carbon steel square pipe/rectangular tube

Short Description:

Square and rectangular pipe is a name for square pipe and rectangular pipe, that is, steel pipes with equal and unequal side lengths. It is made of strip steel that has been processed and rolled. Generally, the strip is unpacked, flattened, coiled, welded to form a round tube, and then rolled into a square tube from the round tube and then cut to the required length. Future Metal produces carbon steel pipes and carbon steel square pipes & rectangular tube of different specifications, supports customization of various sizes and standards, such as: astm a106 pipe,seamless carbon steel pipe,a106 pipe,astm a53 pipe,cs pipe,low carbon steel pipe,black mild steel pipe,high carbon steel pipe,mild carbon steel pipe etc. and has been exported to more than 50 countries and regions such as Chile, Mexico, United Arab Emirates, South Africa, Kenya, Singapore, Brazil, France, etc. , the factory has carbon steel tube for sale in stock, if you buy carbon steel pipe&tubeplease contact us !

Product Detail

Product Tags

According to the production process, square and rectangular pipes are divided into: hot-rolled seamless square pipes, cold rolled seamless square pipes, extruded seamless square pipes, and welded square pipes.

Among them, the welded square tube is divided into
1. According to the process - arc welded square tube, resistance welded square tube (high frequency, low frequency), gas welded square tube, furnace welded square tube
2. According to the welding seam - straight seam welded square tube, spiral welded square tube.
Material classification

The square tube is divided into: ordinary carbon steel square tube, low alloy square tube.
1. Common carbon steel is divided into: Q195, Q215, Q235, SS400, 20# steel, 45# steel, etc.
2. Low alloy steel is divided into: Q345, 16Mn, Q390, ST52-3, etc.

Production Standard Classification
According to the production standard, the square pipe is divided into: national standard square pipe, jis square pipe, BS square pipe, ASTM, AISI square pipe, EN square pipe, DIN square pipe.

carbon steel square pipe

Sizes Of Rectangular Pipe/Square Tube

Product Name

Square/Rectangular Pipe


S235JR, S355JR, S275JR, C350LO, C250LO, G250, G350C450LO

Material Chemical Composition

Tensile strength: 315-430(Mpa) Yield steength:195(Mpa)Elongation 33  C 0.06-0.12  Mn 0.25-0.50  Si≤0.30  S≤0.050   P≤0.045


Square / Rectangular

Outer Dia(mm)

15*15mm-1200*1200mm / 10*20mm-700*300mm

Wall Thickness(mm)




Surface Treatment

1 Black,Pre-galvanized2、Oiled,powder coating3、Galvanized as your requirementPS: Pre galvanized steel pipe: 60-150g/m2;Hot dipped galvanized steel pipe: 200-400g/m2

End Finish

Plain/ beveled ends or threaded with sockets/coupling and plastic caps.


Packing in bundle with steel strips; with seaworthypackage at the end; could be done with your requirement.


With Chemical Composition and Mechanical Properties Testing; HydrostaticTest, Dimensional and Visual Inspection,  With Nondestructive Inspection


Construction pipe, machine structure pipe, agriculture equipment pipe, water and gas pipe,Greenhouse pipe, Building material, Furniture tube, Low pressure fluid tube, etc

HS Code



1: Special design available according to requirement2: Pipe can be necked dowm, punching hole on pipe wall.

3: Pipe fittings, elbows are available.

