Carbon (C): content of carbon is present in stainless steel. Carbon levels are often quite low with all of them except their stainless steel Martensitic. Carbon can be worn high efficiency. If the carbon combines with the chromium in CABIT, can cause damage "inert layer" formation. With the local area; If chromium levels decrease to less than 10.5% "inert layer" will not form.
Chromium (Cr): The Essence "inert" interpretation of stainless steel is due to chromium is highly reactive element. Thanks chromium stainless steel to withstand the effects of corrosion and oxidation typically occurs with unprotected carbon steel. Once the minimum chromium content of 10.5% at present there is an insoluble layer formed immediately clung to prevent oxidation of the surface diffusion and prevents oxidation of iron. The higher levels of chromium higher levels rust.
Nickel (Ni): Nickel is the main alloying element of stainless steel grade 300 Series. Presence of nickel austenite structure formation makes this steel grade strength, ductility and tough, even at temperatures mixed of cooling. Nickel is also non-magnetic material. While the role of nickel does not have a direct influence on the development of class "inert" on the surface, significantly improved the nickel withstand acid attack, particularly with sulfuric acid.
Molybdenum (Mo): Additive added molybdenum steels "Cr-Fe-Ni" will increase corrosion resistance locally holes and cracks better wear protection (especially with Ferritic steels Cr-Fe). Help fight the impact of molybdenum molybdenum chloride amount, the higher the level the higher chloride resistant. Molybdenum only in the high-grade steel like 315, 316, 316L, 317, 317L ...
Manganese (Mn): Manganese usually added to the stainless steel de-oxidation assist, while melting to prevent the formation of iron sulphide impurities can create cracking. Manganese compounds are also stable austenite steel grades and the high manganese content (from 4% -> 15%) would be replaced in the nickel steels serial200.
Silicon (Si): Silicon also improves antioxidant and stabilizer of ferrite steels. For austenitic stainless steels, high silicon content improves antioxidant and prevent the infiltration of carbon at high temperatures such as 309, 310 ...
Copper (Cu): content of elasticity helps to create cracks in the steel production process, used in the production process many items of household needs deep stamping and deep drawing. Conversely copper concentrations will reduce corrosion and oxidation resistance of stainless steel.
Phosphorus (P): is an alloy of copper, phosphorus is added as a reducing agent in the process of smelting oxygen, phosphorus also improves the fluidity of the molten alloy and thus improve casting and mechanical properties by the compact arrangement of grain boundaries.
Sulfur (S): Sulfur is often kept low by sulfur can create dirty. Sulfur is used to improve the processing capability. However, residual sulfur reduces resistance to corrosion holes.
All components on reference purposes only, depending on the actual per plant and steel production according to the needs and standards of each plant ingredients can change. In addition to the above components can also add other ingredients and additives such as nitrogen (N), niobium (Nb) ...