Alloy 75,Haynes 75 Fittings,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) Fittings** **1. Introduction** Alloy 75 (commercially known as **Haynes 75** and standardized as **UNS N06075**) is a solid-solution strengthened nickel-chromium-tungsten alloy specifically engineered for extreme high-temperature service. In **fittings** form, this material provides reliable performance in high-temperature piping and tubing systems where exceptional oxidation resistance, mechanical strength, and thermal stability are required. Alloy 75 fittings maintain structural integrity and sealing capability at temperatures up to 1200°C (2200°F), making them ideal for critical high-temperature fluid and gas handling systems. **2. Chemical Composition (Weight %)** | Element | Content (%) | Role in the Alloy | |---------|-------------|-------------------| | Nickel (Ni) | Balance | Forms austenitic matrix, provides corrosion resistance and ductility | | Chromium (Cr) | 18.0-21.0 | Provides oxidation and sulfidation resistance through protective scale formation | | Tungsten (W) | 14.0-16.0 | Primary solid-solution strengthener for high-temperature strength | | 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 (0.323 lb/in³) | At 20°C | | Melting Point | ~1370°C (~2500°F) | - | | Thermal Expansion Coefficient | 12.1 μm/m·°C (6.7 μin/in·°F) | 20-1000°C | | Thermal Conductivity | 11.2 W/m·K | At 20°C | | Specific Heat | 431 J/kg·K (0.103 Btu/lb·°F) | At 20°C | | Modulus of Elasticity | 224 GPa (32.5 × 10⁶ psi) | 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 - Hardness: Rb 85 maximum **Elevated Temperature Performance:** - Excellent creep and stress-rupture strength at temperatures above 980°C (1800°F) - Maintains pressure boundary integrity under thermal cycling conditions - Good fatigue resistance for pulsating service **5. Key Characteristics & Advantages** - **Superior High-Temperature Strength**: Tungsten solid-solution strengthening provides exceptional pressure retention capabilities at elevated temperatures - **Outstanding Oxidation Resistance**: Forms protective, adherent chromium oxide scale that maintains sealing integrity in high-temperature service - **Excellent Dimensional Stability**: Maintains precise tolerances and sealing surfaces under thermal cycling conditions - **Superior Weldability**: Compatible with all standard welding methods including GTAW (TIG) and GMAW (MIG) - **Thermal Fatigue Resistance**: Withstands repeated thermal cycling without cracking or degradation - **Long-Term Reliability**: Resists microstructural changes that could compromise fitting integrity over time **6. Product Applications** Alloy 75 fittings are specified for critical high-temperature piping systems including: **Aerospace & Defense:** - Gas turbine engine fuel and oil systems - Afterburner fuel piping connections - High-temperature hydraulic systems - Bleed air ducting connections - Exhaust system instrumentation ports **Industrial Processing:** - High-temperature furnace piping systems - Heat treatment atmosphere gas lines - Radiant tube connections - Process gas conveyance systems - Thermal oxidizer piping networks **Power Generation:** - High-temperature steam and gas connections - Heat recovery system fittings - Combustion system instrumentation ports - Boiler and superheater connections **7. International Standards** Alloy 75 fittings conform to the following international standards: | Standard Organization | Standard Designation | Description | |----------------------|---------------------|-------------| | ASTM International | ASTM B366 | Factory-Made Wrought Fittings | | ASME | SB-366 | Factory-Made Wrought Fittings (pressure vessel code) | | ASME | B16.9 | Factory-Made Wrought Buttwelding Fittings | | ASME | B16.11 | Forged Fittings, Socket-Welding and Threaded | | MSS | SP-43 | Wrought Stainless Steel Buttwelding Fittings | | Unified Numbering System | UNS N06075 | - | **Available Fitting Types:** - **Buttweld Fittings**: Elbows (45°, 90°, 180°), Tees, Reducers, Caps - **Socket Weld Fittings**: Unions, Elbows, Tees, Couplings - **Threaded Fittings**: NPT, BSPT threads - **Flanges**: Slip-on, Weld Neck, Blind, Socket Weld - **Special Fittings**: Instrumentation ports, thermowell fittings **Pressure Ratings:** - Schedule 5S, 10S, 40S, 80S - Class 150, 300, 600, 900, 1500, 2500 - Custom pressure ratings available for specific applications **Manufacturing Standards:** - Manufactured from wrought material meeting ASTM B572 - Heat treated to optimize high-temperature performance - 100% visually inspected and dimensionally verified - Non-destructive testing available (PT, RT, UT) - Traceable heat numbers and material certifications **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. Always verify material certification and testing requirements for your specific application.

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 2061 gallon liquid totes Special package is available on request.