Alloy 706，Inconel 706 Pipe，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) Pipe // UNS N09706** --- #### **Material Overview** Alloy 706 is a precipitation-hardenable nickel-iron-chromium alloy pipe designed for high-strength applications in corrosive and high-temperature environments up to 1300°F (704°C). The pipe form offers excellent mechanical properties, good creep resistance, and superior machinability compared to other nickel-based alloys, making it ideal for pressure-containing applications in demanding industries. --- #### **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 | | Specific Heat Capacity (21°C) | 440 J/kg·K | 0.105 Btu/lb·°F | --- #### **Mechanical Properties (Typical - Aged Condition)** | Property | Seamless Pipe | Welded Pipe | |----------|---------------|-------------| | Tensile Strength | 1240-1380 MPa | 1200-1350 MPa | | Yield Strength (0.2% Offset) | 1035-1170 MPa | 1000-1150 MPa | | Elongation | 12-20% | 10-18% | | Hardness (Brinell) | 331-375 HB | 321-363 HB | --- #### **International Specifications** **ASTM Standards:** - B517 - Welded Nickel-Iron-Chromium Alloy Pipe - B705 - Nickel-Alloy Welded Pipe (General Requirement) - B829 - Seamless and Welded Nickel-Alloy Pipe (General Requirement) **Pressure Vessel Codes:** - ASME SB-517 - Pressure Vessel Application - ASME Section VIII, Division 1 **International Equivalents:** - UNS: N09706 - EN: NiCr15Fe7NbTi - DIN: 2.4696 - JIS: NCF 706 --- #### **Product Specifications** **Pipe Types:** - **Seamless Pipe**: Hot finished or cold drawn - **Welded Pipe**: Electric fusion welded, solution annealed - **Heat Exchanger Tubes**: Condenser and heat exchanger applications **Size Range:** - **Nominal Pipe Size**: 1/8" to 24" NPS - **Schedule**: 5S, 10S, 40S, 80S, 160, XXS - **Wall Thickness**: 0.5 mm to 50 mm (0.028" to 2.0") - **Length**: Random (16-22 feet) or cut length **Pressure Ratings:** - **Class 150 to 2500** - **Schedule 5S to XXS** - Custom pressure ratings available --- #### **Heat Treatment** **Solution Annealing:** - 1700-1800°F (925-980°C) for 1 hour, rapid cooling **Precipitation Aging:** - 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** - **High Pressure Capability**: Excellent strength for high-pressure piping systems - **Superior Machinability**: Better machinability than most nickel-based alloys - **Good Weldability**: Can be welded using common processes with proper procedure - **Thermal Fatigue Resistance**: Excellent resistance to thermal cycling - **Creep Strength**: Good creep rupture strength at elevated temperatures - **Corrosion Resistance**: Moderate corrosion resistance in various environments --- #### **Typical Applications** **Oil & Gas Industry:** - High-pressure flow lines - Wellhead piping systems - Chemical injection lines - Process piping in sour service - Downhole tool housings **Power Generation:** - Steam turbine bypass systems - High-pressure steam lines - Boiler feedwater systems - Gas turbine fuel lines - Heat recovery system piping **Aerospace & Defense:** - Hydraulic system tubing - Fuel system piping - Engine test stand piping - High-pressure air systems **Chemical Processing:** - High-pressure reactor feed lines - Process gas piping - Catalyst injection systems - High-temperature transfer lines **Industrial Applications:** - High-pressure hydraulic systems - Process instrumentation lines - Compressor discharge piping - High-temperature utility piping --- #### **Fabrication & Installation** **Welding Procedures:** - **Process**: GTAW (TIG), GMAW (MIG), SMAW - **Filler Metal**: AWS A5.14 ERNiFeCr-2 - **Preheat**: 400-600°F (204-316°C) - **Post-Weld Heat Treatment**: Recommended for optimum properties **Bending & Forming:** - **Cold Bending**: Minimum bend radius 3x OD - **Hot Bending**: 1600-1800°F (871-982°C) - **Flaring**: Standard flaring procedures applicable **Cutting & Grooving:** - Abrasive cutting recommended - Mechanical cutting with proper tooling - Grooving for mechanical couplings --- #### **Quality Assurance & Testing** **Non-Destructive Testing:** - Hydrostatic testing per ASTM standards - Ultrasonic testing for seamless pipe - Radiographic examination for welded pipe - Eddy current testing for tubes **Certification & Documentation:** - Mill Test Certificate 3.1 per EN 10204 - Chemical Analysis Report - Mechanical Test Reports - NDE Reports as specified - Heat Treatment Certificates **Standards Compliance:** - NACE MR0175/ISO 15156 (Sour Service) - PED 2014/68/EU (Pressure Equipment) - API 6A/17D (Oilfield Applications) --- **Note:** *Inconel® is a registered trademark of Special Metals Corporation. All values are typical and may vary based on manufacturing process, heat treatment, and pipe dimensions. Consult engineering specifications for critical applications.*

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 1770 gallon liquid totes Special package is available on request.