Product description
A517 Grade B steel is a kind of boiler steel It has high strength, good plasticity, toughness and welding A517 B plate is used for nuclear power plant mechanical module supports, boilers, pressure vessels and so
The chemical composition and smelting analysis of B steel plate are as follows
C: Mn: P≤ S≤ Si: Cr: Mo: B≤ V: Ti:
A517 Grade B steel chemical elements
Carbon (C): The carbon content in the steel increases, the yield point and tensile strength increase, but the plasticity and impact resistance When the carbon content exceeds , the weldability of the steel deteriorates, so it is used for For low-alloy structural steels, the carbon content generally does not exceed . High carbon content also reduces the atmospheric corrosion resistance of High carbon steel in the open yard is susceptible to corrosion; in addition, carbon can increase the cold brittleness and age sensitivity of
Silicon (Si): Silicon is added as a reducing agent and a deoxidizing agent during the steel making process, so the killed steel contains of If the silicon content in the steel exceeds , silicon is an alloying Silicon can significantly improve the elastic limit of steel, yield point and tensile strength, so it is widely used as spring Adding silicon to the quenched and tempered structural steel increases the strength by 15-20%. Silicon combined with molybdenum, tungsten, chromium, , has the effect of improving corrosion resistance and oxidation resistance, and can manufacture heat-resistant Silicon-containing 1-4% low carbon steel, with a very high magnetic permeability, used in the electrical industry to make silicon steel An increase in the amount of silicon reduces the weldability of the
Manganese (Mn): In the process of steel making, manganese is a good deoxidizer and desulfurizer, and the general steel contains of When adding more than of carbon steel, even if it is "manganese steel", it has more toughness than ordinary steel, and has higher strength and hardness, improves the quenchability of steel, and improves the hot workability of For example, 16Mn steel is 40% higher than the A3 yield 11-14% manganese containing steel has extremely high wear resistance, used in excavator buckets, ball mill liners, The increase in the amount of manganese weakens the corrosion resistance of the steel and reduces the
d, phosphorus (P): In general, phosphorus is a harmful element in steel, which increases the cold brittleness of steel, deteriorates the welding performance, reduces the plasticity, and deteriorates the cold bending Therefore, it is usually required that the phosphorus content in the steel is less than , and the demand for high-quality steel is
e, sulfur (S): sulfur is also a harmful element under normal The steel is made to be hot brittle, reduce the ductility and toughness of the steel, and cause cracks during forging and Sulfur is also detrimental to weldability and reduces corrosion Therefore, the sulfur content is usually required to be less than , and the high-quality steel is required to be less than . The addition of sulfur to the steel improves the machinability and is commonly referred to as free-cutting
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Fannie Yang
BEBON Iron & Steel , Ltd
1827
