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Silicon (Si): silicon additive in steel-making process as the reducing agent and deoxidizer, so calm steel containing 0.15 - 0.30% silicon. If the content of silicon steel is more than 0.50-0.60%, even if the silicon alloy elements. Silicon could significantly improve the elastic limit of steel, yield point and tensile strength, it is widely used for spring steel. Join 1.01.2% silicon in the quenched and tempered steel, strength is improved by 15 to 20%. Silicon and molybdenum, tungsten, chromium and so on, has the function of improving corrosion resistance and oxidation resistance, can manufacture heat-resistant steel. Low carbon steel containing silicon 1 - 4%, with high permeability, used in electrical industry as silicon steel sheet. The increase of silicon content, will reduce the steel welding performance.
Manganese (Mn): in the steel-making process, manganese is deoxidizer and desulfurizer good, general steel containing manganese 0.30 - 0.50%. In plain carbon steel adding more than 0.70% even "steel", than the general steel amount of steel not only has enough toughness, and high strength and hardness, improve hardenability steel, heat processing and improve the performance of the steel, such as 16Mn steel than A3 high 40% yield point. Has the extremely high wear resistance of manganese containing 11 - 14% of steel, for the excavator bucket, ball mill lining board. Manganese content increased, weaken the steel corrosion resistance, reduce the welding performance.
Titanium (Ti): titanium is steel strong deoxidizing agent. It can make the steel internal organization is compact, grain refining capacity; reduce the aging sensitivity and cold brittleness. To improve the welding performance. Add appropriate titanium in chromium 18 nickel 9 austenitic stainless steel, which can avoid the intergranular corrosion.