Alloy 75,Haynes 75 Pipe,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) Pipe** #### **1. Introduction** **Alloy 75** (known commercially as **Haynes 75** and designated **UNS N06075**) is a solid-solution strengthened nickel-chromium-tungsten alloy renowned for its exceptional high-temperature strength and outstanding oxidation resistance. In the form of **pipe**, this alloy is engineered to withstand extreme thermal environments, corrosive atmospheres, and high mechanical stress, making it ideal for critical high-temperature conveyance systems. The combination of excellent fabricability, weldability, and long-term microstructural stability allows Alloy 75 pipe to perform reliably in demanding applications such as aerospace propulsion systems and industrial thermal processing. --- #### **2. Chemical Composition (Weight %)** The composition conforms to the standard requirements for UNS N06075 pipe. | Element | Content (%) | Role in the Alloy | | :--- | :--- | :--- | | **Nickel (Ni)** | Balance | Forms the austenitic matrix, providing fundamental corrosion resistance and ductility. | | **Chromium (Cr)** | 18.0 - 21.0 | Confers exceptional resistance to oxidation and sulfidation by forming a protective Cr₂O₃ scale. | | **Tungsten (W)** | 14.0 - 16.0 | Primary solid-solution strengthener, providing high-temperature strength and creep resistance. | | **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 grain boundary strength. | | **Sulfur (S)** | ≤ 0.015 | Impurity, kept very low to prevent hot shortness. | | **Phosphorus (P)** | ≤ 0.015 | Impurity, kept very low to maintain weldability and ductility. | --- #### **3. Physical Properties** | Property | Value | Condition | | :--- | :--- | :--- | | **Density** | 8.94 g/cm³ | (0.323 lb/in³) | | **Melting Point** | ~ 1370°C | (~ 2500°F) | | **Thermal Expansion Coefficient** | 12.1 μm/m·°C | 20-1000°C (6.7 μin/in·°F) | | **Thermal Conductivity** | 11.2 W/m·K | @ 20°C | | **Specific Heat** | 431 J/kg·K | @ 20°C | | **Modulus of Elasticity** | 224 GPa | (32.5 x 10⁶ psi) @ 20°C | --- #### **4. Mechanical Properties (Typical for Annealed Condition)** Properties are typical for annealed pipe. **Room Temperature Properties:** * **Tensile Strength:** 760 MPa (110 ksi) min * **Yield Strength (0.2% Offset):** 345 MPa (50 ksi) min * **Elongation:** 40% min **Elevated Temperature Performance:** * Maintains excellent load-bearing capacity and resistance to creep and stress-rupture at temperatures exceeding 980°C (1800°F). --- #### **5. Key Characteristics & Advantages** * **Superior High-Temperature Strength:** The high tungsten content provides remarkable strength and resistance to deformation under load at temperatures up to 1200°C (2200°F). * **Exceptional Oxidation Resistance:** Forms a stable, self-healing chromium oxide scale that protects the base metal from aggressive oxidizing environments. * **Excellent Weldability:** Pipes can be readily welded using Gas Tungsten Arc Welding (GTAW/TIG) without post-weld heat treatment for most applications, facilitating the fabrication of complex systems. * **Long-Term Stability:** Resists the formation of embrittling phases, ensuring toughness and reliability over extended service life. * **Good Formability:** Can be bent and fabricated to required configurations using standard techniques for high-temperature alloys. --- #### **6. Product Applications** Alloy 75 pipe is specified for high-temperature, high-stress systems where reliability is paramount. * **Aerospace & Gas Turbine Engines:** * **Exhaust Manifolds and Ducting** * **Combustor Liners and Casing** * **Afterburner Fuel Lines and Compartments** * **Hot Air / Bleed Air Ducting Systems** * **Industrial Furnace & Heat Treatment:** * **Radiant Tubes** for atmosphere and heat-treating furnaces. * **Thermocouple Protection Sheaths.** * **High-Temperature Process Piping** for carrying hot gases or combustion products. * **Heat Recovery Systems.** * **Power Generation:** * **High-temperature piping** in advanced combustion systems. --- #### **7. International Standards** Alloy 75 (UNS N06075) pipe is covered by the following key international standards. | Standard Organization | Standard Designation | Title / Description | | :--- | :--- | :--- | | **ASTM International** | **ASTM B619** | Standard Specification for Welded Pipe (UNS N06075) | | **ASTM International** | **ASTM B622** | Standard Specification for Seamless Pipe and Tube (UNS N06075) | | **ASTM International** | **ASTM B775/B776** | Standard Specification for General Requirements for Nickel Alloy Pipe (Dimensional, etc.) | | **Aerospace (SAE)** | **AMS 5718** | Bars, Forgings, and Rings (Often referenced for base material qualification) | | **Unified Numbering System** | **UNS N06075** | - | **Note:** For procurement, it is critical to specify the manufacturing method (seamless or welded), dimensions (OD, WT, schedule), and the complete ASTM standard (e.g., ASTM B622 for seamless pipe) to ensure the material meets the specific application requirements. --- **Disclaimer:** The information provided is for reference purposes. Material properties can vary based on manufacturing process, heat treatment, and lot-specific chemistry. For critical applications, always consult the official datasheets from the material producer and the final project specifications.

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 2056 gallon liquid totes Special package is available on request.