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

British Specs:，American Specs:，German Specs:

### **Technical Datasheet: Alloy 907 / Incoloy 907 Strip / 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 characteristics and high strength at elevated temperatures. This datasheet focuses on the **Strip** product form, characterized by its thin, narrow configuration typically supplied in coiled form. Incoloy 907 Strip combines excellent high-temperature properties with superior formability and precise dimensional control, making it ideal for precision components, electrical applications, and specialized industrial uses where both thermal expansion matching and specific dimensional requirements are critical in high-temperature environments up to 550°C (1020°F). --- #### **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 dimensional stability under load * **Excellent Thermal Fatigue Resistance:** Withstands cyclic thermal stresses * **Age-Hardenable:** Achieves optimal strength through precipitation hardening heat treatment * **Excellent Formability:** Can be precision formed and shaped in annealed condition * **Good Spring Properties:** Suitable for spring applications in high-temperature environments * **Precision Thickness Control:** Consistent dimensional accuracy and surface quality * **Consistent Mechanical Properties:** Uniform characteristics throughout the strip length --- #### **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 Strip Products)** | Condition | Tensile Strength (MPa) | Yield Strength (MPa) | Elongation (%) | Hardness (HV) | | :--- | :--- | :--- | :--- | :--- | | **Annealed** | 700-850 | 550-700 | 20-30 | 250-320 | | **Hard Temper** | 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** **Strip 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 strip products * **Thickness Tolerance:** Typically ±0.005mm to ±0.02mm **International Equivalents:** * **UNS:** N19907 * **EN:** NiCr15Fe7NbTi * **DIN:** 2.4665 * **ISO:** 6207 (Nickel alloy strip) --- #### **7. Product Specifications & Availability** **Strip Specifications:** * **Thickness Range:** 0.05 mm to 2.0 mm (0.002" to 0.080") * **Width Range:** 10 mm to 300 mm (0.4" to 12") * **Coil Weight:** 50 kg to 500 kg (110 lbs to 1100 lbs) * **Tolerance:** Thickness ±0.005mm to ±0.02mm depending on thickness * **Width Tolerance:** Typically ±0.1mm to ±0.5mm **Available Conditions:** * **Solution Annealed:** Optimal for forming and machining * **Hard Temper:** For applications requiring higher strength * **Spring Temper:** Maximum strength and spring properties * **Solution Treated & Aged:** Fully heat treated condition * **Custom Tempers:** Quarter-hard, half-hard available **Surface Finish:** * **Bright Annealed (BA):** Smooth, reflective surface * **Cold Rolled:** Standard mill finish * **Polished:** Special surface requirements * **Coated:** Protective coatings available --- #### **8. Applications** **Aerospace Industry:** * Gas turbine engine seals and gaskets * Turbine shroud segments * High-temperature spring components * Instrumentation and sensor elements * Thermal protection system components **Electrical & Electronic:** * High-temperature electrical contacts and springs * Spring contacts for elevated temperature service * Battery and fuel cell components * Semiconductor processing equipment parts * Electrical resistance heating elements **Industrial Components:** * High-temperature springs and spring washers * Diaphragms and bellows for corrosive service * Precision stamping components * Heat treatment fixture components * Turbine seal strips and sealing elements **Power Generation:** * Turbine seal strips and components * High-temperature spring elements * Instrumentation components * Thermal management system parts **Specific Applications:** * **Annealed Strip:** Formed components, deep drawn parts * **Hard Temper:** Structural components, fasteners * **Spring Temper:** High-temperature springs, clip fasteners * **Aged Condition:** Critical high-temperature components --- #### **9. Processing & Fabrication** **Forming Operations:** * **Blank and Pierce:** Suitable for precision blanking operations * **Bending:** Excellent bend capability in annealed condition * **Deep Drawing:** Good deep draw characteristics * **Stamping:** Can be stamped into complex shapes * **Roll Forming:** Suitable for continuous forming operations * **Progressive Die Forming:** Ideal for high-volume production **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 **Joining Methods:** * **Resistance Welding:** Spot and seam welding * **GTAW:** Precision welding for critical applications * **Brazing:** Using nickel-based brazing alloys * **Adhesive Bonding:** For specific assembly requirements * **Mechanical Fastening:** Riveting, clinching --- #### **10. Quality Assurance & Testing** **Dimensional Control:** * Thickness monitoring at multiple points across strip width * Width and edge condition inspection * Coil flatness and surface quality assessment * Camber and straightness verification **Mechanical Testing:** * Tensile testing per ASTM E8 * Hardness surveys across strip width * Springback and formability tests * Microstructural examination **Non-Destructive Testing:** * **Eddy Current Testing:** For surface defects and consistency * **Visual Inspection:** Per ASTM A480 * **Surface Roughness Measurement:** For critical applications **Certification & Documentation:** * Full traceability with material certifications * Heat treatment records and charts * 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 strip 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 1982 gallon liquid totes Special package is available on request.