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

British Specs:，American Specs:，German Specs:

### **Technical Datasheet: Alloy 907 / Incoloy 907 Sheet / UNS N19907** --- #### **1. Overview** **Alloy 907** (commercially known as **Incoloy® 907**) is a nickel-iron-cobalt-niobium precipitation-hardening superalloy specifically engineered for applications requiring low thermal expansion and high strength at elevated temperatures. This datasheet focuses on the **Sheet** product form, characterized by its thin, flat configuration typically supplied in thicknesses up to 6mm. Incoloy 907 Sheet combines excellent high-temperature properties with good formability, making it ideal for aerospace, power generation, and industrial applications where thermal expansion matching, high strength-to-weight ratio, and dimensional stability at temperatures up to 550°C (1020°F) are critical requirements. --- #### **2. Key Characteristics** * **Low Thermal Expansion:** Controlled expansion characteristics matching adjacent 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 Formability:** Can be formed and shaped in the solution-treated condition * **Excellent Oxidation Resistance:** Suitable for continuous high-temperature service * **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 - Sheet)** * **Tensile Strength:** 1280-1420 MPa (185-206 ksi) * **Yield Strength (0.2% Offset):** 1000-1150 MPa (145-167 ksi) * **Elongation:** 12-20% * **Hardness:** HB 370-420 * **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** **Sheet 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 sheet products * **ASME SB670:** Nuclear and high-temperature service applications **International Equivalents:** * **UNS:** N19907 * **EN:** NiCr15Fe7NbTi * **DIN:** 2.4665 * **ISO:** 6207 (Nickel alloy sheet) --- #### **7. Product Specifications & Availability** **Sheet Specifications:** * **Thickness Range:** 0.5 mm to 6.0 mm (0.020" to 0.250") * **Width Range:** 600 mm to 1500 mm (24" to 60") * **Length Range:** 1000 mm to 3000 mm (40" to 120") * **Tolerance:** Thickness ±0.05mm to ±0.15mm depending on thickness **Available Conditions:** * **Solution Annealed:** 980-1010°C (1800-1850°F) * **Solution Treated & Aged:** Fully heat treated ready for service * **Cold Rolled:** For improved surface finish and dimensional control **Surface Finish:** * **No. 1:** Hot rolled, annealed, and pickled * **No. 2D:** Cold rolled, dull finish * **No. 2B:** Cold rolled, bright finish * **Polished:** Special surface finishes available * **BA (Bright Annealed):** Smooth, reflective surface --- #### **8. Applications** **Aerospace Industry:** * Gas turbine engine seals and gaskets * Turbine shroud segments * Engine cowlings and fairings * Heat shield and thermal protection systems * Aircraft engine control system components **Power Generation:** * Gas turbine combustion liners * Heat shield components * Exhaust system components * Thermal protection system panels * Boiler and heat exchanger components **Industrial Applications:** * High-temperature furnace components * Heat treatment fixtures and baskets * Chemical processing equipment liners * Nuclear reactor components * High-temperature ducting systems **Specific Component Applications:** * **Thin-Wall Structures:** Lightweight high-temperature components * **Heat Exchangers:** Plate-type heat exchanger sheets * **Protective Liners:** Corrosion and heat-resistant linings * **Sealing Elements:** High-temperature gaskets and seals --- #### **9. Processing & Fabrication** **Forming Operations:** * **Bending:** Minimum bend radius 2-3 times sheet thickness * **Deep Drawing:** Good deep draw characteristics in annealed condition * **Stretch Forming:** Suitable for complex contours and aircraft components * **Spinning:** Can be spun to shape with proper tooling * **Press Forming:** Suitable for high-volume production **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) * **Coolant:** High-pressure coolant essential * **Tool Geometry:** Positive rake angles recommended **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) * **Interpass Temperature:** 120-180°C (250-350°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 * **Stress Relieving:** 600-630°C (1110-1170°F) for 1-2 hours --- #### **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 * **Eddy Current Testing:** For surface and near-surface defects * **Visual Inspection:** Per ASTM A480 **Destructive Testing:** * **Tensile Testing:** At room and elevated temperatures per ASTM E8 * **Hardness Surveys:** Multiple locations across sheet surface * **Bend Tests:** For formability assessment * **Microstructural Analysis:** Grain size and phase distribution **Dimensional Inspection:** * Thickness verification at multiple points * Flatness and surface quality assessment * Width and length verification * Surface finish measurement --- **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 sheet 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 1981 gallon liquid totes Special package is available on request.