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

British Specs:，American Specs:，German Specs:

### **Technical Datasheet: Alloy 907 / Incoloy 907 Plate / 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 **Plate** product form, which serves as fundamental material for fabricating high-temperature components in aerospace, power generation, and industrial applications. Incoloy 907 Plate offers outstanding performance at temperatures up to 550°C (1020°F), maintaining excellent mechanical properties and dimensional stability under extreme thermal and mechanical stresses, particularly in applications where thermal expansion matching is critical. --- #### **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 * **Excellent Thermal Fatigue Resistance:** Withstands cyclic thermal stresses and thermal shock * **Age-Hardenable:** Achieves optimal strength through precipitation hardening heat treatment * **Good Oxidation Resistance:** Suitable for continuous high-temperature service * **Excellent Structural Stability:** Maintains dimensional stability under thermal cycling * **Good Weldability:** Can be welded using proper procedures and techniques --- #### **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 - Plate)** * **Tensile Strength:** 1280-1420 MPa (185-206 ksi) * **Yield Strength (0.2% Offset):** 1000-1150 MPa (145-167 ksi) * **Elongation:** 10-18% * **Reduction of Area:** 12-20% * **Hardness:** HB 370-420 * **Impact Strength:** 25-45 J (18-33 ft-lb) * **Creep Rupture Strength (540°C/1000°F):** 580 MPa (84 ksi) for 1000 hours --- #### **6. International Standards & Specifications** **Plate Product Standards:** * **AMS 5916:** Nickel Alloy, Corrosion and Heat Resistant, Sheet, Strip, and Plate * **ASTM B670:** Standard Specification for Precipitation-Hardening Nickel Alloy Plate, Sheet, and Strip * **ASTM B906:** General Requirements for Flat-Rolled Nickel and Nickel Alloy Plate, Sheet, and Strip **Material Specifications:** * **AMS 5917:** Nickel Alloy, Corrosion and Heat Resistant, Bars, Forgings, and Rings * **ASTM B637:** Precipitation-Hardening Nickel Alloy Bars, Forgings, and Forging Stock **Dimensional Standards:** * **ASTM B906:** Covers dimensional tolerances for plate products * **ASME SB670:** Nuclear and high-temperature service applications **International Equivalents:** * **UNS:** N19907 * **EN:** NiCr15Fe7NbTi * **DIN:** 2.4665 * **ISO:** 6207 (Nickel alloy plate) --- #### **7. Product Specifications & Availability** **Plate Specifications:** * **Thickness Range:** 5 mm to 150 mm (0.2" to 6") * **Width Range:** 1000 mm to 2000 mm (40" to 80") * **Length Range:** 2000 mm to 6000 mm (80" to 240") * **Tolerance:** Thickness ±5%, Width/Length ±10 mm **Available Conditions:** * **Solution Annealed:** 980-1010°C (1800-1850°F) * **Solution Treated & Aged:** Fully heat treated ready for service * **Hot Rolled:** As-rolled condition for further processing * **Annealed and Pickled:** Clean surface condition **Surface Finish:** * **Hot Rolled Pickled (HRAP):** Standard mill finish * **Machined:** Surface machining available * **Ground:** Precision ground surfaces * **Polished:** Special surface finishes available --- #### **8. Applications** **Aerospace Industry:** * Gas turbine engine casings and components * Turbine shrouds and ring segments * Compressor cases and frames * Engine mount supports and brackets * Aircraft structural panels and heat shields **Power Generation:** * Gas turbine casing components * Steam turbine casing sections * Heat exchanger plates and headers * High-temperature furnace components * Power generation turbine structural parts **Industrial Applications:** * High-temperature pressure vessels * Chemical processing equipment * Heat treatment fixtures and trays * Nuclear reactor structural components * Thermal processing equipment **Specific Component Applications:** * **Structural Components:** Frames, brackets, and supports requiring thermal stability * **Pressure Parts:** Vessel walls and heads for high-temperature service * **Heat Resistant Parts:** Furnace components and heat treatment fixtures * **Sealing Surfaces:** Flanges and mating surfaces requiring dimensional stability --- #### **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:** 0.1-0.3 mm/rev (0.004-0.012 IPR) * **Depth of Cut:** 2-5 mm (0.080-0.200 inches) * **Coolant:** High-pressure coolant essential **Forming Operations:** * **Cold Forming:** Possible with proper tooling design * **Hot Forming:** Recommended for complex shapes (800-1000°C) * **Press Brake Forming:** Suitable for plate forming * **Roll Forming:** For cylindrical sections **Welding Procedures:** * **Weldability:** Good with proper procedures * **Recommended Process:** GTAW (TIG) with pulsed current * **Filler Metal:** AWS A5.14 ERNiFeCr-2 * **Preheat Temperature:** 150-200°C (300-400°F) * **Post-Weld Heat Treatment:** Required to restore properties **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 --- #### **10. Quality Assurance & Testing** **Material Certification:** * Full traceability from melt to final product * Certified Mill Test Reports (CMTR) * Heat treatment charts and records * Chemical analysis certificates **Non-Destructive Testing:** * **Ultrasonic Testing (UT):** Per ASTM A388 for internal quality * **Liquid Penetrant Testing (PT):** Per ASTM E165 for surface defects * **Magnetic Particle Testing (MT):** Per ASTM E709 where applicable * **Radiographic Testing (RT):** For critical welded sections **Destructive Testing:** * **Tensile Testing:** At room and elevated temperatures * **Hardness Surveys:** Multiple locations across plate surface * **Impact Testing:** Charpy V-notch tests * **Microstructural Analysis:** Grain size and phase distribution **Dimensional Inspection:** * Thickness verification at multiple points * Flatness and straightness measurements * Surface quality assessment * 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 plate 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 1980 gallon liquid totes Special package is available on request.