Alloy 706，Inconel 706 Bar(Round bar, Flat bar)，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 Datasheet: Alloy 706 (Inconel® 706) Bar // UNS N09706** #### **Round Bar & Flat Bar** --- #### **Material Overview** Alloy 706 is a precipitation-hardenable nickel-iron-chromium alloy supplied in bar form, offering an exceptional combination of high strength, excellent machinability, and good creep resistance up to 1300°F (704°C). Available as both round bars and flat bars, this product form provides versatility for machining, fabrication, and structural applications where reliability at elevated temperatures is critical. --- #### **Chemical Composition (Weight %)** | Element | Minimum | Maximum | Element | Minimum | Maximum | |---------|---------|---------|---------|---------|---------| | Ni | 39.0 | 44.0 | Fe | 35.0 | 40.0 | | Cr | 14.5 | 17.5 | Nb | 2.5 | 3.3 | | Mo | - | 1.0 | Ti | 1.5 | 2.0 | | Al | 0.1 | 0.4 | C | - | 0.08 | | Mn | - | 0.50 | Si | - | 0.50 | | P | - | 0.03 | S | - | 0.02 | | Cu | - | 0.50 | B | - | 0.02 | --- #### **Physical Properties** | Property | Value (Metric) | Value (Imperial) | |----------|----------------|------------------| | Density | 8.05 g/cm³ | 0.291 lb/in³ | | Melting Range | 1365-1425°C | 2490-2600°F | | Thermal Conductivity (21°C) | 11.2 W/m·K | 7.8 Btu·in/hr·ft²·°F | | Mean Coefficient of Thermal Expansion (21-538°C) | 14.2 μm/m·K | 7.9 x 10⁻⁶ in/in/°F | | Modulus of Elasticity | 206 GPa | 29.9 x 10⁶ psi | | Electrical Resistivity | 1.12 μΩ·m | 44.1 μΩ·in | --- #### **Mechanical Properties (Typical - Aged Condition)** | Product Form | Tensile Strength (MPa) | Yield Strength (MPa) | Elongation (%) | Impact Strength (J) | |--------------|------------------------|----------------------|----------------|---------------------| | Round Bar | 1240-1380 | 1035-1170 | 12-20 | 20-40 | | Flat Bar | 1200-1350 | 1000-1150 | 12-18 | 18-35 | --- #### **International Specifications** **ASTM Standards:** - B637 - Precipitation-Hardening Nickel Alloy Bars, Forgings, and Forging Stock **Aerospace Standards:** - AMS 5703 - Bars, Forgings, and Rings - AMS 5704 - Forging Stock **International Equivalents:** - UNS: N09706 - EN: NiCr15Fe7NbTi - DIN: 2.4696 - GB: GH706 --- #### **Product Specifications** **Round Bar:** - **Diameter Range**: 5 mm to 500 mm (0.1875" to 20") - **Length**: 3-6 meters (10-20 feet), cut-to-length available - **Tolerance**: h11 standard, special tolerances available - **Surface**: Hot finished, cold drawn, turned, ground, or polished **Flat Bar:** - **Thickness**: 5 mm to 150 mm (0.1875" to 6") - **Width**: 20 mm to 400 mm (0.75" to 16") - **Length**: 3-6 meters (10-20 feet), cut-to-length available - **Edge Condition**: As-rolled, milled, or precision ground edges --- #### **Heat Treatment** **Solution Treatment:** - 1700-1800°F (925-980°C) for 1 hour, rapid cooling **Aging Treatment (Standard):** - 1325°F (720°C) for 8 hours, furnace cool to 1150°F (620°C) - Hold at 1150°F (620°C) for 8 hours, air cool --- #### **Key Characteristics** - **Superior Machinability**: Excellent machining characteristics for a precipitation-hardening superalloy - **High Strength-to-Weight Ratio**: Outstanding mechanical properties in both round and flat configurations - **Excellent Thermal Stability**: Maintains dimensional stability during thermal cycling - **Good Weldability**: Can be welded using common processes with proper procedures - **Uniform Properties**: Consistent mechanical properties throughout cross-sections - **Crack Resistance**: Good resistance to strain-age cracking during heat treatment --- #### **Typical Applications** **Aerospace & Defense:** - Gas turbine engine mounting brackets (flat bar) - Compressor disk blanks (round bar) - Engine shafting components (round bar) - Structural support elements (flat bar) - Afterburner ring segments **Power Generation:** - Turbine rotor components (round bar) - Generator retaining rings - High-temperature fasteners - Heat exchanger support structures (flat bar) - Steam turbine blades **Oil & Gas:** - Downhole tool bodies (round bar) - Wellhead component blanks - Valve bodies and stems - Drill string stabilizer bars - Subsea equipment structural members **Industrial Equipment:** - High-strength drive shafts (round bar) - Pump and compressor components - Machine tool structural elements (flat bar) - High-temperature fixture plates - Processing equipment rails and guides --- #### **Machining & Fabrication** **Recommended Tools:** - Carbide inserts with positive rake angles - C-2 or C-3 grade carbides for roughing - C-5 or C-6 grade carbides for finishing **Cutting Parameters:** - **Turning**: 20-35 m/min (65-115 ft/min) - **Milling**: 25-40 m/min (80-130 ft/min) - **Drilling**: 10-15 m/min (30-50 ft/min) **Welding Considerations:** - Use matching composition filler metal - Pre-heat to 400-600°F (204-316°C) - Post-weld heat treatment recommended - Suitable for TIG, MIG, and resistance welding --- #### **Quality Assurance** - Chemical composition certification - Mechanical property testing - Ultrasonic testing available - Dimensional verification - Surface quality inspection - Full material traceability **Certification:** - Mill Test Certificate EN 10204 3.1 - Material Test Report per ASTM requirements - NACE MR0175/ISO 15156 compliance available *Note: Inconel® is a registered trademark of Special Metals Corporation. Properties may vary depending on section size, heat treatment, and processing conditions. Consult technical datasheets for specific application requirements.*

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 1769 gallon liquid totes Special package is available on request.