield Strength: ≥245MPa

Dimensional Parameters
Outer Diameter: 21.3mm - 610mm (custom sizes available)
Wall Thickness: SCH 10 - XXS (2.0mm minimum)
Length: 6m/12m fixed, or random lengths (5.8m-7m)
Surface & Processing
Natural black oxide finish (mill scale retained)
Cold-drawn/hot-rolled seamless manufacturing
End options: Plain, beveled (37.5°), or threaded (BSPT/NPT)

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Tianjin Tianyingtai Steel Pipe Co., Ltd. is one of the most credible manufacturers and suppliers of 20# building materials black seamless steel pipe and tube in China. Welcome to consult the quotation and import cheap 20# building materials black seamless steel pipe and tube made in China here from our factory.

I.Product Basic Info:

Name	20# building materials Black seamless steel pipe and tube price
Surface	Bare,oiled,galvanized
Material	ASTM A106B, ASTM A53B, API 5L Gr.B, ST52, ST37, ST44 SAE1010/1020/1045,S45C/CK45,SCM435,AISI4130/4140
MOQ	5 tons for normal size and material
WT	As customer's requests
Payment terms	TT deposit + the balanced against BL copy / LC or 100% LC at sight
Trade terms	FOB,C&F,CIF,EXW
Length	fixed or random,as customer request.
End Treatment	Plain(can be beveled, threaded,punch,shrink,extension... )
Lead time	within 7 days from stock with 6m length (stock pipe with our factory name in Chinese),20-25 days for customized pipe according to the qty

2.Product Chemical Composition & Mechanical Properties :

Grade	Chemical Composition					Mechanical Properties
	C	Mn	Si	S	P	Yield	Tensile	Elongati
						Strength Mpa	Strenth Mpa	-on %
20#	0.21	0.37	0.25	0.006	0.019	≥480	275-300	21.5

3.Product standard test:

20#	ASTM A106B, ASTM A53B

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Typical Applications

Construction: Space frames, column supports

Mechanical: Hydraulic cylinders, bearing sleeves

Utilities: High-pressure steam lines, boiler tubes

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