ZYTC Alloy, a professional Chinese cobalt alloy manufacturer and exporter, supplies premium CoCr28MoNi(2.4979,UNS R30075) cobalt-chromium alloy for high-temperature and high-creep industrial applications.
CoCr28MoNi, material number 2.4979, is a cobalt base alloy classified within nickel and cobalt superalloy family. This alloy features outstanding creep resistance under sustained high-temperature loading, making it a preferred choice for gas turbine components and other harsh operating environments. This grade has multiple cross-reference designations: DIN/EN CoCr28MoNi, BSI/AFNOR R 30021, UNS R30075. Its chemical composition consists mainly of cobalt, chromium, molybdenum, nickel, with controlled trace elements including manganese, silicon, phosphorus and sulfur.
Chemical Composition
| Element | Min | Max |
|---|
| Si | - | 1.0000 |
| S | - | 0.0300 |
| P | - | 0.0450 |
| Ni | 1.5000 | 3.0000 |
| Mo | 5.0000 | 6.0000 |
| Mn | - | 1.0000 |
| Cr | 27.0000 | 29.0000 |
| Co | - | - |
| C | 0.2500 | 0.3500 |
Mechanical Properties of steel grade CoCr 28 MoNi
Yield
Rp0.2(MPa) | Tensile
Rm(MPa) | Impact
KV/Ku (J) | Elongation
A(%) | Reduction in cross section on fracture
Z(%) | As-Heat-Treated Condition | Brinell hardness (HBW) |
|---|
| 647 (≥) | 888 (≥) | 22 | 11 | 44 | Solution and Aging, Annealing, Ausaging, Q+T,etc | 423 |
Physical Properties of steel grade CoCr 28 MoNi
Temperature
(°C) | Modulus of elasticity
(GPa) | Mean coefficient of thermal expansion 10-6/(°C) between 20(°C) and | Thermal conductivity
(W/m·°C) | Specific thermal capacity
(J/kg·°C) | Specific electrical resistivity
(Ω mm²/m) | Density
(kg/dm³) | Poisson’s coefficient, ν |
|---|
| 32 | - | - | | | 0.22 | - | |
| 365 | 772 | - | 33.3 | 441 | | - | |
| 394 | - | 23 | 44.2 | | | 311 | 132 |
Key Material Properties
- Excellent high-temperature creep resistance, retains mechanical integrity under long time thermal load
- Good hot corrosion and oxidation resistance at elevated working temperature
- High hardness and wear resistance
- Stable microstructure after heat treatment
- Suitable for casting processing for complex high-temperature components
Heat Treatment Specification for CoCr28MoNi (2.4979)
Solution heat treatment temperature range: 1020°C ~ 1080°C (1868°F – 1976°F)
Note: Original text unit error correction: The temperature range 1868°C -1181°C is converted Fahrenheit / Celsius mixed value; the standard solution treatment for CoCr28MoNi is 1020~1080℃. Heat treatment parameters can be adjusted according to product form and end-use requirements.
Applications- Gas turbine hot section components
- High-temperature wear-resistant cast parts
- Industrial furnace hardware
- Energy equipment components under high temperature & creep load
- Aerospace high-temperature structural castings
Available Product Forms from ZYTC Alloy- Investment cast components
- Bar / Round bar
- Plate & sheet
- Custom machined parts according to customer drawings
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Why Choose ZYTC Alloy for CoCr28MoNi / 2.4979
- Full material traceability: Every batch supplied with MTR material test certificates
- Strict chemical composition and mechanical property inspection before shipment
- Support small prototype order and mass bulk production
- Custom casting & precision cutting service
- Rich experience in export of cobalt superalloys for energy and aerospace industries
- Competitive factory price and reliable global delivery
- Professional material engineering team to support your material selection and heat treatment consultation
Get Quote
Contact ZYTC Alloy if you need CoCr28MoNi (2.4979 / UNS R30075) cobalt alloy. Send your drawing, dimension and application requirements, our engineers will provide material recommendation and formal quotation quickly.
