The properties and structure of 304 stainless steel square tubes

Square tubes are a type of square-shaped pipe material, which are steel pipes with equal side lengths. They are formed by processing the steel strip through various processes. Generally, the steel strip is unpacked, flattened, rolled, welded to form a round tube, then the round tube is rolled into a square tube and cut to the desired length. Usually, there are 50 tubes in each package. So, how many people are familiar with 304 stainless steel square tubes? Now, let's talk about the properties and structure of 304 stainless steel square tubes. 

Main properties of 304 stainless steel square tubes 

Square tubes can be classified as seamless or welded. Seamless square tubes are formed by extruding seamless round tubes. 

1. Analysis of performance index for square tubes - Plasticity

Plasticity refers to the ability of a metallic material to undergo plastic deformation (permanent deformation) under load without breaking. 

2. Performance Index Analysis of Square Tubes - Hardness

Hardness is a measure of the softness or hardness of a metal material. Currently, the most commonly used method for measuring hardness in production is the indentation hardness method. This method involves using a certain geometrically shaped indenter to press into the surface of the tested metal material under a certain load, and the hardness value is determined based on the indentation degree. 

The commonly used methods include Brinell hardness (HB), Rockwell hardness (HRA, HRB, HRC) and Vickers hardness (HV), etc.

304 stainless steel square tube structure and dimensions 

Imported first-class raw materials: SUS304, 304L, 316, 316L 201, 202

1. Round tubes: 9.5 - 406.4mm in diameter, thickness: 0.4 - 12.0mm

2. Square tubes: 10*10 - 150*150mm in size, thickness: 0.4 - 6.0mm

3. Rectangular tubes: 10*20 - 100*200mm in size, thickness: 0.4 - 6.0mm

4. Flower tubes: 15.9 - 76.2mm in diameter, thickness: 1.0 - 1.5mm 

The product is used for: piping of equipment in industries such as chemical, petrochemical, water treatment, papermaking, and food hygiene. 

Application scope of 304 stainless steel square tubes 

304 stainless steel pipes, as a type of stainless and heat-resistant steel, are used in food processing equipment, general chemical equipment, and atomic energy industrial equipment.

The rust resistance of 304 stainless steel is stronger than that of the 200 series stainless steel materials. It also performs well in terms of high temperature resistance, capable of reaching up to 1000-1200 degrees. 304 stainless steel has excellent stainless and corrosion-resistant properties and good intergranular corrosion resistance. 

304 stainless steel material has strong corrosion resistance when it is placed in nitric acid with a concentration of ≤ 65% and below its boiling point. It also has good corrosion resistance to alkaline solutions and most organic acids and inorganic acids. It is a high-alloy steel that can resist corrosion in air or chemical corrosive media. It is a kind of stainless steel with a beautiful surface and good corrosion resistance, which does not require surface treatment such as painting, but can exert the inherent surface performance of stainless steel and is used in various aspects of steel. It is usually called stainless steel. Representative materials include 13 chromium steel, 18-8 chromium-nickel steel and other high-alloy steels. 

Classification of 304 Stainless Steel Square Tubes 

There are many classifications for 304 stainless steel pipes. Firstly, there are seamless pipes and straight seam welded pipes. Secondly, the most basic classification is structural 304 stainless steel pipes and industrial fluid transportation 304 stainless steel pipes. There is also a classification based on standards such as Chinese standard, Japanese standard, and American standard.