NIMONIC Alloy 75,Nickel-Chromium Alloy; UNS N06075;，1

### **Product Introduction: NIMONIC® Alloy 75 (UNS N06075)** **NIMONIC® Alloy 75** is a solid-solution strengthened nickel-chromium alloy developed for high-temperature service. It represents one of the earlier members of the renowned Nimonic series of superalloys, specifically designed to maintain excellent strength and resist oxidation at elevated temperatures. While newer precipitation-hardenable alloys have been developed for higher stress applications, Nimonic 75 remains a reliable and cost-effective choice for components operating at temperatures up to 950°C (1742°F). This alloy offers a favorable combination of good mechanical properties, outstanding resistance to oxidation and corrosion, and excellent fabricability. It is particularly valued for its stability and performance in oxidizing atmospheres, making it a enduring material for various industrial heating and aerospace applications. --- ### **International Standards & Material Equivalents** NIMONIC Alloy 75 is standardized across several key international specifications. | Standard Type | Standard Number | Designation / Product Form | | :--- | :--- | :--- | | **UNS (USA)** | **N06075** | **NIMONIC Alloy 75** | | **BS (UK)** | **HR 501** | Plate, Sheet, and Strip | | **AMS (Aerospace)** | **5754** | Wire | | **DIN (Germany)** | 17742 | NiCr20Ti | | **Werkstoff Nr.** | **2.4630** | **2.4630** | | **AFNOR (France)** | NC20T | | > **Note:** NIMONIC is a registered trademark. The primary identifiers are **UNS N06075** and **Werkstoff 2.4630**. --- ### **Chemical Composition** The composition is designed to provide solid-solution strength and form a protective oxide scale. | Element | Content (%) | | :--- | :--- | | **Nickel (Ni)** | Balance | | **Chromium (Cr)** | 18.0 - 21.0 | | **Iron (Fe)** | 5.0 max. | | **Titanium (Ti)** | 0.2 - 0.6 | | **Carbon (C)** | 0.10 - 0.15 | | **Silicon (Si)** | 1.00 max. | | **Manganese (Mn)** | 1.00 max. | | **Copper (Cu)** | 0.50 max. | --- ### **Physical Properties** Nimonic 75 exhibits physical properties suitable for high-temperature applications. | Property | Value | | :--- | :--- | | **Density** | 8.35 g/cm³ (0.302 lb/in³) | | **Melting Point** | 1380 - 1425 °C (2516 - 2597 °F) | | **Thermal Conductivity** | 13.0 W/m·K (at 20°C) | | **Electrical Resistivity** | 1.12 μΩ·m (at 20°C) | | **Modulus of Elasticity** | 214 GPa (31 x 10⁶ psi) | | **Coefficient of Thermal Expansion** | 13.5 μm/m·°C (20-100°C) | | **Magnetic Response** | Essentially non-magnetic | --- ### **Mechanical Properties (Typical for Annealed Condition)** The alloy provides good strength and excellent ductility in its standard condition. | Property | Value (Room Temperature, Annealed) | | :--- | :--- | | **Tensile Strength** | 690 - 830 MPa (100 - 120 ksi) | | **Yield Strength (0.2% Offset)** | 275 - 415 MPa (40 - 60 ksi) | | **Elongation** | 30% - 45% | | **Hardness (Rockwell B)** | 80 - 95 HRB | --- ### **Key Characteristics & Advantages** 1. **Excellent Oxidation Resistance:** The high chromium content provides outstanding resistance to scaling and oxidation in air at temperatures up to 950°C (1742°F). 2. **Good High-Temperature Strength:** Maintains useful mechanical strength and creep resistance at elevated temperatures. 3. **Superior Fabricability:** Can be readily cold-formed, hot-worked, and machined using standard techniques for nickel alloys. 4. **Excellent Weldability:** Can be welded by all conventional methods without post-weld heat treatment. 5. **Cost-Effective Performance:** Offers a favorable balance of properties and cost compared to more highly alloyed alternatives. --- ### **Product Applications** NIMONIC Alloy 75 is specified for various high-temperature components across multiple industries. * **Aerospace & Jet Engines:** * **Combustion chamber components** * **Exhaust system parts** * **Turbine seals and rings** * **Afterburner components** * **Industrial Heating:** * **Heat treatment furnace components** * **Radiant tubes and muffles** * **Annealing covers and baskets** * **Power Generation:** * **Gas turbine components** * **Heat exchanger parts** * **Chemical Processing:** * **Reactor components** * **High-temperature piping systems** ### **Summary** **NIMONIC Alloy 75 (UNS N06075)** is a versatile, solid-solution strengthened nickel-chromium alloy that provides reliable performance in high-temperature oxidizing environments. While being one of the earlier superalloys developed, it continues to serve effectively in applications requiring **good mechanical properties, excellent oxidation resistance, and superior fabricability** at temperatures up to 950°C. Governed by standards such as **BS HR 501** and **AMS 5754**, it represents a cost-effective solution for combustion systems, heat treatment equipment, and various high-temperature industrial components where reliability and performance are essential.

Packing of Standard Packing: Typical bulk packaging includes palletized plastic 5 gallon/25 kg. pails, fiber and steel drums to 1 ton super sacks in full container (FCL) or truck load (T/L) quantities. Research and sample quantities and hygroscopic, oxidizing or other air sensitive materials may be packaged under argon or vacuum. Solutions are packaged in polypropylene, plastic or glass jars up to palletized 3309 gallon liquid totes Special package is available on request.