1. Phosphorus is dissolved in ferrite, and the strength and NMness of the wing plate steel increase, but the plasticity and toughness decrease significantly, especially at low temperatures, even if the cold brittleness of the steel;
2. Boron is considered to be a grain boundary strengthening and purifying element, which can improve the plasticity of wing steel or alloy. However, a large amount of boron is easy to form secondary precipitation, which precipitates along grain boundaries, which reduces the plasticity of steel.
3. Tungsten is a typical carbide forming element, which mainly plays a role in the formation of carbide, which affects the plasticity of tungsten to steel, depending on the amount, size and distribution of carbide;
4. Nitrogen is dissolved in ferrite, when the steel is rapidly cooled at 200~250 °C, nitride precipitation will occur, the NMness and strength of the wing steel will increase, and the plasticity and toughness will be greatly reduced, even if the blue brittleness of the steel (aging embrittlement); The carbon content of cold-drawn flattened steel is within the forging temperature range. If it is completely soluble in austenite, it has little effect on the plasticity of steel. Only when the carbon content in the steel is high, due to the more cementite, and even the cementite precipitation in the solid solution, the plasticity of the wing plate steel will be greatly reduced.