Classification and characteristics of stainless steel

Stainless steel (also known as stainless steel) is a type of iron alloy which contains a minimum of 10.5% chromium. Inox less prone to corrosion and discoloration in the environment such as air or water … Stainless steel is used widely in industry and life. Equipment, utensils, stainless steel appliances has become very close to each of us.

In addition to chromium we also added some other metal elements to increase the steel’s ability to work in different conditions. For example, nickel increases resistance to corrosion and acids soften the steel, Nito create stability for stainless steel when working in cold environments …

Stainless steel is resistant to oxidation and corrosion is very high, but the choice of the right type and their specifications to fit into each specific case is very important.

Classification of stainless steel:

Austenitic: Stainless steel is the most common. The striking steel grade SUS 301, 304, 304L, 316, 316L, 321, 310S … this type containing a minimum 7% nickel, 16% chromium, carbon (C) 12:08% max. Such components created for this steel has high corrosion resistance in a wide temperature range rather, not magnetized, flexible, pliable, easy to weld. This steel is used to make many household items, tanks, industrial pipes, industrial ships, exterior architecture, construction works …

Ferritic: the stainless steel has mechanical properties similar to mild steel (low carbon steel), but is likely to be higher than the mild steel corrosion. Under this line may include the steel grade SUS 430, 410, 409 … this type containing approximately 12% – 17% chromium. This category, with 12% Cr more often in architectural applications. Type containing approximately 17% chromium is used for household appliances, boilers, washing machines, the architecture of the house …

Austenitic ferritic-(Duplex): This type of steel neutral nature and austenitic ferritic type between two known collectively as DUPLEX. Under this line may include LDX 2101, SAF 2304, 2205, 253MA. Duplex steel contains less than Ni austenitic type. DUPLEX with typical characteristics are high strength and durability flexibility widely used in petrochemical industry, paper, pulp, manufactured marine vessels … Given the escalating price of stainless steel due to the scarcity of nickel DUPLEX lines are increasingly more applications to substitute for some grades of austenitic steels such as SUS line 304, 304L, 316, 316L, 310S …

Martensitic: this type contains about 11% to 13% Cr, bearing strength and hardness, corrosion resistance relative degree. Widely used to manufacture turbine blades, blades …

General characteristics of stainless steel:

Compared with low carbon steel, the stainless steel:

· High Speed ​​Forging hardening

· The more deocao

· The more Bencao cungvado

· Higher hot Reliability

· Higher corrosion resistance

· High toughness at low temperatures better

· Reaction from inferior (only austenitic steels)

· The fact that the right properties for austenitic steel and can vary quite a lot for their steel and other steel.

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