Nickel-Chromium Alloys
The common grades of Nickel-Chromium alloys are 0Cr20Ni80, 0Cr30Ni70, 0Cr15Ni60, 0Cr20Ni35, 0Cr20Ni30.
| Grades | Chemical Composition, % | ||
| Ni | Cr | Fe | |
| 0Cr20Ni80 | Remainder | 20.0-23.0 | 1.0 max. |
| 0Cr30Ni70 | Remainder | 28.0-31.0 | 1.0 max. |
| 0Cr15Ni60 | 55.0-61.0 | 15.0-18.0 | Remainder |
| 0Cr20Ni35 | 34.0-37.0 | 18.0-21.0 | Remainder |
| 0Cr20Ni30 | 30.0-34.0 | 18.0-21.0 | Remainder |
| Grades | Maximum usable temperature | Melting point | Density | Electrical resistivity | Ductility | Specific heat | Heat conductivity coefficient | Expansion coefficient | Microscopic structure | Magnetism |
| ℃ | ℃ | g/cm3 | μΩ•n, 20℃ | % | J/g.℃ | KJ/m.h℃ | a×10-6/℃ (20-1000℃) | |||
|
0Cr20Ni80 |
1200 | 1400 | 8.40 | 1.09±0.06 | 20 min. | 0.440 | 60.3 | 18.0 | austenite | Non- magnetic |
| 0Cr30Ni70 | 1250 | 1380 | 8.10 | 1.18±0.05 | 20 min. | 0.461 | 45.2 | 17.0 | austenite | Non- magnetic |
| 0Cr15Ni60 | 1150 | 1390 | 8.20 | 1.11±0.05 | 20 min. | 0.494 | 45.2 | 17.0 | austenite | Non- magnetic |
| 0Cr20Ni35 | 1100 | 1390 | 7.90 | 1.04±0.05 | 20 min. | 0.500 | 43.8 | 19.0 | austenite | Non- magnetic |
| 0Cr20Ni30 | 1100 | 1390 | 7.90 | 1.04±0.06 | 20 min. | 0.500 | 43.8 | 19.0 | austenite | Non- magnetic |
0Cr20Ni80
0Cr20Ni80 contains 20% Cr and 80% Ni, which has strong corrosion resistance. The allowable operating temperature of the alloy is 1200 ° C. 0Cr20Ni80 has the advantages of good oxygen resistance, high strength, non-magnetic, high emissivity, good corrosion resistance, no softening, no deformation, and low permanent elongation.
0Cr30Ni70
Cr30Ni70 high hardness stainless steel is a Invar alloy with low creep fracture resistance developed in Sweden. Its solution treatment temperature is about 1267 degrees, and the structure has 21%-61% ferrite and 61%-54% carbonization resistance and stability, which has the common characteristics of the var alloy. It is a feature with carbon resistance and low price. Duplex stainless steel developed to replace 2507 and S48140 commonly used duplex stainless steel with anti-sensitization properties.
Cr30Ni70 features: nickel-chromium, nickel-chromium ferroelectric alloy wire has high temperature oxidation resistance, high strength, no softening and a series of advantages. When used for a long time, it does not deform and has a small permanent elongation, among which Cr30Ni70 alloy has excellent comprehensive characteristics, and is the first choice for making high-quality electric heating elements. The products are widely used in industrial electric furnace, metallurgy, machinery, household appliances and other industries to make heating elements and resistance elements.
0Cr15Ni60
60Ni-15Cr has high nickel and chromium content, less iron content, and has good oxidation resistance, thermal strength and positive temperature coefficient below 900 ° C. At room temperature, it has high plasticity, cold stamping and welding performance. After solid solution treatment, the alloy is single-phase austenite, and the tissue is stable during use. The Cr15Ni60 alloy has a single-phase austenite structure.
0Cr20Ni35
35Ni-20Cr has high nickel and chromium content, high silicon content, and has good oxidation resistance, thermal strength and high positive temperature coefficient below 800 ℃. At room temperature, it has high plasticity, cold stamping and welding performance. After solid solution treatment, the alloy is single-phase austenite, and the tissue is stable during use.
