Alloy 75,Haynes 75 Tube,UNS N06075,E FORU

British Specs:BS HR5 Alloy 75 Bar BS HR203 Alloy 75 sheet BS HR403 Alloy 75 tube* BS HR504 Alloy 75 Bar (rivet)，American Specs:，German Specs:WS 2.4630 WS 2.4951,AFNOR NC 20T

**Technical Datasheet: Alloy 75 (Haynes 75 / UNS N06075) Tube** **1. Introduction** Alloy 75 (commercially known as **Haynes 75** and standardized as **UNS N06075**) is a solid-solution strengthened nickel-chromium-tungsten alloy specifically designed for extreme high-temperature service. In **tube** form, this alloy provides exceptional performance in applications demanding superior oxidation resistance, high-temperature strength, and structural stability. The alloy maintains its mechanical properties and surface stability at temperatures up to 1200°C (2200°F), making it an ideal choice for critical high-temperature applications across aerospace and industrial sectors. **2. Chemical Composition (Weight %)** | Element | Content (%) | Role in the Alloy | |---------|-------------|-------------------| | Nickel (Ni) | Balance | Base element providing austenitic matrix and corrosion resistance | | Chromium (Cr) | 18.0-21.0 | Provides oxidation and sulfidation resistance | | Tungsten (W) | 14.0-16.0 | Primary solid-solution strengthener | | Iron (Fe) | ≤3.0 | Residual element | | Cobalt (Co) | ≤2.0 | Residual element | | Manganese (Mn) | ≤1.0 | Aids in deoxidation during melting | | Silicon (Si) | ≤0.50 | Enhances oxidation resistance | | Carbon (C) | ≤0.10 | Contributes to strength | | Sulfur (S) | ≤0.015 | Impurity element | | Phosphorus (P) | ≤0.015 | Impurity element | **3. Physical Properties** | Property | Value | Condition | |----------|-------|-----------| | Density | 8.94 g/cm³ | At 20°C | | Melting Point | ~1370°C | - | | Thermal Expansion Coefficient | 12.1 μm/m·°C | 20-1000°C | | Thermal Conductivity | 11.2 W/m·K | At 20°C | | Specific Heat | 431 J/kg·K | At 20°C | | Modulus of Elasticity | 224 GPa | At 20°C | **4. Mechanical Properties (Typical for Annealed Condition)** **Room Temperature Properties:** - Tensile Strength: 760 MPa (110 ksi) minimum - Yield Strength (0.2% Offset): 345 MPa (50 ksi) minimum - Elongation: 40% minimum **Elevated Temperature Performance:** - Excellent creep and stress-rupture strength at temperatures above 980°C (1800°F) - Maintains structural integrity under thermal cycling conditions **5. Key Characteristics & Advantages** - **Exceptional High-Temperature Strength**: Solid-solution strengthening from tungsten provides outstanding mechanical properties at elevated temperatures - **Superior Oxidation Resistance**: Forms protective chromium oxide scale for long-term service in oxidizing environments - **Excellent Thermal Stability**: Maintains microstructural integrity during prolonged high-temperature exposure - **Good Fabricability**: Tubes can be readily bent, formed, and welded using standard techniques - **Outstanding Weldability**: Suitable for GTAW (TIG) and other welding methods without post-weld heat treatment **6. Product Applications** Alloy 75 tubes are specified for critical high-temperature applications including: **Aerospace & Defense:** - Gas turbine engine components - Combustion liners and chambers - Afterburner components - Exhaust systems - Heat exchanger tubing **Industrial Processing:** - Radiant tubes for heat treatment furnaces - Thermocouple protection sheaths - High-temperature heat exchanger tubes - Process gas conveyance systems - Pyroprocessing equipment **Power Generation:** - High-temperature boiler components - Heat recovery systems - Advanced combustion system tubing **7. International Standards** Alloy 75 tubing conforms to the following international standards: | Standard Organization | Standard Designation | Description | |----------------------|---------------------|-------------| | ASTM International | ASTM B622 | Seamless Pipe and Tube | | ASTM International | ASTM B619 | Welded Pipe | | ASTM International | ASTM B751 | Welded Tube | | ASME | SB-622 | Seamless Pipe and Tube | | Aerospace (SAE) | AMS 5718 | Bars, Forgings, and Rings (base material) | **Note**: Tubes are available in both seamless and welded forms, with seamless tubing typically specified for high-pressure applications and welded tubing for general high-temperature service. **Disclaimer**: This technical data is provided for informational purposes only. Properties may vary based on manufacturing process, heat treatment, and specific product form. For critical applications, consult the manufacturer's current technical data sheets and relevant industry standards.

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 2057 gallon liquid totes Special package is available on request.