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- Chemical composition
- Product Description
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Basic Info.
Product Description
Seamless square rectangular steel pipe is a type of square, rectangular steel with a hollow cross-section and no seams around it. Seamless steel pipes are made from steel ingots or solid billets that are perforated into tubes, and then hot rolled, cold rolled, or cold drawn. Seamless steel pipes have a hollow cross-section and are widely used for conveying fluids in pipelines. Compared with solid steel materials such as round steel, steel pipes have a lighter weight when their bending and torsional strength are the same. They are an economic cross-section steel and are widely used in the manufacturing of structural components and mechanical components such as petroleum drill pipes, automotive transmission shafts, bicycle frames, and steel scaffolding used in construction.
| C | Si | Mn | P | S | Cr | Ni | Cu | As | N | |
| Q195 Cr.B SS330 SPHC SPHD S185 | ≤0.12 | ≤0.3 | ≤0.5 | ≤0.35 | ≤0.04 | ≤0.3 | ≤0.3 | ≤0.3 | ≤0.08 | ≤0.008 |
| Q215 RSt34-2 1.0034 St2ps | ≤0.15 | ≤0.35 | ≤0.12 | ≤0.045 | ≤0.05 | ≤0.3 | ≤0.3 | ≤0.3 | ≤0.08 | ≤0.008 |
| SS400 1015 1.0038 Q235 RSt37-2 | 0.18-0.28 | ≤0.3 | 0.4-0.7 | ≤0.045 | ≤0.05 | ≤0.3 | ≤0.3 | ≤0.35 | - | ≤0.008 |
| SM400A Q255 A709M Gr.36 St44-2 1.0044 | 0.18-0.28 | ≤0.3 | 0.4-0.7 | ≤0.045 | ≤0.05 | ≤0.3 | ≤0.3 | ≤0.35 | - | ≤0.008 |
| Q275 U12752 SS490 K02901 S275J2G3 1.0144 | ≤0.24 | ≤0.35 | ≤1.5 | ≤0.045 | ≤0.05 | ≤0.3 | ≤0.3 | ≤0.3 | ≤0.08 | ≤0.008 |
| Product name | High Quality Black square pipe rectangular tube Galvanized Square Steel Pipes |
| Size | Rectangular Tube: 10*20-120*80mm Square Tube : 16*16-250*250 mm (check sizes provided from below table) |
| Length | 6m or based on your request |
| Standard | EN10210, EN10219, DIN17100, ASTM A36,JIS G3466 |
| Materials | Q195, Q235, Q235B, Q275, Q345B, S235, S235jr, S355, S355jr, SS400, SS330, STK490,St33, St37, St52/ ASTM A36, A53, A106 |
| Surface | Oil, bared, black paint, galvanized |
| End finish | Plain end |
| Technique | hot rolled, welded(erw) |
| MOQ | 25tons |
| Usage | Civil engineering, architecture, steel towers, shipyard, scaffoldings, struts, piles for suppression of landslide and other structures |
| Shipment | by bulk or load into 20ft / 40ft containers |
| Delivery time | Prompt delivery, or as order's quantity. |
| Payment Terms | T/T or L/C at sight |
| Price term | Ex-work,FOB,CIF,CFR,etc. |
| Packing | Export standard package, suit for all kinds of transport, or as required. |
Seamless Steel Pipe/Tube
--Precise custom outer diameter and inner diameter
--Tight tolerances, resulting in reduced machine time / Dimensional accuracy
--Smooth and Clean OD and ID surfaces
--Excellent machining characteristics
--Wider range of physical properties attainable through process and annealing option
1. Purpose of Cold Drawn Seamless Rectangular Pipe Cold drawn seamless rectangular pipe is widely used in construction, machinery, chemical, light industry, automotive, aerospace, metallurgy, and other industries, and can be made into pipes of various sizes, shapes, and performance.
