Effects of several main elements in steel on steel properties • Carbon (c): As the carbon content increases, the yield point and tensile strength increase, but the plasticity and impact properties decrease. Excessive carbon content can easily cause intergranular corrosion failure. The boundary between steel and iron is controlled by C content: less than 2.11% is steel. • Silicon (Si): Si is a deoxidizer and desulfurizer. It has high strength and hardness and can improve the hot working performance of steel. • Chromium (Cr): Chromium can significantly increase the strength, hardness and wear resistance of steel, but at the same time reduces plasticity and toughness. • Nickel (Ni): Nickel can improve the strength of steel and maintain good plasticity and toughness. The influence of several main elements in steel on steel properties • Molybdenum (Mo): Adding molybdenum to steel can improve the mechanical properties of steel. • Titanium (Ti): Titanium is a deoxidizer in steel. Reduces effectiveness sensitivity and cold brittleness. Adding a certain amount of titanium to steel has the ability to resist intergranular corrosion. • Phosphorus (P): Phosphorus is a harmful element in steel. It increases the cold brittleness of steel, worsens welding performance, reduces plasticity, and worsens cold bending performance. Normally, the lower the phosphorus content in steel, the better. • Sulfur (S): Sulfur is a harmful element in steel, which makes the steel hot brittle, reduces the ductility and toughness of the steel, easily causes cracks during forging, and also reduces the corrosion resistance of the steel. Therefore, the sulfur content must be kept as low as possible. • Nitrogen (N): Nitrogen can improve the strength, low temperature toughness and weldability of steel. Increase effectiveness sensitivity. An appropriate amount of nitrogen can improve the pitting corrosion resistance and strength of stainless steel.
