Seamless steel pipe is composed of various elements in steel, these elements in accordance with the different proportion of combination, constitute the different mechanical properties of seamless steel pipe, any kind of element will directly affect the number of mechanical properties of seamless steel pipe.What role do these elements play in the composition of steel?Let us have a look at the impact of seamless steel tube performance of the various elements:
Carbon (c) : the carbon content increases, the yield point and tensile strength increase, but the plasticity and impact properties decrease, and the high carbon content will easily lead to the unqualified intergranular corrosion.The boundary between steel and iron is controlled by the content of C: <2.11% is steel
Silicon (Si) : Si is a deoxidizer and desulfurizer, which has high strength and hardness and can improve the hot working performance of steel.
Chromium (Cr) : chromium can significantly improve the strength, hardness and wear resistance of steel, but will reduce the plasticity and toughness.
Nickel (Ni) : nickel can improve the strength of steel, but also can make steel maintain good plasticity and toughness.
Molybdenum (Mo) : adding molybdenum into steel can improve its mechanical properties.
Titanium (Ti) : titanium is a deoxidizer in steel.Reduced sensitivity and cold brittleness.The addition of a certain amount of titanium in steel has the ability to resist intergranular corrosion.
Phosphorus (P) : phosphorus is a harmful element in steel, which can increase the cold brittleness of steel, deteriorate the welding performance, reduce the plasticity and deteriorate the cold bending performance.In general, the lower the phosphorus content in steel, the better.
Causes cracks and reduces corrosion resistance of the steel.So the sulfur content has to be kept as low as possible.
Nitrogen (N) : nitrogen improves the strength, low temperature toughness and weldability of steel.Increased effectiveness sensitivity.Proper nitrogen can improve the corrosion resistance and strength of stainless steel.
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