Carbon (c): When the carbon content increases, the yield point and tensile strength increase, but the plasticity and impact properties decrease. Too high carbon content will easily lead to unqualified intergranular corrosion. The boundary between steel and iron is controlled by the C content. 2.11% is steel and silicon (Si)
Si is a deoxidizer and desulfurizer with high strength and hardness, which can improve the hot workability of steel.
Chromium (Cr): Chromium significantly increases the strength, hardness and wear resistance of steel, but at the same time reduces ductility and toughness.
Nickel (Ni): Nickel can increase the strength of the steel, while maintaining good plasticity and toughness. Influence of Several Main Elements in Steel on Steel Properties

Molybdenum (Mo): The addition of molybdenum to steel can improve the mechanical properties of steel.
Titanium (Ti): Titanium is a deoxidizer in steel. Reduces pragmatic 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, which increases the cold brittleness of steel, makes welding performance worse, reduces plasticity, and makes cold bending performance worse. Generally, the lower the phosphorus content in steel is, 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 content of sulfur must be kept as low as possible.
Nitrogen (N): Nitrogen increases the strength, low temperature toughness and weldability of steel. Increase pragmatic sensitivity. An appropriate amount of nitrogen can improve the pitting corrosion resistance and strength of stainless steel.