Hangbo Alloy Group
Shanghai · Est. 2012
N07500 technical guide: nominal chemical composition, mechanical and physical properties, corrosion resistance, welding, product forms and ASTM standards...
Udimet 500 (UNS N07500) is a nickel-chromium-cobalt superalloy (γ′). γ′-strengthened Ni-Cr-Co turbine alloy. Excellent creep + fatigue to 750 °C. This guide covers its nominal chemical composition, typical mechanical and physical properties, corrosion behaviour, welding, common applications, available product forms and the ASTM standards that apply — everything a specifier needs to evaluate Udimet 500 for a project.
Udimet 500 belongs to the nickel-chromium-cobalt superalloy (γ′) class of materials. It is γ′-strengthened ni-cr-co turbine alloy. It is excellent creep + fatigue to 750 °c. It is classic disc & blade superalloy.
Nominal (wt%) composition of Udimet 500 (UNS N07500):
| Element | Composition (wt%) |
|---|---|
| Nickel (Ni) | Balance |
| Chromium (Cr) | 15.0 – 20.0 |
| Cobalt (Co) | 13.0 – 20.0 |
| Molybdenum (Mo) | 3.0 – 5.0 |
| Aluminium (Al) | 2.5 – 3.2 |
| Titanium (Ti) | 2.5 – 3.2 |
| Iron (Fe) | ≤ 4.0 |
| Carbon (C) | 0.08 – 0.20 |
| Boron (B) | ≤ 0.010 |
| Zirconium (Zr) | ≤ 0.10 |
Typical physical properties:
| Property | Value |
|---|---|
| Density | 8.05 g/cm³ |
| Melting Range | 1300 – 1360 °C |
| Thermal Expansion (20–1000 °C) | 14.0 µm/m·K |
| Thermal Conductivity (100 °C) | 11.5 W/m·K |
| Modulus of Elasticity | 208 GPa |
Typical room-temperature mechanical properties (annealed / specified condition unless noted):
| Property | Typical Value |
|---|---|
| Tensile Strength (Rm), aged | 1100 MPa (160 ksi) |
| Yield Strength, 0.2% (Rp0.2), aged | 800 MPa (116 ksi) |
| Elongation, aged | 15% |
| Hardness (Rockwell C), aged | 32 – 42 HRC |
| Property | Value |
|---|---|
| Creep rupture at 650 °C / 1000 h | ≈ 350 MPa |
| Service temperature | Up to 750 °C |
Udimet 500 is a γ′-precipitation-strengthened Ni-Cr-Co superalloy with high strength and good oxidation resistance to about 750 °C. It is a long-established disc and blade alloy for gas turbines, offering an excellent balance of creep, fatigue and corrosion resistance.
Welded/repair-welded with matching or overalloyed fillers under a strict qualified procedure including solution treat and age. As a high-strength superalloy, fabrication follows aerospace/ turbine specifications.
The grade is supplied to the following common specifications:
| Standard | Product Form / Scope |
|---|---|
| AMS 5751 | Bars & forgings |
| AMS 5388 | Castings |
| PWA / GE / Rolls-Royce specs | OEM turbine specs |
Standards & References. Specifications cited on this page; confirm current revisions with the issuing body.
General references: Nickel Institute · AMPP (corrosion) · SAE International · ASTM International
Udimet 500 (UNS N07500) is a γ′-precipitation-strengthened Ni-Cr-Co superalloy with high strength and good oxidation resistance to about 750 °C. It is a classic gas-turbine disc and blade alloy balancing creep, fatigue and corrosion resistance.
Aged: ≈ 1100 MPa tensile, ≈ 800 MPa yield, 15 % elongation, 32–42 HRC, with creep-rupture strength near 350 MPa at 650 °C / 1000 h.
Yes, with matching/overalloyed fillers under a strict qualified procedure including solution treat and age. Fabrication follows turbine OEM specs.
Gas-turbine discs, shafts and blades, aero-engine rotating parts, industrial turbine hot-section components and high-temperature bolting.
718 is a more weldable, lower-temperature precipitation alloy (discs/shafts to ~650 °C). Udimet 500 runs hotter (to ~750 °C) with higher creep strength but is less fabrication-friendly.
Bars/forgings AMS 5751, castings AMS 5388, with most production governed by OEM turbine specifications.
As a dedicated nickel alloy manufacturer serving aerospace, power generation sectors, Hangbo Alloy Group supplies the grades discussed here across all standard product forms with full ASTM/ASME documentation and EN 10204 3.1 certification. Our material is specified for applications where corrosion resistance, high-temperature strength, and traceable quality are non-negotiable. See our production & testing facilities for more on how every heat is verified.