Chinese manufacturers produce S235JR Carbon Steel Black Square Tubes for: pipeline transportation, hydraulic/automotive pipes, machinery industry, chemical industry, architectural decoration, special purposes. Various sizes of black square tubes can be customized according to customer needs.
We have 20 years of experience in the steel business, good quality, short delivery time, and high-quality S235JR Carbon Steel Black Square Tubes are also one of the most popular products of our factory.
The main difference between China S235JR Carbon Steel Black Square Tube and white iron tube is that black iron tube is not galvanized, while white iron tube is galvanized, so black iron tube is easy to rust, while white iron tube is not easy to rust. There is not much difference in hardness between the two, but there is a difference in price. Since the galvanized square tube is galvanized on the square tube, the application range of the galvanized square tube is greatly expanded relative to the square tube. S235JR Carbon Steel Black Square Tube is mainly used in curtain walls, construction, machinery manufacturing, steel structure engineering, shipbuilding, solar brackets, steel structure engineering, power engineering, power plants, agricultural machinery, glass curtain walls, automobile chassis, airports, etc.
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Product Name |
Q19 Q195 Q235 Q345 20# Square Tube 5.8m-12m Length black square pipe |
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Material |
Q195 similar to a283 GR.B, 040a10, ss330 Q235 similar to a283 GR.D, 080a15,CS type B |
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Grade |
ASTM A500 Grade B/C,EN 10219 S235JRH/S355J2H,JIS G 3466
STKR400/STKR490,BS 1387,DIN 2395-2 |
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Outer diameter |
15*15mm-1000*1000mm / 10*20mm-700*300mm or customized as required |
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Wall Thickness |
0.5-30mm or customized as required |
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Length |
5.8m-12m or customized as required |
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Surface Treatment |
1)Black,Pre-galvanized 2)oiled,powder coating 3)Galvanized as your requirement |
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End Finish |
Plain/ beveled ends or threaded with sockets/coupling and plastic caps.,etc. |
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Technology |
Hot rolled, Welded(ERW) |
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Zinc Coating |
30-600g/m2 |
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Shape |
Square/Rectangular |
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Inspection |
With Chemical Composition and Mechanical Properties Testing; Hydrostatic Test, Dimensional and Visual Inspection, With Nondestructive Inspection |
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Packaging |
Packing in bundle with steel strips; with seaworthy package at the end; could be done with your requirement. |
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Processing service |
Bending, Welding, Decoiling, Punching, Cutting |
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Transport package |
Standard sea export packing or as required |
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Payment terms |
T/T,L/C |
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Loading port |
Tianjin/Qingdao/Shanghai Port |
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Application |
construction pipe, machine structure pipe, agriculture equipment pipe, water and gas pipe, Greenhouse pipe, Building material, Furniture tube, Low pressure fluid tube, etc |
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Export market |
Europe, Africa, Central Asia, Southeast Asia, Middle East, South America, North America, etc |
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Others |
1:Special design available according to requirement |
1. Material characteristics of black square tube Black square tube, generally refers to black square steel tube, is a common building material. Its materials generally include the following: 1. Carbon structural steel: The main components are carbon and steel. It has the advantages of high strength, high wear resistance, and easy processing. It is widely used in construction, machinery, automobiles and other fields.
2. Low alloy structural steel: The main components are steel, chromium, manganese, molybdenum and other alloy elements. It has high strength and wear resistance and is widely used in machinery manufacturing, construction and other fields.
3. Wire and cable materials: The main components are conductive materials such as copper and aluminum, which are commonly used in power transmission, communications and other industries.