2. Seamless cold drawn square pipe is a kind of hollow square section lightweight thin-walled steel pipe, also known as steel cold formed profiles. Seamless cold drawn square tubes are widely used. It is widely used in the manufacture of structural and mechanical parts, such as petroleum drill pipes, automobile transmission shafts, bicycle frames, and steel scaffolding used in construction. Steel pipes are widely used to manufacture circular parts, which can improve material utilization, simplify manufacturing processes, and save materials and processing hours. Steel pipes have been widely used for manufacturing
Delivery Condition:
| +C(BK) | Cold drawn/hard.After the last cold forming,no heat treatment. |
| +LC(BKW) | Cold drawn/soft.After the last heat treatment follows the cold drawing there is a light finishing pass. |
| +SR(BKS) | Cold drawn and stress relieved annealed. After the final cold drawing process the tubes are stress relieved annealed in a controlled atmosphere. |
| +A(GBK) | After the final cold drawing process the tubes are stress relieved annealed in a controlled atmosphere. |
| +N(NBK) | Normalized. After the last cold drawing process the tubes are annealed in a controlled atmosphere. |
| Out Diameter | Wall Thickness | Square Pipe/Tube(mm) | Rectangular Pipe/Tube(mm) | |||
| Inch | mm | mm | 16×16×0.4~1.5 | 70×70×2.0~6.0 | 10×20×0.6~1.5 | 30×60×1.0~4.5 |
| 1/2 | 21.3 | 0.6-3.0 | 18×18×0.4~1.5 | 75×75×2.0~6.0 | 14×21×0.6~1.5 | 40×50×1.0~4.5 |
| 3/4 | 26.9 | 0.6-3.0 | 20×20×0.4~1.5 | 80×80×2.0~6.0 | 15×30×1.5~1.5 | 40×60×1.0~5.0 |
| 1 | 33.4 | 1.0-3.0 | 25×25×0.6~2.0 | 85×85×2.0~6.0 | 15×38×0.6~1.5 | 40×80×1.5~5.0 |
| 1 1/4 | 42.3 | 1.0-4.0 | 30×30×0.6~4.0 | 95×95×2.0~8.0 | 20×30×0.6~2.0 | 40×100×2.0~5.0 |
| 1 1/2 | 48.3 | 1.0-4.0 | 34×34×1.0~2.0 | 100×100×2.0~8.0 | 20×40×0.8~2.0 | 50×60×2.0~5.0 |
| 2 | 60.3 | 1.5-4.0 | 35×35×1.0~4.0 | 120×120×4.0~8.0 | 20×50×1.0~2.0 | 50×80×2.0~5.0 |
| 2 1/2 | 76.1 | 1.5-4.0 | 38×38×1.0~4.0 | 150×150×6.0~10.0 | 22×35×0.9~2.0 | 50×100×2.0~8.0 |
| 3 | 88.9 | 1.5-9.5 | 40×40×1.0~4.5 | 180×180×6.0~12.0 | 25×40×0.9~3.75 | 60×80×2.0~6.0 |
| 4 | 114.3 | 2.0-9.5 | 44×44×1.0~4.5 | 200×200×6.0~12.0 | 25×65×1.0~2.0 | 80×100×2.0~8.0 |
| 5 | 141.3 | 3.0-9.5 | 45×45×1.0~5.0 | 220×220×6.0~14.0 | 30×40×1.0~3.75 | 120×60×2.5~10.0 |
| 6 | 168.3 | 3.0-12.0 | 50×50×1.0~5.0 | 250×250×6.0~14.0 | 30×45×1.0~3.75 | 120×80×2.5~10.0 |
| 8 | 219.1 | 3.2-12.0 | 60×60×1.5~5.0 | 30×50×1.0~4.0 | ||
| 10 | 273 | 3.2-12.0 | ||||
| 12 | 323.8 | 6.0-15.0 | ||||
| 14 | 355.6 | 8.0-15.0 | ||||
| 16 | 406.4 | 8.0-20.0 | ||||
Packaging and delivery of square and rectangular hollow section pipes and steel pipes: 1. OD 300mm and below is packed with hexagonal maritime binding tape and steel tape, with two nylon slings for each bundle
2. Bulk with OD above 300mm or according to customer comments
Trial order of 25 tons/container and 5 tons/size;
4. The maximum length of a 20 "container is 5.8 m;
5. The maximum length of a 40 "container is 11.8m.
1. Who are we?
Our headquarter is located in Shandong, China. Since 2022, we have sold to North America (60.00%), Western Europe (14.00%) and South America (6.00%). There are about 11-50 people in our office.
2. How do we guarantee quality?
Always provide pre-production samples before mass production;
Always carry out final inspection before shipment;
3. What can you buy from us?
Copper, aluminum, die steel, titanium, customized machine parts
4. Why should you buy from us instead of other suppliers?
The company has 25 years of production experience. It has advanced precision production equipment, modern large warehouse, 200000 tons of inventory goods and a number of long-term stable cooperative customers.
5. What services can we provide?
Accepted delivery conditions: FOB, CFR, CIF, EXW
Accepted payment currency: US dollar, Euro, Japanese yen, Canadian dollar, Australian dollar, Hong Kong dollar, British pound, RMB, Swiss franc;
Accepted payment type: T/T, L/C, D/P D/A, PayPal;
Optional ports: Tianjin, Shanghai, Guangzhou;
Spoken: English, Chinese
6. How can we get your price?
A. We need the following information to quote for you:
1). Product Name
2). standard
3). Material grade (chemical composition)
4). dimension
5). amount
6). Special part drawin