INOX stainless steel or an alloy of iron with other elements: chromium, nickel, manganese, silicon, nitrogen, carbon … with a certain percentage. Material Stainless steel is resistant to oxidation and corrosion resistance very good chemistry. Resistance to oxidation and corrosion of stainless steel chemical composition depends on the compound in INOX, especially nickel (Ni). This feature may be due to the thin layer of chromium oxide on the surface of the material without chemical reactions with other elements in the air and water, have a protective effect on other components in INOX. Nickel and nitrogen (Ni) in stainless steel is also capable of antioxidant and create stability in the steel, but is not widely used due to scarcity and nitrogen Nickel is soluble in steel.
With the proportion of each element included in steel created different crystal structures, thus creating different properties between steel.
There are 4 main types of stainless steels are classified into the following groups: austenitic, ferritic, austenitic-ferritic (also called Duplex), and martensitic.
Common type of austenitic stainless steel. Includes INOX 301, 304, 304L, 316, 316L, 321, 310S … The main ingredient containing 7.0% nickel minimum, 16.0% chromium, Carbon 0:08%. This is material that is resistant to chemical corrosion, low infected and easy for bending, cutting, welding … This material is used in home appliances, containers, ornaments, manufacturing industrial materials (stainless steel industrial pipes, stainless steel sheets, bolts, screws, …), industrial ship industry, architecture, and construction.
INOX ferritic type of mechanical properties equivalent to mild steel, but potentially higher corrosion resistance. Includes INOX 430, 410, 409 … little material for industrial applications compared to austenitic. But can catch it in housewares, boilers, washing machines, indoor architecture, the screw … The main ingredient contains between 12.0% – 17.0% chromium.
Austenitic ferritic-(or Duplex) This type of steel has properties intermediate between ferritic and austenitic type. So there is the common name DUPLEX. Including LDX 2101, SAF 2304, 2205, 253MA. Duplex steel contains nickel less than the austenitic type. Duplex features high strength and durability flexibility widely used in petrochemical industry, paper, pulp, manufactured marine vessels … Because Nickel scarce materials are used many to replace austenitic steels: INOX 304, 304L, 316, 316L, 321, 310S.
Martensitic: contains about 11.0% to 13.0% Cr, bearing strength and hardness, corrosion resistance relative degree. Widely used to manufacture turbine blades, blades …
Here are some types of material, stainless steel (INOX) common: