High - strength welded square tube for build

A welded square tube is a hollow structural section (HSS) characterized by its square shape and uniform wall thickness. It is produced by taking flat steel sheets, forming them into a square shape, and then welding the edges together to create a strong, seamless tube. This manufacturing process not only enhances the structural integrity of the tube but also allows for a variety of sizes and thicknesses to meet specific project requirements.

product details

specification

Product Name	welded square tube
Standard	ASTM,JIS,DIN,GB,AISI,DIN,EN
Material	Q235、Q345、304、316、201、20#、42CrMo、6061、6063
Outer diameter range	Small diameter square tube: The outer diameter is generally between 20mm and 100mm, and is often used for light structures and small equipment. Medium diameter square tube: The outer diameter is generally between 100mm and 300mm, suitable for general construction and mechanical structures. Large diameter square tube: The outer diameter is generally between 300mm and 600mm, suitable for heavy structures and large equipment.
Thickness range	Thin-wall square tube: The wall thickness is generally between 1.0mm and 3.0mm, suitable for light structures and decorative purposes. Medium wall thickness square tube: The wall thickness is generally between 3.0mm and 6.0mm, suitable for general construction and mechanical structures. Thick-walled square tube: The wall thickness is generally between 6.0mm and 20mm, suitable for heavy structures and applications with high load-bearing requirements.
Length range	Customized length according to customer's special requirements.
Error	±1%
Certification	ISO 9001 ，CE，API
Surface treatment	Hot-dip galvanizing、Cold galvanizing、Plastic spraying、Phosphating、Polishing、Oxidation treatment
Country of origin	China
Main Applications	1.Building Structure: Welded square tubes are often used in building frames, supporting structures, fences and stairs, etc. due to their high strength and strong load-bearing capacity.
	2.Mechanical manufacturing: In mechanical equipment, welded square tubes can be used as racks, brackets and connectors, and are suitable for structural parts of various mechanical equipment.
	3.Transportation: Welded square tubes are widely used in structural parts and accessories of transportation vehicles such as automobiles, ships, and railways.
	4.Furniture manufacturing: Welded square tubes are often used to make modern furniture, such as tables, chairs, shelves, etc., because of their beautiful appearance and easy processing.
	5.Electricity and Communications: In the electricity and communications industries, welded square tubes are used to make electric towers, communication towers and support frames, etc.
	6.Agricultural facilities: Welded square tubes can be used for structural support of agricultural facilities such as greenhouses and farms.
	7.Sports facilities: Welded square tubes are also widely used in sports venues and fitness equipment, such as the frames and supporting structures of sports equipment.
Package	Simple packaging, reinforced packaging, wooden frame, metal frame, pallet, wrapping
Payment Term	TT, LC,Cash, Paypal, DP, DA,Western Union or Others.
After-sales service	1. Quality assurance period 2. Return and exchange policy 3. Delivery and acceptance assistance 4. Customer feedback collection

Product Display

Production process

.Raw material preparation:
Choose appropriate steel coils or steel plates as raw materials, usually hot-rolled or cold-rolled carbon steel, stainless steel, etc.
.Cutting:
Cutting steel coils or plates into appropriate widths for subsequent forming.
.Molding:
Use a forming machine to roll the cut steel strip or steel plate into the preliminary shape of the square tube.
.Welding:
Weld the edges of the formed square tube, usually using high frequency welding or submerged arc welding to ensure the strength and quality of the weld.
.Cooling:
After welding, the square tube needs to be cooled to ensure the stability and strength of the weld.
.Correction:
Correct the square tube after welding to eliminate the deformation caused by welding and ensure the straightness and dimensional accuracy of the square tube.
.Cutting:
Cut square tubes to required lengths, usually custom made to customer specifications.
.Surface treatment:
Carry out surface treatment as needed, such as hot-dip galvanizing, plastic spraying, polishing, etc. to improve the corrosion resistance and aesthetics of the square tube.
.Inspection:
Carry out quality inspection on finished products, including appearance, size, weld quality, etc., to ensure compliance with relevant standards and customer requirements.
.Packing and Delivery:
Pack qualified welded square tubes and prepare to ship to customers.