Black carbon steel square tube

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Building Materials Factory Black Steel Square Tubes Carbon Steel Square Tubes/Hollow Profiles Square hollow profiles or square tubes are made of hot rolled, cold rolled, pre-galvanized or stainless steel cold formed and welded. In order to form a square steel profile, an appropriate parent tube, that is, a round steel tube, must first be formed. Rollers are used to gradually press the round tube into a square hollow section. This is all done inline.

Carbon steel square tube specifications

Name	Square tube carbon steel pipe black hollow section carbon steel Q235 square metal tube
Surface	Galvanized (200-220g/m2 usual,can be request by customer)
Material	Q195,Q215,Q235,Q345
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 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

Chemical composition and mechanical properties

Grade	Chemical Composition					Mechanical Properties
	C	Mn	Si	S	P	Yield	Tensile	Elongati
	C	Mn	Si	S	P	Strength Mpa	Strenth Mpa	-on %
Q195	0.06-0.12	0.25-0.50	≤0.30	≤0.045	≤0.05	≥195	315-430	≥33
Q235	0.12-0.20	0.30-0.67	≤0.30	≤0.045	≤0.04	≥235	375-500	≥26
Q345	≤0.20	1.00-1.60	≤0.55	≤0.04	≤0.04	≥345	470-630	≥22

production workshop

Application

Our steel products are mainly used in chemical industry, petrochemical industry, offshore, seawater pipeline, desalination plant, nuclear engineering, paper and pulp industry.

Oil and GasKuwait is a country of petroleum resources with abundant, oil factory also is very broad, respectively, the oil plant are mainly used for refining oil and oil processing.

MarineSubmarine pipelines carry such things as domestic water, waste water, electrical lines, gas lines, communication lines, and outfall or intake systems.

ConstructionBridge materials with high strength, low cost for selecting the main basis, give priority to with development of the traditional steel and concrete.

EnergyEngineering is mainly aiming at the water pollution and solid waste pollution. using the steel pipe to filtrate in order to improve the quality of water.

Our export country

We are a well known worldwide supply and export industrial pipe in following countries：,Italy, Philippines, France，Ireland, Portugal, Gambia, Thailand, Ukraine, United Kingdom, Netherlands, South Africa, Spain, Turkey, Libya, Romania, Puerto Rico, Azerbaijan, United Arab Emirates, Pakistan, Ghana, Slovakia, Germany, Saudi Arabia, Afghanistan, Bolivia, Switzerland, Bangladesh, Taiwan, Oman, Egypt, Greece, Norway, Singapore, Bulgaria, Estonia, Belgium, Yemen, Hong Kong, Ecuador, Sri Lanka, Nepal, Belarus, Finland, Gabon, Iran, Canada, Argentina, Lebanon.

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