GH3128 Nickel Alloy
GH3128 is a nickel based, solid solution strengthened high temperature alloy. Nickel forms the balance, with 19.0% to 22.0% chromium, 9.0% to 11.0% molybdenum, 2.0% to 3.0% tungsten, and smaller additions of boron, cerium, and zirconium. Tungsten and molybdenum provide solid solution strengthening, while the grain boundary additions support creep strength and oxidation resistance. The source compares its overall properties favorably with GH3044 and GH3536 and lists continuous service up to 950℃ for load bearing and oxidation resistant components.
Product details
Chemical composition
| GH3128 | C | Si | Mn | P | S | Ni | Cr | Mo | W | Ti | Al | Fe | Zr | B | Ce |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| min | – | – | – | – | – | – | 19 | 7.5 | 7.5 | 0.4 | 0.4 | – | – | – | – |
| max | 0.05 | 0.8 | 0.5 | 0.013 | 0.013 | Bal | 22.0 | 9.0 | 9.0 | 0.8 | 0.8 | 2.0 | 0.06 | 0.005 | 0.05 |
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Grade equivalents
| English Item | UNS | W.Nr. | JIS | GB/T | Other Grades |
|---|---|---|---|---|---|
| – | – | – | – | GH3128, GH128, Red Star No. 11 | – |
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Physical properties
| Density g/cm³ | 8.81 |
|---|---|
| Melting range ℃ | 1340~1390 |
| Thermal conductivity (100℃) λ/(W/m•℃) | 11.3 |
| Specific heat J/kg•℃ | 208 |
| Elastic modulus GPa | 208 |
| Electrical resistivity μΩ•m | 1.37 |
| Linear expansion coefficient a/10-6℃-1 | 11.25(20~100℃) |
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Mechanical properties
| Tensile strength Rm N/mm | ≥735 |
|---|---|
| Yield strength RP0.2 N/mm | ≥320 |
| Elongation % | ≥40 |
| Hardness HB | – |
| *After solution heat treatment | |
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Applications
- Flame tubes in aircraft-engine combustors, afterburner casings, and regulating vanes
- Combustion-chamber structures and high-temperature turbine components
- High-temperature, high-pressure reactors, heat exchangers, and corrosion-resistant piping systems
- Internals for high-temperature gas-cooled nuclear reactors
- Superheaters and steam piping in thermal power plants, and receiver tubes for concentrated solar power
- High-temperature components in marine gas turbines and corrosion-resistant propulsion systems
- Waste-incinerator combustion chambers and corrosion-resistant components in industrial waste-gas treatment equipment
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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