302 stainless steel belongs to the international stainless steel marking method. 302 stainless steel--S30210 (American AISI, ASTM). The corresponding Chinese grade of 302 is 12Cr18Ni9 .

The American Iron and Steel Institute uses three digits to designate various standard grades of malleable stainless steel. in:

①Austenitic stainless steel is marked with numbers of 200 and 300 series.

② Ferritic and martensitic stainless steels are represented by numbers in the 400 series. For example, some of the more common austenitic stainless steels

It is marked with 302, 304, 316 and 310.

③ Ferritic stainless steel is marked with 430 and 446, and martensitic stainless steel is marked with 410, 420 and 440C

Note, dual phase (austenite-ferrite).

④Stainless steel, precipitation hardening stainless steel and high alloys with iron content less than 50% usually use patent names or trade names.

C≤0.15

Mn≤2.00

Si≤1.00

P≤0.035

S≤0.030

Ni≤8.00-10.00

Cr≤17.00-19.00

①Density Density (20℃)/kg/dm3:7.93,

② Melting point/℃: 1398~1120,

③Specific heat capacity (0~100℃)/kg/(kg.k): 0.5,

④Thermal conductivity/w/(m.k)100℃-:16.3,

⑤ Thermal conductivity/w/(m.k)500℃-:21.5,

⑥Coefficient of linear expansion (10-6/k)0~100℃:" 17.3,

⑦Linear expansion coefficient/(10-6/k)0~504℃:18.7,

⑧ Resistivity (20℃) (Ω.mm2/m): 0.73,

⑨ Longitudinal elastic modulus (20℃)/GPa: 193,

⑩ Magnetic: none.

302 stainless steel application field: for structural steel and welded parts with low corrosion resistance, such as building exterior decoration, non-magnetic accompanying parts and components of low temperature devices can also be used. 302 stainless steel is suitable for food processing, storage and transportation. Has good processability and weldability.

Corrosion resistance

302 stainless steel provides useful corrosion resistance in a variety of moderately oxidizing to moderately reducing environments. This alloy is widely used in equipment and utensils for processing and handling food, beverages and dairy products. These alloys are also used in heat exchangers, pipes, tanks and other process equipment that come into contact with fresh water. In addition, a wide variety of applications involve household and industrial chemicals. These alloys contain 18% to 19% chromium to resist oxidizing environments such as dilute nitric acid. These alloys are also resistant to moderately aggressive organic acids such as yi acids and reducing acids such as phosphoric acid. More highly reducing environments, such as boiling dilute hydrochloric acid.

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