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Carbon Steel Square Tube
Square and rectangular pipe is a name for square pipe and rectangular pipe, that is, steel pipes with equal and unequal side lengths.

Contact:Samantha Z

Phone:+8613583116312

Whatsapp/Wechat:+8613583116312

Email: google@s-materialgroup.com

Address: Yingsheng Steel Market, Fengnan District, Tangshan City, Hebei Province

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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.Also known as square and rectangular cold-formed hollow steel, referred to as square tube and rectangular tube, codenamed F and J respectively.1. The allowable deviation of the wall thickness of the square and rectangular pipe shall not exceed plus or minus 10% of the nominal wall thickness when the wall thickness is not more than 10mm, and shall be plus or minus 8% of the wall thickness when the wall thickness is greater than 10mm. Except for wall thickness.2. The usual delivery length of the square tube is 4000mm-12000mm, mostly 6000mm and 12000mm. The square rectangular tube is allowed to deliver short-length and non-fixed-length products not less than 2000mm, and it can also be delivered in the form of an interface tube, but the buyer should cut off the interface tube when using it. The weight of short-length and non-fixed-length products shall not exceed 5% of the total delivery quantity, and for square and rectangular pipes with a theoretical weight greater than 20kg/m, shall not exceed 10% of the total delivery quantity3. The curvature of the square tube shall not be greater than 2mm per meter, and the total curvature shall not be greater than 0.2% of the total length







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COMMODITY NAMESQUARE AND RECTANGULAR HOLLOW SECTION PIPE/ TUBE
MATERIAL GRADEQ195 = S195 / A53 Grade AQ235 = S235 / A53 Grade B / A500 Grade A / STK400 / SS400 / ST42.2Q355 = S355JR / A500 Grade B Grade C
STANDARDASTM A500 Gr.A / B/ C
PIPE SURFACEGalvanized, black painted, or anti-rust oiled
PIPE ENDSPLAIN ENDS 
CERTIFICATESISO 9001 / BSI/ UL / FM
TRADE TERMSFOB/ CFR/ CIF/ EXW/ FCA
PAYMENT TERMS30%&70% T/T ;  100% LC AT SIGHT (others can be negotiated)
DELIVERY TIME30-45 DAYS AFTER RECEIVE DEPOSIT OR LC
HOT SALES MARKETSoutheast Asia, South Asia, Middle East, Europe, Middle&South America, Africa and Oceania
product category:According to the production process, square and rectangular pipes are divided into: hot-rolled seamless square pipes, cold-drawn seamless square pipes, extruded seamless square pipes, and welded square pipes.Among them, the welded square tube is divided into1. According to the process - arc welded square tube, resistance welded square tube (high frequency, low frequency), gas welded square tube, furnace welded square tube2. According to the welding seam - straight seam welded square tube, spiral welded square tube. Acorrding to the 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.According to the production standard, the square tube is divided into: national standard square tube, Japanese standard square tube, British standard square tube, American standard square tube, European standard square tube, and non-standard square tube.
Implementation Standard:GB/T6728-2002, GB/T6725-2002, GBT3094-2000, JG 178-2005. ASTM A500 JIS G3466, EN10210 or technical agreement.GB/T3094-2000 (national standard) cold-pressed special-shaped rectangular tube.GB/T6728-2002 (National Standard) Cold-formed hollow section steel for structure.ASTM A500 (American Standard) Structural Carbon Steel Cold Formed Round and Shaped Section Welded Rectangular Tubes and Seamless Rectangular Tubes.EN10219-1-2006 (European Standard) Unalloyed and fine-grained cold-formed welded hollow structural profiles.JIS G 3466 (Japanese standard) Angular rectangular tube for general construction.



REGULAR  SIZE
SIZE (OUTER DIAMETER)WALL THICKNESSLENGTH
20x20 / 25x251.2MM --2.75MM6M IN STOCK (OR CUSTOMIZED)
30x30 / 20x40 / 30x40 / 25x401.2MM -- 3.5MM6M IN STOCK (OR CUSTOMIZED)
40x40 / 50x5030x50 / 25x50 / 30x60 / 40x601.2MM -- 4.75 MM6M IN STOCK (OR CUSTOMIZED)
60x60 / 50x70 / 40x80 / 40x501.2 MM -- 5.75 MM6M IN STOCK (OR CUSTOMIZED)
70x70 / 60x80 / 50x80 / 100x40 / 50x901.5MM -- 5.75 MM6M IN STOCK (OR CUSTOMIZED)
75x75 / 80x80 / 90x9060x100 / 50x100 / 120x60 / 100x80 / 60x901.5MM -- 7.75 MM6M IN STOCK (OR CUSTOMIZED)


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Application areas: 

Widely used in machinery manufacturing, construction, metallurgical industry, agricultural vehicles, agricultural 

greenhouses, automobile industry, railways, highway guardrails, container skeletons, furniture, decoration and 

steel structures.

Used in engineering construction, glass curtain wall, door and window decoration, steel structure, guardrail, 

machinery manufacturing, automobile manufacturing, home appliance manufacturing, shipbuilding, container 

manufacturing, electric power, agricultural construction, agricultural greenhouse, bicycle rack, motorcycle rack, 

shelf, fitness equipment, Leisure and tourism products, steel furniture, various specifications of oil casing, oil 

pipe and line pipe, water, gas, sewage, air, heating and other fluid transportation, fire protection and support, 

construction, etc.


FAQ:

1..Q: Can I get samples before placing an order?

A: Yes, of course. Usually our samples are free. We can produce according to your samples or technical 

drawings.


2. Q: When is your delivery time?

A: Our delivery time is about one week, and the time depends on the number of customers.


3.Q: What are your payment terms?

A: Our usual payment methods are T/T, L/C, D/A, D/P, Western Union, MoneyGram, payment methods can 

be negotiated and customized collaborate with clients.


4. Q: What has your factory done in quality control?

A: We have obtained ISO, CE and other certifications. From material to product, we check every process to 

maintain good quality.


5. Q: How do you make sure that what I get is good?

A: We accept all third-party inspections and support you to inspect your goods at any time. If the goods are 

unqualified, you can reject this batch of goods.


6. Q: How do you keep our business in good long-term relationship?

A: We maintain good quality and competitive price to ensure the interests of our customers; we respect every 

customer as our friend, we do business with them sincerely and make friends. no matter where they come from.


7.Q: What is the minimum order quantity?

A: The minimum order quantity is 1 ton, which can be customized according to customer requirements.


8. Q: How can we trust your company?

A: We have been focusing on the steel business for many years, headquartered in Jinan City, Shandong Province, 

you are welcome to visit our company and factory at any time. We also sincerely invite all customers to conduct 

video conferences.

 

If you have any questions about us and our products, please leave a message.


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