In high-temperature engineering, data-driven material selection is the only way to ensure safety and performance. Our Nimonic 75 (UNS N06075) performance report highlights its superior tensile strength and ductility at both room and high temperatures. Unlike standard heat-resistant steels, Nimonic 75's stable microstructure prevents grain coarsening and embrittlement at 800°C, ensuring long-term durability in burner components, heat treatment trays, and aerospace parts.
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Nimonic 75 Mechanical Performance Guide
Nimonic 75 Mechanical Performance Guide
Nimonic 75 (UNS NO6075 / DIN 2.4630, 2.4951) is an 80/20 nickel-chromium alloy with controlled additions of titanium and carbon, designed for high-temperature applications requiring oxidation resistance and moderate strength. Originally developed in the 1940s for gas turbine engineering, it is characterized by excellent formability, creep resistance, and stable mechanical properties at temperatures up to 1000°C (1830°F).
What is the yield strength of NIMONIC 75?
Yield strength: 152 MPa. Tensile strength: 286 MPa. Elongation: 75%
1. Nimonic 75 Chemical Composition (%)
| Nickel (Ni) | Chromium (Cr) | Titanium (Ti) | Iron (Fe) | Manganese (Mn) |
| Balance (≥75%) | 19.0 - 21.0 | 0.20 - 0.60 | ≤ 5.0 | ≤ 1.0 |
2. Nimonic 75 Mechanical Properties (Verified Data)
| Property | Room Temperature (20°C) | High Temperature (800°C) |
| Tensile Strength (Rm) | ≥ 685 MPa | ≥ 210 MPa (Stable) |
| Yield Strength (Rp0.2) | ≥ 275 MPa | ≥ 120 MPa |
| Elongation (A5) | ≥ 35% (Exceptional) | ≥ 45% (High Ductility) |
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3. High Temperature Performance
Operating Temperature: Effective operating temperature up to 1000°C (1830°F).
Oxidation Resistance: Excellent oxidation and scaling resistance, especially in air, up to 1100°C (2012°F).
Creep Resistance: While its strength at extremely high temperatures is not as high as age-hardening grades such as Nimonic 80A, it exhibits stable creep resistance, making it suitable for burners and sheet metal components.
Strength Retention: Retains significant strength even after prolonged exposure to high temperatures.
4. Nimonic 75 Physical Properties
Density: 8.37 g/cm³ (0.302 lb/in²).
Melting Point Range: 1340°C - 1380°C (2450°F - 2520°F).
Thermal Conductivity: 11.7 W/m·C (at 20°C) (81.1 Btu·in/ft²·h·°F at 68°F)
5. Typical Applications of Nimonic 75 Alloy
Aerospace: Gas turbine combustors, flame tubes, exhaust systems, and casings.
Industry: Heat treatment equipment, furnace components, heat treatment processes, and industrial furnaces.
Nuclear Energy: Engineering components.
6. Gnee Steel Factory Test Certificate (MTC)
As a professional nickel alloy manufacturer, Gnee Steel eliminates the risks associated with high-temperature alloy material supply for you:
✅️VIM + ESR Dual Melting: Ensures ultra-high purity and zero internal defects.
✅️100% Ultrasonic Testing (UT) and Eddy Current Testing (ET): Every bar and tube undergoes eddy current and ultrasonic testing to ensure zero microcracks.
✅️Certification: Provides a comprehensive factory test certificate (MTC) conforming to EN 10204 3.1, detailing chemical composition analysis and mechanical property verification.
GH3030 certificate
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FAQ
Q1: Does Nimonic 75 become brittle after long-term service at 800°C?
A: No. Nimonic 75 is a solid-solution strengthened alloy. Its microstructure is inherently stable. Unlike age-hardened alloys (like Nimonic 80A), it does not experience "over-aging" or significant loss of ductility over time.
Q2: Can Nimonic 75 be used in high-pressure gas environments?
A: Yes. Nimonic 75 maintains excellent structural integrity. However, for extreme high-pressure rotating parts, we may recommend Nimonic 80A for its higher creep strength. For non-rotating structural pipes, Nimonic 75 is the most cost-effective choice.
Q3: What is the benefit of the Titanium (Ti) content?
A: The 0.2-0.6% Titanium addition acts as a grain refiner. It pins grain boundaries, preventing them from moving and coarsening under high heat, which is the primary reason Nimonic 75 outlasts generic nickel alloys.