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

British Specs:，American Specs:，German Specs:

### **Technical Datasheet: Alloy 907 / Incoloy 907 Rod / UNS N19907** --- #### **1. Overview** **Alloy 907** (commercially known as **Incoloy® 907**) is a nickel-iron-cobalt-niobium precipitation-hardening superalloy specifically designed for applications requiring low thermal expansion and high strength at elevated temperatures. This datasheet focuses on the **Rod** product form, which serves as essential stock material for machining high-temperature components where close clearance control and dimensional stability are critical. Incoloy 907 Rod maintains excellent mechanical properties and controlled thermal expansion characteristics at temperatures up to 550°C (1020°F), making it particularly suitable for gas turbine engine components, fasteners, and structural elements. --- #### **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 creep rupture strength under sustained loading * **Good Thermal Fatigue Resistance:** Excellent resistance to thermal cycling * **Age-Hardenable:** Achieves optimal strength through precipitation hardening * **Good Machinability:** Can be precision machined in solution-treated condition * **Dimensional Stability:** Maintains precise dimensions under thermal cycling --- #### **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 for Aged Condition - Rod)** * **Tensile Strength:** 1310-1450 MPa (190-210 ksi) * **Yield Strength (0.2% Offset):** 1030-1170 MPa (150-170 ksi) * **Elongation:** 8-15% * **Reduction of Area:** 12-20% * **Hardness:** HB 380-430 * **Impact Strength:** 25-40 J (18-30 ft-lb) * **Creep Rupture Strength (540°C/1000°F):** 580 MPa (84 ksi) for 1000 hours --- #### **6. International Standards & Specifications** **Rod 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 **Aerospace Standards:** * **GE S400:** Gas Turbine Engine Specifications * **Pratt & Whitney:** Material Specifications * **Rolls-Royce:** RPS 500 Series **International Equivalents:** * **UNS:** N19907 * **EN:** NiCr15Fe7NbTi * **DIN:** 2.4665 * **ISO:** 6207 (Nickel alloy bars) --- #### **7. Product Specifications & Availability** **Rod Specifications:** * **Diameter Range:** 5 mm to 250 mm (0.2" to 10") * **Length:** Standard 3-6 meters (10-20 feet), custom lengths available * **Tolerance:** h9, h11, or per customer requirements * **Straightness:** Typically 1 mm per meter maximum **Available Conditions:** * **Solution Treated:** Optimal for machining (980-1010°C) * **Solution Treated & Aged:** Ready for service * **Hot Finished:** As-forged condition * **Turned/Ground:** Precision finished surfaces **Surface Finish:** * **Black Surface:** Hot worked finish * **Turned:** Machine turned surface * **Ground:** Precision ground finish * **Polished:** Special surface requirements --- #### **8. Applications** **Aerospace Industry:** * Gas turbine engine shafts and spindles * Turbine disk mounting bolts * Compressor rotor components * Engine mounting components * Aircraft structural fasteners **Power Generation:** * Gas turbine rotor components * Steam turbine bolts and studs * High-temperature fasteners * Turbine wheel shafts * Generator components **Industrial Applications:** * High-temperature bolts and studs * Nuclear reactor components * Chemical processing equipment shafts * Heat treatment fixture components * Precision instrument components **Specific Component Applications:** * **Shafts:** Rotating components in high-temperature environments * **Fasteners:** Bolts, studs, and specialized fasteners * **Valve Components:** Stems, plugs, and trim parts * **Structural Components:** High-temperature supports and brackets --- #### **9. Processing & Fabrication** **Machining Guidelines:** * **Condition:** Machine in solution-treated condition * **Tool Material:** Premium carbide tools recommended * **Cutting Speed:** 8-15 m/min (25-50 SFM) * **Feed Rate:** 0.1-0.2 mm/rev (0.004-0.008 IPR) * **Depth of Cut:** 1-3 mm (0.040-0.120 inches) * **Coolant:** High-pressure coolant essential **Heat Treatment:** * **Solution Treatment:** 980-1010°C (1800-1850°F), rapid cool * **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 2-4 hours **Welding Considerations:** * **Weldability:** Good with proper procedures * **Recommended Process:** GTAW (TIG) preferred * **Filler Metal:** AWS A5.14 ERNiFeCr-2 * **Preheat Temperature:** 150-200°C (300-400°F) * **Post-Weld Heat Treatment:** Required to restore properties --- #### **10. Quality Assurance** **Material Certification:** * Full traceability from melt to final product * Certified Mill Test Reports (CMTR) * Heat treatment charts and records * Chemical analysis certificates **Testing Requirements:** * **Chemical Analysis:** Full composition verification * **Mechanical Testing:** Tensile, hardness, impact tests * **Non-Destructive Testing:** UT, PT, MT as specified * **Microstructural Examination:** Grain size, phase distribution * **Thermal Expansion Testing:** For critical applications **Dimensional Inspection:** * Diameter verification at multiple points * Straightness and surface quality assessment * Length and end condition inspection * Compliance with specified tolerances --- **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 rod 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 1976 gallon liquid totes Special package is available on request.