1 chrome

Role of chromium in stainless steel decision: decision of stainless steel is only one element of this is chrome, each kind of stainless steel contains a certain number of chromium. To date, no chromium-containing stainless steels. Chrome is become the main elements determining properties of stainless steel, because after adding chromium as an alloying element in steel, its internal contradictions of sport to contribute to development of resistance to corrosion damage.

2 carbon

Duality in stainless steel

Carbon is one of the main elements of steel for industrial, properties and microstructure of the steel depends to a large extent and distribution of carbon content in steel form, carbon impact is particularly significant in stainless steel. Carbon in stainless steel on impact mainly in two aspects of the Organization, on the one hand the element carbon is stabilized austenitic, and the levels are large (about 30 times of nickel times), on the other hand because of the great affinity of carbon and chromium, and formation-complex series of chromium Carbide. So, from the strength and corrosion-resistant candle both, role of carbon and stainless steel are mutually contradictory.

3 nickel

Is the role of nickel in stainless steel and chromium into play only after

Nickel is the excellent corrosion resistance of materials, is also important for alloy steel alloying elements. Nickel is the formation of austenite in steel elements, but low-carbon nickel steel to obtain pure austenite organization, with nickel to hit 24%; only the nickel when 27% makes steel in corrosion-resistant performance changed significantly in some media. NI does not alone constitute a stainless steel. Nickel and chromium found in stainless steel at the same time, however, nickel-bearing stainless steel has many valuable properties.
Nickel is magnetic resistance elements, stainless steel cannot be a magnet to attract.

4 Ti and NB

Titanium or niobium intergranular corrosion in stainless steel is designed to prevent.

5 mo and CU

Molybdenum improves the corrosion resistance of stainless steel and copper.




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