4: All production process are under the ISO9001:2000 strictly


carbon steel square pipe in our factory

Square pipes for decoration, square pipes for machine tools, square pipes for machinery industry, square pipes for chemical industry, square pipes for steel structures, square pipes for shipbuilding, square pipes for automobiles, square pipes for steel beams and columns, square pipes for special purposes.

carbon steel rectangular pipe type

According to the production process, carbon steel pipes are divided into:  hot rolled carbon steel square pipe and  cold rolled carbon steel square tube 

carbon steel square tube type

Standard of carbon steel rectangular pipe

ASTM A53 Gr.B Black and hot-dipped zinc-coated steel pipes welded and seamless
ASTM A106 Gr.B Seamless carbon steel for high temperature service
ASTM SA179 Seamless cold-drawn low-carbon steel heat exchanger and condenser tubes
ASTM SA192 Seamless carbon steel boiler tubes for high pressure
ASTM SA210 Seamless Medium-carbon boiler and superheater tubes
ASTM A213 Seamless alloy-steel boiler, superheater, and heat-exchanger tubes
ASTM A333 GR.6 seamless and welded carbon and alloy steel pipe intended for use at low temperatures.
ASTM A335 P9,P11,T22,T91 Seamless ferritic alloy-steel pipe for high-temperature service
ASTM A336 Alloy steel forgings for pressure and high-temperature parts
ASTM SA519 4140/4130 Seamless carbon for mechanical tubing
API Spec 5CT J55/K55/N80/L80/P110/K55 Seamless steel pipe for casing
API Spec 5L PSL1/PSL2 Gr.b, X42/46/52/56/65/70 Seamless steel pipe for line pipe
DIN 17175 Seamless steel tube for elevated temperture
DN2391 Cold drawn seamless prevision pipe
DIN 1629 Seamless circular unalloyed steel tubes subject to special requirements

carbon steel square pipe&tube factory stock

carbon square pipe
rectangular tube

Carbon steel pipes are shipped in Sufficient Quantities, 100% Quality Assurance, Fast Delivery

carbon steel square pipe suppliers

Professional Carbon Steel Rectangular Tube Manufacturer

Our factory has more than 30 years of production and export experience, exporting to more than 50 countries and regions, such as the United States, Canada, Brazil, Chile, the Netherlands, Tunisia, Kenya, Turkey, the United Arab Emirates, Vietnam and other countries. With a fixed production capacity value every month, it can meet the large-scale production orders of customersNow there are hundreds of customers with fixed large-scale annual orders. If you want to buy rectangular pipe, carton steel rectangular pipe,square tube, alloy steel pipe, seamless steel pipe, carbon steel seamless tube,steel coils, steel sheets ,precision steel tube,and other steel products, contact us to provide you with The most professional service, save your time and cost !

    Our factory also sincerely invites regional agents in various countries. There are more than 60 exclusive steel plate, steel coil and steel pipe agents. If you are a foreign trading company and are looking for the top suppliers of steel plates, steel pipes and steel coils in China, please contact us. To provide you with the most professional and high-quality products in China to make your business better and better !

   Our factory has the most complete steel product production line and the strictest product testing process to ensure a 100% product pass rate; the most complete logistics delivery system, with its own freight forwarder, saves you more transportation costs and guarantees 100% of the goods. perfect packaging and arrival. If you are looking for the best quality steel sheet, steel coil, steel pipe manufacturer in China, and want to save more logistics freight, please contact us, our professional multilingual sales team and logistics transportation team will provide you with the best Steel product service to ensure you receive a 100% quality guaranteed product !

   Get the best quotation for steel tubes: you can send us your specific requirements and our multilingual sales team will provide you with the best quotation!  Let our cooperation start from this order and make your business more prosperous !

  • Previous:
  • Next:

  • Write your message here and send it to us

    Related Products

  • astm a53 mild seamless carbon steel pipe

    astm a53 mild seamless carbon steel pipe

  • Structural Pipe Seamless Structural Carbon Steel Pipe

    Structural Pipe Seamless Structural Carbon Stee...

  • Large diameter heavy wall seamless steel tube

    Large diameter heavy wall seamless steel tube

  • API 5L line pipe for oil and gas line pipe

    API 5L line pipe for oil and gas line pipe

  • Hot Rolled Carbon Seamless Fluid Pipe ST37 ST52 1020 1045 A106B

    Hot Rolled Carbon Seamless Fluid Pipe ST37 ST52...

  • Carbon precision steel tube

    Carbon precision steel tube