Stainless steel square tube is a hollow strip of steel, called a square tube because its cross-section is square. A large number of pipelines are used for transporting fluids, such as petroleum, natural gas, water, gas, steam, etc. In addition, when the bending and torsional strength are the same, they are lighter in weight, so they are also widely used in the manufacturing of mechanical parts and engineering structures.

Classification of stainless steel square pipes: Square pipes are divided into two categories: seamless steel pipes and welded steel pipes (welded pipes). According to the cross-sectional shape, it can be divided into square and rectangular pipes. Circular steel pipes are widely used, but there are also some irregular steel pipes such as semi-circular, hexagonal, equilateral triangle, octagonal, etc.

Square tube specification: 5 * 5~150 * 150 mm thickness: 0.4~6.0 mm

Square tube material: 304, 304L, TP304, TP316L, 316, 316L, 316Ti, 321, 347H, 310S,etc.

Production process: Round steel preparation → Heating → Hot rolling perforation → Cutting head → Acid washing → Grinding → Lubrication → Cold rolling processing → Degreasing → Solution heat treatment → Straightening → Pipe cutting → Acid washing → Finished product inspection.

For stainless steel square pipes that are subjected to fluid pressure, hydraulic tests must be conducted to verify their pressure resistance and quality. It is considered qualified if there is no leakage, wetting, or expansion under the specified pressure. Some steel pipes also need to undergo edge rolling tests, expansion tests, flattening tests, etc. according to standards or the requirements of the purchaser.

Decorative stainless steel square pipes are widely used in anti-theft nets, gates, and guardrails. The wall thickness requirement for square pipes in building decoration is generally between 0.4~6.0mm, and the pipe diameter requirement is between 5.0~150.0mm. The specific values need to be determined based on the application and pipe diameter size.

Conventional diameter decorative stainless steel square tube: with a wall thickness between 0.4~2.0mm, suitable for anti-theft nets and courtyard fences used in households. The wall thickness is moderate and the load-bearing capacity is moderate. This type of specification is easy to find and purchase.

Medium to large diameter decorative stainless steel square tube: with a wall thickness ranging from 1.5 to 6.0mm, the pipe diameter is relatively large compared to the pipe wall, and the load-bearing and pressure bearing capacity also increase accordingly. It is suitable for buildings in public places, such as lamp posts, pedestrian bridge guardrails, municipal guardrails, etc

Stainless steel pipes have strong ductility, can be polished on the surface, and can be easily welded, so stainless steel pipes can be used for many styling designs.

We can produce and process various shapes and designs for use in furniture, exhibition booths, metal products, metal special equipment, and personalized crafts.

In addition, geological exploration, chemical industry, construction industry production, mechanical engineering, aircraft and automobile manufacturing, including heating furnaces, medical equipment products, home furnishings, and bicycle manufacturing, also require a large amount of various types of stainless steel square tubes.

Under normal circumstances, the appearance of stainless steel pipes has a brightness of 400 and a typical metallic texture. However, with further promotion of production and processing, the appearance can be made into a mirror like brightness. Stainless steel pipes can also be treated with matte finish on the surface. Whether it is mirror treatment or metal wire drawing matte treatment, they have made ordinary stainless steel pipes taller and more sophisticated.

The commonly used grades are:

Austenitic Stainless Steel:304,304H,304L,316L,316H,316Ti,317,317L,321,347,347H,347HFG,310S,310H,

Super Austenitic Stainless Steel: S30432,S31042,N0367,904L,Nitronic 40,Nitronic 60,XM-19

Duplex Stainless Steel: 254SMO,F50,2205,F53,F55,F60,F61,F65,S31500,S31803,S32205,S32750,S32760

PH Steel: 15-5PH,17-4PH,17-7PH,13-8MO