China Supply Square Welded Carbon Steel Black Hollow Section Rectangular Standard Size

Carbon Steel Square Tube is made up of different grades of carbon steels and in square cross sections. These tubes are used in structural engineering to form structures. The Low-carbon Steel Square Tubes are used in applications where high ductility is expected. The application is seen mostly in the construction industry.  There are added options for the tubes such as high precision laser cutting, saw cutting, galvanizing, hole punching and bending. The Cs Square Tubing contains carbon, manganese, phosphorus, sulfur and silicon depending on the grade of the steel. The tensile and yields strength are average and the toughness is high. The Carbon Steel Astm A53 Square Tube  has increased uniform strength, cost efficiency, recyclable, fire resistance, and high torsion strength. The material will not wrap under pressure. These grades have yield strengths up to 35ksi and tensile strengths up to 60ksi. The Carbon Steel A160 Square Tubes can range from ½ inches to 12 inches in outer diameters. The wall thickness of the pipes can range from 1.2mm to 12mm. the material can have different schedules and can come as seamless, galvanized and in various shapes.They can be produced as seamless, ERW, welded or fabricated.

Product	SS400 STKR400 Ms Steel Seamless Square Rectangular Pipe Hollow Section Tube/Pipe
Side Width/Height	20mm-600mm
Thickness	0.6mm-15mm
Length	1-12meter/pc
Producing Standard	ASTM A500,JG 178-2005,JIS G3466,EN10210 GB/T6728-2002,GB/T6725-2002, GBT3094-2000,or according to technical protocol
Main Material	ASTM A53,ASTM A106 ASTM A210,ASTM A283,ST33, ST37-2,ST52, DIN1626,DIN1629,STPY41,G3452,G3457, S235,S355, Q195-Q235,Q345,20#, alloy steel etc.
Technology	Seamless; Or With seam
Surface treatment	Paint oil; Varnish; Galvanized; Or according to customer's requirements.
Package	Tied with steel trips, then wrapped by plastic material. Or according to customer's requirements.
Usage	Widely used in mechanical manufacture, construction field, metallurgy industry, farm vehicles, agriculture greenhouse, automotive industry, railway, highway guardrail, container frame, furniture, decoration, steel structure etc.

• Urban / civil building pipeline

• Machine structure pipe

• Agricultural equipment pipeline

• Water gas pipeline

• Greenhouse pipe

• Scaffold pipe

• Building material

• Furniture pipe

• Low pressure fluid pipe

• Vehicle manufacturing

• Mechanical parts

FAQ：

Q: What kind of work does your company do?

A: We are a business steel industry and trade.We mainly produces carbon steel plate/pipe/coil/bars, etc.

Q: What are the advantages of your company?

A: (1): Prime quality and Competitive price.

    (2): Excellent experiences with after-sale service.

    (3): Every process will be checked by responsible QC which insures every product's quality.

    (4): Professional packing teams which keep every packing safely.

    (5): Samples can be provided as your requirements.

Q: What is your terms of payment ?

A: Can be negotiated by both parties. If you have another question, pls feel free to contact us as below.

Q: What about your price?

A: Our price is very competitive.

    Pls feel free to contact us if you are interested in our products.

Q: How long is your delivery time?

A: Different products have different delivery time. The products will be delivered as soon as possible on the basis of the quality assurance. Usually the delivery time is within 5-15 days after we received your balance.