What are the factors that affect the performance of seamless steel tube?

The quality of seamless steel tube is affected by many factors, and the customization of seamless steel tube is also customized by many specifications. So what are the factors that affect the performance of seamless steel tube?

(1) Carbon: the higher the carbon content, the higher the hardness, but the worse the plasticity and toughness.
(2) Sulfur: it is a harmful impurity in steel. When the steel with high sulfur content is processed under high temperature and pressure, it is easy to crack, which is usually called hot brittleness.
(3) Phosphorus: it can obviously reduce the plasticity and toughness of steel, especially at low temperature. This phenomenon is called cold brittleness. In high-quality steel, sulfur and phosphorus should be strictly controlled. But on the other hand, the high content of sulfur and phosphorus in low-carbon steel can make it cut easily, which is beneficial to improve the machinability of steel.
(4) Manganese: it can improve the strength of steel, weaken and eliminate the adverse effect of sulfur, and improve the hardenability of steel. High alloy steel (high manganese steel) with high manganese content has good wear resistance and other physical properties.
(5) Silicon: it can improve the hardness of steel, but the plasticity and toughness decrease. The steel for electrical engineering contains a certain amount of silicon, which can improve the soft magnetic properties.
(6) Tungsten: can improve the red hardness and heat strength of steel, and can improve the wear resistance of steel.
(7) Chromium: it can improve the hardenability and wear resistance of steel, improve the corrosion resistance and oxidation resistance of steel.
(8) Vanadium: it can refine the grain structure of steel, improve the strength, toughness and wear resistance of steel. When it melts into austenite at high temperature, it can increase the hardenability of steel; otherwise, when it exists in carbide form, it will reduce its hardenability.
(9) Molybdenum: it can obviously improve hardenability and thermal strength of steel, prevent temper brittleness, and improve remanence and tenacity.
(10) Titanium: it can refine the grain structure of steel, so as to improve the strength and toughness of steel. In stainless seamless steel tube, titanium can eliminate or reduce intergranular corrosion.
(11) Nickel: it can improve the strength, toughness and hardenability of steel. When the content is high, some physical properties of steel and alloy can be changed significantly, and the corrosion resistance of steel can be improved.
(12) Boron: when there is a small amount of boron (0.001-0.005%) in the steel, the hardenability of the steel can be doubled.
(13) Aluminum: it can refine the grain structure of steel, inhibit the aging of low carbon steel, improve the toughness of steel at low temperature, improve the oxidation resistance of steel, improve the wear resistance and fatigue strength of steel, etc.
(14) Copper: its outstanding role is to improve the atmospheric corrosion resistance of ordinary low alloy steel, especially when it is used in combination with phosphorus.