Cheap Price St42 St37-2 St35.4 St52 Low Carbon ASTM A500 Q235 S235jr S355jr Cold Rolled / Hot Rolle Seamless Black Annealed Steel Square Tube

• Customization: Available
• After-sales Service: Hot Rolled Seamless Steel Pipe Endless Service
• Warranty: 5
• Model NO.: ZD-HRRSSP
• Type: Seamless
• Technique: Hot Rolled
• Material: Carbon Steel
• Surface Treatment: Black
• Usage: Pipeline Transport, Boiler Pipe, Hydraulic/Automobile Pipe, Oil/Gas Drilling, Food/Beverage/Dairy Products, Machinery Industry, Chemical Industry, Mining, Construction & Decoration, Special Purpose
• Section Shape: Square
• Custom Made: Yes
• Custom Cycle: 7-15 Days
• Production Standards: ASTM/JIS/AISI/DIN/BS/En/GB
• Payment Term: 30%T/T Advance + 70% Balance
• Alloy or Not: Low Alloy
• MOQ: 3tons
• Lengh: Customized
• Advantage: Wear Resistance, Machinability, Easy Welding
• Specification2: Zd-Hrssp20e10/20/30/40/50/60/70
• Specification3: Zd-Hrssp20e80/90/102/118/120
• Standard1: ASTM a 6/a 6m-07 BS 4-1:1993 En 10024 JIS G 3192
• Transport Package: Export Standard Package/as Request
• Specification: According to customer requirements
• Trademark: ZHENGDE
• Origin: China
• HS Code: 7304192000
• Production Capacity: 65000 Tons/Month

Product Description

Product Description

Square tubes are classified according to their cross-sectional shapes: simple cross-section square tubes: square tubes and rectangular tubes. After the process is processed, it is rolled into strip steel. Generally, the strip steel is unpacked, flattened, crimped, and welded into a round tube, then the round tube is rolled into a square tube, and then cut to the required length. According to the production process, the square tube is divided into: hot-rolled seamless square tube, cold-drawn seamless square tube, extruded seamless square tube, and welded square tube. Rectangular pipes are divided into ultra-thick-walled rectangular pipes, thick-walled rectangular pipes and thin-walled rectangular pipes according to their wall thickness.

Square tubes are mainly used in construction, light industry, automobile, agriculture, animal husbandry, fishery and other industries. Such as building roofs, highway guardrails, sheet metal processing, roof grilles, household appliance shells, ventilation ducts, chimneys, kitchen utensils, grain storage and transportation, frozen meat and aquatic products, etc.

Basic size			Area	Weight
A	B	S	F/cm2	G/kg·m-
mm
36	18	1.5	1.49	1.17
		2	1.93	1.52
		2.5	2.34	1.84
		3	2.73	2.14
		3.5	3.08	2.42
50	32	2	3.05	2.4
		2.5	3.74	2.94
		3	4.41	3.46
70	50	4	8.69	6.82
		5	10.57	8.3
		6	12.34	9.69
		7	14	10.99
80	60	4	10.29	8.07
		5	12.57	9.87
		6	14.74	11.57
		7	16.8	13.19
90	60	4	11.09	8.7
		5	13.57	10.65
		6	15.94	12.52
		7	18.2	14.29
100	70	5	15.57	12.22
		6	18.34	14.4
		7	21	16.48
		8	23.54	18.48

Our Advantages

Three-roll pipe mill
The rectangular seamless steel pipe produced by the three-roll mill for hot-rolling seamless steel pipe has high precision. Because of the cross-rolling with the mandrel, the rolling action is repeated many times in one pass, which greatly improves the accuracy of the wall thickness and is not easy to produce. Defects such as scratches, ears, and green lines; the flexibility in production is large, and the pass size can be changed with the help of the clutch of the roll.

Adequate inventory
Standing inventory of carbon Rectangular seamless tubes, seamless special-shaped tubes, alloy seamless tubes, precision tubes. Various types of seamless steel pipes with a specification of 5-426*0.5-60mm and a length of 2-16m. The cold-rolled precision bright tubes produced by our factory have smooth appearance, uniform wall thickness, no oxide layer, and high precision. The inner hole of the steel pipe can be divided into round type, spline type, plum blossom type, etc. It is widely used in automobiles, motorcycles, electric power, petrochemicals, ships, aerospace, bearings, pneumatic components, oil cylinders, boiler equipment, medical equipment, fitness equipment and other industries.

Attention to detail
No matter how to choose the Rectangular seamless steel pipe, its quality cannot be ignored. It must be noted that there should be no defects on the surface, such as small cracks or scars, etc., and that the thickness of the pipe wall is the same to ensure uniformity. The physical comparison is still very important. Only after the basic comparison of the physical objects is done, can the steel pipes that meet the needs be selected. The processing technology of each seamless steel pipe is different, which will also affect its application field. Now it is generally processed by cold drawing and hot rolling, and the processing effect of the two and the application of steel pipes will also have certain differences.

Applicable scene
Rectangular seamless steel pipes are mainly used in engineering construction, glass curtain walls, door and window decoration, steel structures, guardrails, machinery manufacturing, automobile manufacturing, home appliance manufacturing, shipbuilding, container manufacturing, electric power, agricultural construction, agricultural greenhouses, bicycle racks, motorcycle racks, Shelves, fitness equipment, leisure and tourism products, steel furniture, various specifications of oil casing, oil pipes and line pipes, water, gas, sewage, air, heating and other fluid transportation, fire protection and support, construction industry and other fields.

Quality first: production and inspection in strict accordance with production standards;
Price advantage: discounts based on real market prices;
Transaction security: There will be no loss of customer funds;
After-sales guarantee: the customer's problem is our problem;
Long-term cooperation: quality assurance, price advantage, sincere service can last for a long time.

Detailed Photos

Packaging & Shipping

Company Profile

Shandong Zhengde Metal Manufacturing Co., Ltd. is a production and sales company integrating hot-rolled steel coils, cold-rolled steel coils, galvanized steel coils, color-coated steel coils, section steel, steel pipes, steel wires, metal mesh, stainless steel, aluminum, copper and other metal products integrated large enterprises. Five production and sales bases have been formed in Binzhou, Liaocheng, Wuxi, Tianjin, Jinan and Tai'an, with more than 100 production lines, 4 nationally recognized laboratories, 2 technical engineering centers, and 5 enterprise technology centers. Products are exported to more than 50 countries and regions such as North America, South America, Europe, Africa, Oceania, Middle East, and Southeast Asia.

Certifications