With our aerospace-grade Nimonic 75 (UNS N06075) alloy sheets, you can process with complete confidence. These sheets are specifically designed for aero-engine combustor bushings, offering exceptional plasticity to meet complex deep drawing and multi-stage stamping requirements. As a leading high-temperature alloy supplier, Gnee Steel offers Nimonic 75 (technically equivalent to EI435/GH3030) with a stable microstructure, ensuring zero-defect forming and excellent weld stability, suitable for critical aerospace components.
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The actual difference between Nimonic 75 (solid solution) and Nimonic 80A
The actual difference between Nimonic 75 (solid solution) and Nimonic 80A
The real difference between Nimonic 75 and Nimonic 80A lies in their metallurgical structure and hardening mechanism, which determine their respective strengths and ideal applications. Although both are nickel-chromium based alloys, Nimonic 75 is a solid solution-strengthened alloy optimized for formability, while Nimonic 80A is a precipitation-strengthened alloy designed for high stress and high-temperature strength.
What is NIMONIC 75?
Nimonic 75 is a nickel-chromium alloy with good corrosion resistance and heat resistance, and it also contains added titanium and carbon. Originally used in the 1940s for manufacturing turbine blades, Nimonic 75 is easy to machine and weld, and is now more widely used in gas turbines, industrial furnaces, and nuclear engineering.
1. Nimonic 75 Introduction
Nimonic 75 is a high-performance nickel-chromium alloy. Nimonic 75 exhibits good mechanical properties, low creep, and high-temperature oxidation resistance. Titanium is one of the key factors in improving the overall strength of the alloy.
Nimonic 80A Introduction
Nimonic 80A is an age-hardening nickel-chromium alloy. This alloy is produced through a precipitation hardening process with the addition of titanium and aluminum. Alloy 80A exhibits excellent corrosion resistance, high tensile strength and creep rupture strength, and good oxidation resistance.
2. Differences in Chemical Composition of Nimonic 75 and Nimonic 80A
| Element | Nimonic 75 (Min %) | Nimonic 75 (Max %) | Nimonic 80A (Min %) | Nimonic 80A (Max %) |
|---|---|---|---|---|
| Carbon | 0.080 | 0.150 | 0.080 | 0.150 |
| Chromium | 18.000 | 21.000 | 18.000 | 21.000 |
| Silicon | -- | 1.000 | -- | 1.000 |
| Copper | -- | 0.500 | -- | 0.200 |
| Iron | -- | 5.000 | -- | 3.000 |
| Manganese | -- | 1.000 | -- | 1.000 |
| Titanium | 0.200 | 0.600 | 1.800 | 2.700 |
| Aluminium | -- | -- | 1.000 | 1.800 |
| Cobalt | -- | -- | -- | 2.000 |
| Boron | -- | -- | -- | 0.008 |
| Zirconium | -- | -- | -- | 0.150 |
| Lead | -- | -- | -- | 0.0025 |
| Sulphur | -- | -- | -- | 0.015 |
| Nickel | remainder | remainder | -- | remainder |
3. Mechanical properties of Nimonic 75 (annealed forming)
| Property | Value | Why It Matters for You |
|---|---|---|
| Tensile Strength (Rm) | ≥ 685 MPa | High structural safety at 800°C |
| Yield Strength (Rp 0.2) | ≥ 275 MPa | Lower press force needed for forming |
| Elongation (A5) | ≥ 35% (Typical 40%+) | No cracking during deep drawing |
| Hardness (HBW) | ≤ 200 | Extends the life of your stamping dies |
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4. Nimonic 75 and Nimonic Detailed Comparison
Nimonic 75 (Solid Solution):
* Structure: Primarily a nickel-chromium alloy, possessing good mechanical properties, high-temperature oxidation resistance, and excellent machinability.
* Maximum Temperature: Up to 1050°C, suitable for applications with low performance and oxidation resistance requirements.
* Applications: Combustion chambers, heat shields, industrial furnace components, internal components of nuclear reactors.
Nimonic 80A (Precipitation Hardening):
* Structure: Strengthened nickel-chromium alloy by adding Al and Ti to form Ni3(Al, Ti) precipitates.
* Maximum Temperature: Excellent creep resistance and oxidation resistance, up to 815°C.
* Applications: Gas turbine blades, bolts, fasteners, exhaust valves for racing engines. AZoM+5
In short, for easy processing, moderate strength, and suitability for highly oxidizing environments, choose Nimonic 75; for excellent creep resistance and high tensile strength, choose Nimonic 80A.
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FAQ
Q1: Does your Nimonic 80A come in the "Solution Treated" or "Fully Aged" condition?
A: We offer both. For customers who need to perform extensive machining, we recommend the Solution Treated condition (easier on tools). For customers ready for assembly, we provide Fully Aged bars with guaranteed hardness and creep strength.
Q2: Why is the price of Nimonic 80A higher than Nimonic 75?
A: The higher price reflects the more complex VIM+ESR melting required to control reactive Al and Ti levels, as well as the extended heat treatment cycles needed to precipitate the γ′ phase.
Q3: Do you provide MTC 3.1 for all export orders?
A: Absolutely. As a certified China superalloy mill, every order is accompanied by an EN 10204 3.1 Mill Test Certificate, documenting chemical analysis, mechanical verification, and 100% UT testing.