Alloy 75,Haynes 75 Bar(Round bar, Flat bar),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) Bar** #### **Round Bar & Flat Bar** --- #### **1. Introduction** **Alloy 75** (commercially known as **Haynes 75** and standardized as **UNS N06075**) is a nickel-chromium-tungsten alloy designed for exceptional high-temperature service. It is strengthened by a solid-solution mechanism, primarily through its tungsten content, which provides outstanding strength and structural stability at temperatures up to 1200°C (2200°F). This alloy is renowned for its excellent resistance to oxidation, good fabricability, and superior long-term microstructural stability. Supplied in the form of **round bar** and **flat bar**, Alloy 75 is a preferred material for machining, forging, and fabricating critical components in the aerospace and industrial heating sectors. --- #### **2. Chemical Composition (Weight %)** The composition conforms to the standard requirements for UNS N06075. | Element | Content (%) | Role in the Alloy | | :--- | :--- | :--- | | **Nickel (Ni)** | Balance | Base element providing austenitic matrix, corrosion resistance, and toughness. | | **Chromium (Cr)** | 18.0 - 21.0 | Imparts superior oxidation and sulfidation resistance. | | **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; controlled for fabricability. | | **Sulfur (S)** | ≤ 0.015 | Impurity, kept low. | | **Phosphorus (P)** | ≤ 0.015 | Impurity, kept low. | --- #### **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 hot-finished and annealed round and flat bars. Actual values may vary with section size. **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:** * Exhibits excellent stress-rupture and creep strength at temperatures above 980°C (1800°F). --- #### **5. Key Characteristics & Advantages** * **High-Temperature Strength:** Maintains mechanical integrity under extreme thermal and mechanical stress, thanks to solid-solution strengthening from tungsten. * **Outstanding Oxidation Resistance:** Forms a stable, adherent chromia-based scale, providing long-lasting protection in cyclic high-temperature environments. * **Excellent Structural Stability:** Resists the formation of detrimental secondary phases during prolonged exposure to high temperatures. * **Good Machinability and Fabricability:** Round and flat bars are suitable for machining, welding, and forming using standard techniques for nickel-based alloys. --- #### **6. Product Applications** Alloy 75 round and flat bars are primarily used for manufacturing high-temperature components through machining and fabrication. **Round Bar Applications:** * **Gas Turbine Engine Components:** Turbine stator vanes, combustor swirlers, support rods, and fasteners. * **Industrial Furnace Components:** Radiant tubes, roller hearth rolls, thermocouple sheaths, and support pins. * **Fixture and Tooling:** Heat treating fixtures, baskets, and trays. **Flat Bar Applications:** * **Structural Supports:** Brackets, rails, and supports within high-temperature furnaces and exhaust systems. * **Fabricated Assemblies:** Custom-built furnace internals and combustion chamber parts. * **Wear Components:** Guides and slides for high-temperature processing equipment. --- #### **7. International Standards** Alloy 75 (UNS N06075) bar products are covered by the following key international standards: | Standard Organization | Standard Designation | Title / Description | | :--- | :--- | :--- | | **ASTM International** | **ASTM B572** | Standard Specification for Rod and Bar UNS N06075 | | **Aerospace (SAE)** | **AMS 5718** | Bars, Forgings, and Rings, 78Ni - 19Cr - 1.5Co - 1.0Mn - 0.50Si (Alloy 75) | | **Unified Numbering System** | **UNS N06075** | - | **Note:** For procurement, it is essential to specify the required form (Round Bar or Flat Bar), dimensions, and the applicable standard (e.g., ASTM B572 or AMS 5718) to ensure material compliance. --- **Disclaimer:** This data sheet is for informational purposes only. Properties can vary based on manufacturing process, heat treatment, and specific lot chemistry. For critical applications, always consult the manufacturer's official technical data sheets 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 2055 gallon liquid totes Special package is available on request.