Steel Pipe, also known as steel pipe, is usually made of various iron carbon alloy materials. In addition, other alloying elements and trace elements may be added according to different performance requirements. The following is a specific introduction:
Basic components
Iron (Fe): It is the main component of steel pipes, generally accounting for over 90%. Iron provides the basic strength and toughness for steel pipes, and its purity and lattice structure have a significant impact on the performance of steel pipes. For example, high-purity iron can give steel pipes better ductility and processability.
Carbon (C): It is one of the key elements that affect the performance of steel pipes, with a content usually between 0.05% and 1.5%. The higher the carbon content, the greater the strength and hardness of the steel pipe, but the toughness and weldability will decrease. For example, steel pipes used for high-pressure transportation may control the carbon content at a lower level to ensure good welding performance and fracture resistance.
alloying element
Manganese (Mn): Generally present in the range of 0.3% to 1.5%, it can improve the strength and toughness of steel pipes, enhance their impact resistance, and improve their thermal processing performance, making them easier to form during hot rolling and other processing.
Silicon (Si): usually contained in 0.1% -0.5%, can increase the strength and hardness of steel pipes, improve their heat resistance and oxidation resistance. Steel pipes used in some high-temperature environments may have an appropriate increase in silicon content.
Chromium (Cr): with a content of 0.5% -26%, it can significantly improve the corrosion resistance and oxidation resistance of steel pipes. For example, in stainless steel pipes, the chromium content is usually high, and the passive film formed can effectively prevent the steel pipe from being corroded.
Nickel (Ni): generally with a content of 3% -22%, it can improve the toughness, corrosion resistance, and low-temperature performance of steel pipes. Steel pipes used in low-temperature environments or highly corrosive media often contain nickel elements.
trace element
Molybdenum (Mo): The content is usually between 0.1% and 0.5%, which can improve the high-temperature strength, corrosion resistance, and creep resistance of steel pipes. Molybdenum plays a particularly important role in high-temperature and high-pressure chemical pipelines.
Vanadium (V): generally with a content of 0.05% -0.2%, it can refine grain size, improve the strength and toughness of steel pipes, and enhance their wear resistance and fatigue resistance.
