GH3030 Nickel Alloy
GH3030 is a nickel based, solid solution strengthened high temperature alloy. Nickel forms the balance, with 19.0% to 22.0% chromium, 0.15% to 0.35% titanium, and smaller amounts of aluminum and iron. The source describes good thermal strength and ductility below 800℃, together with oxidation resistance, thermal fatigue resistance, and weldability. Solution treatment produces a single phase austenitic structure that remains stable in long term service. Its straightforward composition and workability suit load bearing parts and oxidation resistant structures used at elevated temperature.
Product details
Chemical composition
| GH3030 | C | Si | Mn | P | S | Ni | Cr | Ti | Cu | Al | Co | B | Fe |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| min | 0.08 | – | – | – | – | – | 18.0 | 0.2 | – | – | – | – | – |
| max | 0.15 | 1.0 | 1.0 | 0.02 | 0.015 | Bal | 21.0 | 0.6 | 0.5 | 0.3 | 5.0 | 0.006 | 5.0 |
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Grade equivalents
| English Item | UNS | W.Nr. | JIS | GB/T | Other Grades |
|---|---|---|---|---|---|
| Nimonic 75 Nimonic 75A HAYNES 75 Alloy 75 | N06075 | 2.4951 2.4630 | – | GH3030 GH30 | NiCr20Ti Nicrofer 7520 ЭИ435 XH78T |
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Physical properties
| Density g/cm³ | 8.4 |
|---|---|
| Melting range ℃ | 1374~1420 |
| Thermal conductivity (100℃) λ/(W/m•℃) | 15.1 |
| Specific heat J/kg•℃ | 565.2 |
| Elastic modulus GPa | 200 |
| Electrical resistivity μΩ•m | 1.099 |
| Linear expansion coefficient a/10-6℃-1 | 12.8(20~100℃) |
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Mechanical properties
| Tensile strength Rm N/mm | ≥590 |
|---|---|
| Yield strength RP0.2 N/mm | ≥295 |
| Elongation % | ≥30 |
| Hardness HB | ≤321 |
| *After solution heat treatment | |
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Applications
- Turbine-engine combustion components, afterburner structures, and casing mounting flanges
- High-temperature and corrosion-resistant reactors, furnaces, valves, and piping systems
- Boiler tubes in thermal power plants, nuclear-reactor internals, and receiver tubes for concentrated solar power
- Turbochargers, exhaust-system components, and high-temperature fasteners for high-performance engines
- High-temperature, high-pressure offshore equipment, subsea pipelines, and corrosion-resistant structures
- Waste-incinerator combustion chambers and corrosion-resistant components in wastewater treatment systems
- Radiators, semiconductor packaging materials, and precision-instrument components used at high temperature
Available product forms
- Round Bar
- Wire
- Forgings
- Plate
- Strip
- Seamless Pipe
- Welded Pipe
- Capillary Tube
- Flanges
- Pipe Fittings
- Non-standard Custom Parts
Values follow the Milike materials catalogue and are provided for preliminary review. Confirm the applicable purchase specification, heat treatment condition, and inspection requirements before final material selection.
- Heat and batch traceability
- PMI testing available
- Cut-to-size processing
- Material certificates on request
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