The quality and performance of square tubes have a lot to do with the content of specific elements in the raw steel. Let's introduce ten elements that have a greater impact:

(1) Aluminum: It can refine the grain structure of steel and inhibit the aging of low-carbon steel. Improving the toughness of steel at low temperatures can also improve the oxidation resistance of steel, improve the wear resistance and fatigue strength of square tubes, etc.;

(2) Phosphorus: It can make your plasticity and sturdiness connected with aluminum obviously, especially in small conditions a lot more serious. This kind of occurrence is termed your frosty brittleness.

(3) Silicon: It can increase the hardness of steel, but the plasticity and toughness will decrease. The steel for electrical purposes contains a certain amount of silicon, which can improve the soft magnetic properties;

(4) Nickel: It can improve the strength and toughness of square tubes and improve hardenability. When the content is high, it can significantly change some physical properties of steel and alloys, and improve the corrosion resistance of pipes;

(5) Copper: Its outstanding function is to improve the atmospheric corrosion resistance of ordinary low-alloy steel, especially when it is used in conjunction with phosphorus;

(6) Carbon: The higher the carbon content, the higher the hardness of the steel, but the worse its plasticity and toughness;

(7) Boron: When the square tube contains a small amount of boron, the hardenability of the steel can be doubled;

(8) Vanadium: It can refine the grain structure of steel, and improve the strength, toughness, and wear resistance of steel. When it melts into austenite at high temperature, it can increase the hardenability of steel; on the contrary, when it exists in the form of carbide, it will reduce its hardenability;

(9) Sulfur: It belongs to harmful impurities in steel. Steel with high sulfur content is easy to be brittle when it is press-processed at high temperature, which is usually called hot brittleness;

(10) Manganese: It can improve the strength of square tubes, weaken and eliminate the adverse effects of sulfur, and improve the hardenability of steel. High-alloy steel (high manganese steel) with high manganese content has good resistance to abrasiveness and other physical properties.