Alloy 907,Incoloy 907 Other/Similar Specs,UNS N19907,E FORU

British Specs:，American Specs:，German Specs:

### Technical Datasheet: Alloy 907 / Incoloy 907 - Other/Similar Specifications / 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 covers alternative and similar international specifications for Alloy 907, providing comprehensive cross-reference information for global projects and equivalent material selection. The alloy maintains excellent mechanical properties and dimensional stability at temperatures up to 550°C (1020°F) and is widely specified across various international standards systems. --- #### 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:** Can be strengthened through precipitation hardening heat treatment * **Good Oxidation Resistance:** Suitable for continuous high-temperature service * **Dimensional Stability:** Maintains precise dimensions under thermal cycling --- #### 3. Chemical Composition (Weight %) - Cross Reference | Element | UNS N19907 | AMS 5916 | DIN 2.4665 | EN NiCr15Fe7NbTi | | :--- | :--- | :--- | :--- | :--- | | **Nickel (Ni)** | 35.0-40.0 | 35.0-40.0 | 35.0-40.0 | 35.0-40.0 | | **Iron (Fe)** | Balance | Balance | Balance | Balance | | **Cobalt (Co)** | 12.0-16.0 | 12.0-16.0 | 12.0-16.0 | 12.0-16.0 | | **Niobium (Nb)** | 4.3-5.2 | 4.3-5.2 | 4.3-5.2 | 4.3-5.2 | | **Titanium (Ti)** | 1.3-1.8 | 1.3-1.8 | 1.3-1.8 | 1.3-1.8 | | **Aluminum (Al)** | 0.05-0.25 | 0.05-0.25 | 0.05-0.25 | 0.05-0.25 | | **Carbon (C)** | 0.01-0.05 | 0.01-0.05 | 0.01-0.05 | 0.01-0.05 | | **Boron (B)** | 0.003-0.012 | 0.003-0.012 | 0.003-0.012 | 0.003-0.012 | --- #### 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** | 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** | 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 Comparison (Aged Condition) | Property | AMS 5917 | ASTM B564 | DIN 2.4665 | EN NiCr15Fe7NbTi | | :--- | :--- | :--- | :--- | :--- | | **Tensile Strength** | 1310 MPa min | 1280 MPa min | 1280-1420 MPa | 1280 MPa min | | **Yield Strength** | 1030 MPa min | 1000 MPa min | 1000-1150 MPa | 1000 MPa min | | **Elongation** | 8% min | 10% min | 10-18% | 10% min | | **Hardness** | HB 380 min | HB 370 min | HB 370-420 | HB 370 min | --- #### 6. International Standards & Cross-References **North American Standards:** * **UNS:** N19907 * **ASTM:** B564 (Forgings), B670 (Plate, Sheet, Strip), B637 (Bars) * **AMS:** 5916 (Sheet, Strip, Plate), 5917 (Bars, Forgings, Rings) * **ASME:** SB564, SB670, SB637 * **AWS:** A5.14 ERNiFeCr-2 **European Standards:** * **EN:** NiCr15Fe7NbTi * **DIN:** 2.4665 * **AFNOR:** NC15K10DAT * **UNI:** X5NiCrTi26-15 * **BS:** HR 907 **Other International Standards:** * **JIS:** NCF 907 * **GB:** GH2907 (Chinese equivalent) * **GOST:** ЭИ868 (Russian equivalent) * **ISO:** 6207 (Nickel alloy plate, sheet, strip) --- #### 7. Heat Treatment Specifications **Solution Treatment:** * **Temperature Range:** 980-1010°C (1800-1850°F) * **Cooling Method:** Rapid cooling (air cool or oil quench) * **Atmosphere Control:** Controlled atmosphere recommended **Aging Treatment Variations:** * **Standard Aging:** * Primary: 720-745°C (1330-1375°F) for 8 hours * Secondary: 620-650°C (1150-1200°F) for 8 hours * **Alternative Aging:** 730-760°C (1350-1400°F) for 16 hours (some specifications) --- #### 8. Applications by Industry **Aerospace Industry:** * Gas turbine engine components * Turbine shrouds and rings * Compressor cases * Engine structural components * Aircraft mounting systems **Power Generation:** * Gas turbine casing components * Steam turbine seals * High-temperature fasteners * Power generation turbine components * Nuclear power plant components **Oil & Gas Industry:** * Wellhead components * Downhole tools * High-pressure equipment * Subsea components * Refinery equipment **Industrial Applications:** * High-temperature bolts and studs * Nuclear reactor components * Chemical processing equipment * Heat treatment fixtures * Thermal processing equipment --- #### 9. Product Forms & Specifications **Wrought Products:** * **Bars & Rods:** AMS 5917, ASTM B637 * **Forgings:** ASTM B564, AMS 5917 * **Sheet & Plate:** AMS 5916, ASTM B670 * **Strip & Foil:** AMS 5916 * **Tube & Pipe:** ASTM B163, B829 **Semi-Finished Products:** * **Billets:** For forging and re-rolling * **Blooms:** Large cross-sections * **Slabs:** For plate rolling * **Wire:** For fasteners and springs --- #### 10. Important Notes on Equivalency * **Regional Variations:** While chemical compositions are generally similar, minor variations may exist in impurity elements and processing requirements * **Testing Requirements:** Different standards may specify varying testing methods and acceptance criteria * **Heat Treatment:** Some specifications may have slightly different heat treatment parameters * **Certification:** Always verify material certifications against the specific project requirements * **Technical Approval:** Consult with materials engineers when substituting materials between different standards * **Documentation Requirements:** Certification requirements may vary between standards --- #### 11. Quality Assurance Requirements **Documentation:** * **Certification:** Mill certificates per EN 10204 3.1/3.2 or equivalent * **Traceability:** Full material traceability from melt to final product * **Testing Reports:** Complete mechanical and chemical test data * **Process Records:** Heat treatment charts and manufacturing records **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 --- **Disclaimer:** This cross-reference information is provided for guidance only. While every effort has been made to ensure accuracy, specifications are subject to change. Always consult the latest edition of the relevant standards and work with qualified materials engineers for critical applications. Actual properties and processing requirements may vary between different standard systems and manufacturers.

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 1985 gallon liquid totes Special package is available on request.