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Cr20Ni30

Fabrication method of cold drawn wire Cr20Ni30. provide similar structure, uniformity of protective oxide layer and high adhesion of this layer to the surfacc. With carbon reduction to «0.03% guarantee high plasticity of the wire, high creep strength, and also oxide re­sistance. sulfidization and carbonization at high temperatures. Fields of application:

Higher specific electric resistance Cr20Ni30 in comparison with Cr20Ni80 and also less specific weight let economize in correlation "ohmic resistance/value. kg".

Used in high temperature electric furnaces, firing furnaces and fire drying furnaces, different electrtc heaters, aeep resistance, ductility, (including after long exploitation), stability of the form and increased term of exploitation. Technical information

Cold drawn wire is produced from the alloy Cr20Ni30 grade is produced in soft heat-treated position diameter 0.1-10 mm.

Chemical composition. %

C

Cr

Ni

Si

Mn

Al

S

P

Fe

≤0.05

19.5-21.5

30-31

1.8-3.0

max 1.0

max 0.3

≤0.005

≤0.02

основа

 
 

Physical and mechanical properties

Breaking point. MPa

560 - 680

Yield Strength. MPa

250 - 350

Elongation. %

25-35

Density, g/cm3

7.9

Hardness. Hv

180

Melting temperature

1390C

Specific e.'ectrrc resistance μΩ/m at 20°C

1.04

Transmissibility in conditions absolute oxidation

0.08


Advantages: 

  • Not high density - 7.9 g/cm3 against 8.4 g/crn3 for Cr20Ni80. that let economize to 6% on the weight.
  • Temperature of exploitation and corrosion resistance in the air, vacuum, oxide, carbon and nitrogen-containing mediums, monia, in the humid air not worse than more expensive grade Cr20Ni80.
  • Excellent resistance in restorative and sulphur content mediums (in comparison with mchrome Cr20Ni80 and Cr15Ni60).