Alloy 907,Incoloy 907 Wire,UNS N19907,E FORU

British Specs:，American Specs:，German Specs:

### Technical Datasheet: Alloy 907 / Incoloy 907 Wire / UNS N19907 --- #### 1. Overview **Alloy 907** (commercially known as **Incoloy® 907**) is a nickel-iron-cobalt-niobium precipitation-hardening superalloy specifically engineered for high-temperature applications requiring low thermal expansion characteristics and exceptional mechanical strength. This datasheet focuses on the **Wire** product form, which is manufactured through precision drawing processes to achieve specific diameters and enhanced mechanical properties. Incoloy 907 Wire combines excellent high-temperature performance with good formability, making it suitable for fasteners, springs, welding consumables, and other critical components operating at temperatures up to 550°C (1020°F). The wire form offers consistent quality and uniform properties throughout its length, ensuring reliable performance in demanding applications where thermal expansion matching is crucial. --- #### 2. Key Characteristics * **Low Thermal Expansion:** Controlled expansion characteristics matching engine components * **High Temperature Strength:** Excellent mechanical properties at elevated temperatures * **Outstanding Creep Resistance:** Superior long-term creep rupture strength under sustained loading * **Good Fatigue Resistance:** Excellent resistance to mechanical fatigue * **Age-Hardenable:** Achieves high strength through precipitation hardening heat treatment * **Excellent Formability:** Can be cold formed and shaped in annealed condition * **Good Spring Properties:** Suitable for spring applications in high-temperature environments * **Consistent Quality:** Uniform properties throughout wire length * **Precision Dimensional Control:** Tight diameter tolerances and excellent surface finish --- #### 3. Chemical Composition (Weight %) | Element | Minimum (%) | Maximum (%) | Key Function | | :--- | :--- | :--- | :--- | | **Nickel (Ni)** | 35.0 | 40.0 | Matrix element providing austenitic structure | | **Iron (Fe)** | Balance | - | Base element for cost-effective strengthening | | **Cobalt (Co)** | 12.0 | 16.0 | Enhances high-temperature strength and stability | | **Niobium (Nb)** | 4.3 | 5.2 | Primary precipitation hardening element | | **Titanium (Ti)** | 1.3 | 1.8 | Secondary precipitation hardener | | **Silicon (Si)** | 0.05 | 0.25 | Improves oxidation resistance | | **Aluminum (Al)** | 0.05 | 0.25 | Enhances oxidation resistance | | **Carbon (C)** | 0.01 | 0.05 | Controlled for carbide formation | | **Manganese (Mn)** | - | 0.50 | - | | **Sulfur (S)** | - | 0.015 | - | | **Boron (B)** | 0.003 | 0.012 | Enhances creep strength | --- #### 4. Physical Properties (Typical) | Property | Metric Value | Imperial Value | | :--- | :--- | :--- | | **Density** | 8.25 g/cm³ | 0.298 lb/in³ | | **Melting Range** | 1360-1410°C | 2480-2570°F | | **Specific Heat (20°C)** | 450 J/kg·K | 0.107 BTU/lb·°F | | **Thermal Conductivity** | 13.5 W/m·K | 78.0 BTU·in/hr·ft²·°F | | **Mean Coefficient of Thermal Expansion (20-400°C)** | 11.5 μm/m·K | 6.4 μin/in·°F | | **Electrical Resistivity** | 1.10 μΩ·m | 662 ohm·circ mil/ft | | **Modulus of Elasticity** | 205 GPa | 29.7×10⁶ psi | --- #### 5. Mechanical Properties (Typical) | Condition | Tensile Strength (MPa) | Yield Strength (MPa) | Elongation (%) | Hardness (HV) | | :--- | :--- | :--- | :--- | :--- | | **Annealed** | 700-850 | 550-700 | 20-30 | 250-320 | | **Hard Drawn** | 950-1150 | 850-1050 | 8-15 | 320-400 | | **Spring Temper** | 1150-1350 | 1050-1250 | 5-10 | 380-450 | | **Aged Condition** | 1280-1420 | 1000-1150 | 10-18 | 370-420 | --- #### 6. International Standards & Specifications **Wire Product Standards:** * **AMS 5917:** Nickel Alloy, Corrosion and Heat Resistant, Bars, Forgings, and Rings * **ASTM B637:** Precipitation-Hardening Nickel Alloy Bars, Forgings, and Forging Stock * **ASTM B670:** Standard Specification for Precipitation-Hardening Nickel Alloy Plate, Sheet, and Strip **Welding Wire Standards:** * **AWS A5.14:** ERNiFeCr-2 * **ISO 18274:** S Ni 8065 **International Equivalents:** * **UNS:** N19907 * **EN:** NiCr15Fe7NbTi * **DIN:** 2.4665 * **GB:** GH2907 (Chinese equivalent) --- #### 7. Product Specifications & Availability **Wire Specifications:** * **Diameter Range:** 0.5 mm to 10.0 mm (0.020" to 0.400") * **Tolerance:** ±0.02 mm for diameters up to 2.0 mm, ±0.03 mm for larger diameters * **Surface Finish:** Bright, cleaned, or special coatings * **Packaging:** Spools, coils, or straight lengths **Available Conditions:** * **Annealed:** Soft condition for forming and machining * **Hard Drawn:** Increased strength for fasteners * **Spring Temper:** Maximum strength for spring applications * **Solution Treated & Aged:** Fully heat treated condition **Special Wire Types:** * **Welding Wire:** ERNiFeCr-2 classification * **Spring Wire:** High tensile strength with good fatigue resistance * **Fastener Wire:** Cold heading quality * **Electrical Resistance Wire:** For heating elements --- #### 8. Applications **Aerospace Industry:** * Gas turbine engine fasteners * High-temperature spring components * Engine control system components * Aircraft structural fasteners * Rocket engine components **Power Generation:** * Gas turbine component fasteners * High-temperature spring washers * Turbine blade retention wires * Boiler and heat exchanger components * Nuclear power plant fasteners **Industrial Applications:** * High-temperature bolts and studs * Spring components for elevated temperature service * Heat treatment fixture components * Nuclear reactor components * Chemical processing equipment **Fastener Industry:** * High-temperature bolts and nuts * Specialized screws and studs * Marine and chemical processing fasteners * Critical service fasteners **Other Applications:** * Welding consumables for similar alloys * Wire mesh for high-temperature filtration * Electrical resistance heating elements * Instrumentation and sensor components * Medical device components --- #### 9. Processing & Fabrication **Wire Drawing:** * Multiple pass drawing with intermediate annealing * Controlled reduction per pass * Use of appropriate lubricants and die materials * Regular annealing to maintain workability * Precision diameter control throughout process **Forming Operations:** * **Cold Heading:** Suitable for fastener manufacturing * **Spring Coiling:** Various coil configurations possible * **Wire Weaving:** For mesh and filter applications * **Bending and Forming:** Good formability in annealed condition * **Wire EDM:** Suitable for precision components **Heat Treatment:** * **Solution Treatment:** 980-1010°C (1800-1850°F), rapid cooling * **Aging Treatment:** * Primary: 720-745°C (1330-1375°F) for 8 hours, air cool * Secondary: 620-650°C (1150-1200°F) for 8 hours, air cool * **Stress Relieving:** 600-630°C (1110-1170°F) for 1-2 hours **Welding Characteristics:** * **Weldability:** Good with proper procedures * **Recommended Process:** GTAW with pulsed current * **Filler Metal:** AWS A5.14 ERNiFeCr-2 * **Pre/Post Weld Heat Treatment:** Required --- #### 10. Quality Assurance & Testing **Dimensional Control:** * Diameter verification at multiple points * Ovality and surface quality inspection * Length measurement and coil integrity * Surface defect detection **Mechanical Testing:** * Tensile testing per ASTM E8 * Hardness surveys * Wrap tests for ductility assessment * Torsion tests for specific applications * Fatigue testing for spring applications **Non-Destructive Testing:** * Eddy Current Testing for surface defects * Visual inspection per applicable standards * Ultrasonic testing for larger diameters **Certification & Documentation:** * Full traceability with material certifications * Heat treatment records * Test reports and certificates of conformity * Mill Test Reports (MTR) with complete chemical analysis * Dimensional inspection reports --- **Disclaimer:** This technical information is for reference purposes. For critical applications in aerospace, nuclear, or high-temperature services, always consult the specific material certification and the latest version of applicable standards. Actual properties may vary depending on manufacturing processes, heat treatment, and specific wire dimensions.

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 1987 gallon liquid totes Special package is available on request.