Alloy 706，Inconel 706 Wire，UNS N09706，EFORU

British Specs:，American Specs:AMS 5701 Bar and Forgings AMS 5702 Bar and Forgings AMS 5703 Bar and Forgings AMS 5605 Sheet, Strip and Plate AMS 5606 Sheet, Strip and Plate，German Specs:

### **Product Introduction: Alloy 706 / Inconel 706 Wire (UNS N09706)** #### **Overview** **Alloy 706** (commercially known as **Inconel® 706**) wire is a premium nickel-iron-chromium superalloy supplied in wire form, valued for its unique combination of high strength, excellent fabricability, and outstanding performance at elevated temperatures. This precipitation-hardenable alloy is particularly noted for its superior machinability and lower thermal expansion coefficient compared to similar alloys like Alloy 718. Inconel 706 wire serves critical roles across industries, functioning both as a consumable welding product and as a raw material for manufacturing high-performance components. --- #### **Chemical Composition** The chemical composition of Alloy 706 wire (UNS N09706) conforms to strict standards ensuring consistent performance: | Element | Content (%) | | :--- | :--- | | **Nickel (Ni)** | 39.0 - 44.0 | | **Chromium (Cr)** | 14.5 - 17.5 | | **Iron (Fe)** | Balance | | **Niobium (Nb)** | 2.5 - 3.3 | | **Titanium (Ti)** | 1.5 - 2.0 | | **Molybdenum (Mo)** | ≤ 0.30 | | **Aluminum (Al)** | 0.20 - 0.40 | | **Carbon (C)** | ≤ 0.08 | | **Manganese (Mn)** | ≤ 0.35 | | **Silicon (Si)** | ≤ 0.35 | | **Sulfur (S)** | ≤ 0.015 | | **Copper (Cu)** | ≤ 0.30 | | **Boron (B)** | 0.003 - 0.01 | *The optimized composition enables precipitation hardening through gamma prime [γ' Ni₃(Al, Ti)] and gamma double prime [γ'' Ni₃Nb] phase formation.* --- #### **Physical Properties** The physical properties make Alloy 706 wire suitable for demanding thermal and electrical applications: | Property | Metric Value | Imperial Value | | :--- | :--- | :--- | | **Density** | 8.05 g/cm³ | 0.291 lb/in³ | | **Melting Range** | 1370 - 1430 °C | 2500 - 2600 °F | | **Specific Heat (20°C)** | 450 J/kg·K | 0.108 Btu/lb·°F | | **Thermal Conductivity (20°C)** | 12.5 W/m·K | 86.7 Btu·in/hr·ft²·°F | | **Thermal Expansion Coefficient (20-100°C)** | 12.8 μm/m·°C | 7.1 μin/in·°F | | **Modulus of Elasticity** | 204 GPa | 29.5 x 10⁶ psi | | **Electrical Resistivity** | 1.18 μΩ·m | - | --- #### **Mechanical Properties** Mechanical properties vary based on temper and heat treatment condition: **Solution Annealed Condition (Typical):** * **Tensile Strength:** 950-1100 MPa (138-160 ksi) * **Yield Strength (0.2% Offset):** 550-750 MPa (80-109 ksi) * **Elongation:** ≥ 20% **Aged Condition (After Solution Annealing + Aging):** * **Tensile Strength:** ≥ 1240 MPa (180 ksi) * **Yield Strength (0.2% Offset):** ≥ 1030 MPa (150 ksi) * **Elongation:** ≥ 12% --- #### **International Standards** Alloy 706 wire is manufactured according to several international specifications: * **ASTM B805:** Standard Specification for Precipitation Hardening Nickel Alloy Bars, Forgings, and Forging Stock (covers wire for remelting/forging) * **AMS 7857:** Bars, Forgings, and Rings (often referenced for wire products) * **AWS A5.14/A5.14M:** Specification for Nickel and Nickel-Alloy Bare Welding Electrodes and Rods (for welding wire) * **DIN 17752:** Wrought Nickel and Nickel Alloys - Technical Delivery Conditions * **Customer Specifications:** Often supplied to detailed customer requirements for specific applications --- #### **Product Applications** Alloy 706 wire serves multiple critical functions across various industries: **As Welding Consumable:** * **Gas Tungsten Arc Welding (GTAW/TIG):** Bare wire for joining Alloy 706 components * **Gas Metal Arc Welding (GMAW/MIG):** Wire for automated welding processes * **Repair and Maintenance:** Welding repair of turbine components and other high-temperature parts **As Fabricated Components:** * **Fasteners:** Manufacturing of high-strength bolts, studs, and screws for elevated temperature service * **Springs:** Wire for high-temperature springs used in valves, actuators, and safety systems * **Wire Mesh:** High-temperature filters and screens for industrial processes * **Electrical Components:** Heating element supports and high-temperature electrical connectors --- #### **Key Advantages** * **Excellent Weldability:** Produces sound, crack-resistant welds with matching composition and properties * **Superior Machinability:** Significantly better machinability than Alloy 718 in solution-annealed condition * **Controlled Thermal Expansion:** Low coefficient of thermal expansion ensures dimensional stability in thermal cycling environments * **High Strength Retention:** Maintains mechanical properties at temperatures up to 700°C (1300°F) * **Good Oxidation Resistance:** Resists scaling and degradation in high-temperature service environments * **Versatile Processing:** Available in various surface conditions and packages (spools, coils, straight lengths) to suit different manufacturing needs **Note:** *Inconel® is a registered trademark of Special Metals Corporation, a PCC company. The wire is typically supplied in solution-annealed condition for optimum formability, with subsequent age hardening to develop full mechanical properties. Proper storage and handling are essential to prevent surface contamination.* --- **Typical Wire Forms Available:** - Spooled wire (0.5mm to 2.5mm diameter) - Straight lengths (1.0mm to 6.0mm diameter) - Custom packaging and surface finishes

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 1779 gallon liquid totes Special package is available on request.