Según la calidad y rendimiento de las tuberías de acero, Hemos resumido las propiedades de diferentes elementos metálicos contenidos.

Carbón: Cuanto mayor sea el contenido de carbono, Cuanto mayor sea la dureza de la tubería de acero, Pero cuanto peor sea la plasticidad y la dureza.

Azufre: Es una impureza dañina en tuberías de acero. Si el acero contiene un alto contenido de azufre, Es fácil volverse quebradizo a altas temperaturas, que generalmente se llama fragilidad caliente.

Fósforo: puede reducir significativamente la plasticidad y la tenacidad del acero., especialmente a bajas temperaturas. Este fenómeno se llama confusión fría. En acero de alta calidad, sulfur and phosphorus should be strictly controlled. On the other hand, the high content of sulfur and phosphorus in low carbon steel can make it easy to cut, which is conducive to improving the cutting performance of steel.

Manganese: it can improve the strength of steel, weaken and eliminate the adverse effects of sulfur, and improve the hardenability of steel. High alloy steel (high manganese steel) with manganese content has good physical properties such as wear resistance.

Silicon: It can improve the hardness of steel, but its plasticity and toughness decrease. But silicon can improve the soft magnetic properties.

Tungsten; It can improve the red hardness and thermal strength of steel, and improve the wear resistance of steel.

Chromium: It can improve the hardena, wear resistance, corrosion resistance and oxidation resistance of steel.

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, the hardenability of steel can be increased. On the contrary, when it exists in the form of carbide, its hardenability will be reduced.