Alloy 39，Low Expansion 39 Alloy Forgings，,E FORU

British Specs:，American Specs:，German Specs:

### **Product Introduction: Alloy 39 / Low Expansion 39 Alloy Forgings** **Premium Forged Components for Critical Thermal Management Applications** **Alloy 39 Forgings** represent the highest standard in manufacturing quality for components requiring exceptional dimensional stability and controlled thermal expansion under demanding service conditions. Through the controlled forging process, this nickel-iron-cobalt alloy develops enhanced mechanical properties, refined grain structure, and superior directional strength, making it the preferred choice for critical applications in aerospace, semiconductor, and precision instrumentation industries. --- #### **1. Chemical Composition (Weight %)** | Element | Content (%) | | :--- | :--- | | **Nickel (Ni)** | 38.0 - 40.0 | | **Cobalt (Co)** | 14.0 - 16.0 | | **Iron (Fe)** | Balance | | **Manganese (Mn)** | 0.50 max | | **Silicon (Si)** | 0.30 max | | **Carbon (C)** | 0.05 max | | **Chromium (Cr)** | 0.20 max | | **Aluminum (Al)** | 0.10 max | | **Copper (Cu)** | 0.20 max | | **Titanium (Ti)** | 0.10 max | | **Sulfur (S)** | 0.015 max | | **Phosphorus (P)** | 0.015 max | * **Precision Alloy Control:** The exact chemical composition is meticulously maintained throughout the forging process to ensure consistent thermal expansion characteristics and optimal mechanical properties in the final forged components. --- #### **2. Physical Properties** | Property | Value | | :--- | :--- | | **Density** | 8.17 g/cm³ | | **Melting Point** | 1450°C | | **Thermal Conductivity** | 14.5 W/m·K | | **Mean CTE (20-300°C)** | 4.5-5.5 × 10⁻⁶/°C | | **Specific Heat Capacity** | 460 J/kg·K | | **Electrical Resistivity** | 75 μΩ·cm | | **Modulus of Elasticity** | 152 GPa | | **Forging Temperature Range** | 1150-1250°C | --- #### **3. Mechanical Properties** | Property | Forged & Annealed | Forged & Heat Treated | | :--- | :--- | :--- | | **Tensile Strength** | 80-100 ksi (552-690 MPa) | 100-120 ksi (690-827 MPa) | | **Yield Strength (0.2%)** | 50-70 ksi (345-483 MPa) | 80-100 ksi (552-690 MPa) | | **Elongation** | 30-40% | 20-30% | | **Reduction of Area** | 50-65% | 40-55% | | **Hardness** | HRB 80-90 | HRB 90-100 | | **Impact Toughness** | 40-60 ft-lb | 30-50 ft-lb | --- #### **4. Product Specifications & Applications** **Forging Capabilities:** - **Open Die Forgings:** Up to 500 kg components - **Closed Die Forgings:** Complex geometries and near-net shapes - **Ring Rolled Forgings:** 100 mm to 2000 mm diameters - **Custom Shapes:** Manufacturer-specific designs **Primary Applications:** * **Aerospace & Defense:** - Satellite structural components - Missile guidance system housings - Aircraft engine mounts - Radar system structural elements * **Semiconductor Manufacturing:** - Wafer handling system components - Vacuum chamber structural parts - Etching equipment frames - Lithography system mounts * **Precision Instrumentation:** - Laser system structural frames - Optical measuring equipment bases - Telescope mount components - Interferometer structural elements * **Energy Sector:** - Nuclear instrument housings - Solar panel manufacturing equipment - Fuel cell system components - Power generation equipment **Specialized Applications:** - Cryogenic equipment components - Ultra-high vacuum system parts - Thermal management system elements - Precision manufacturing fixtures - Research equipment components --- #### **5. International Standards & Specifications** **Global Standards Compliance:** - **ASTM F30:** Standard Specification for Iron-Nickel-Cobalt Alloys - **ASTM B564:** Standard Specification for Nickel Alloy Forgings - **UNS K94670:** Unified Numbering System Designation - **AMS 7725:** Aerospace Material Specification - **MIL-DTL-23488:** Military Specification - **ISO 4950:** High Yield Strength Steel - **DIN 17470:** German Industrial Standard **Quality Specifications:** - **Forging Quality Levels:** Grade B, Class 1, 2, 3 available - **Non-Destructive Testing:** UT, RT, MT, PT as required - **Dimensional Inspection:** Per customer specifications - **Metallurgical Testing:** Grain flow verification - **Certification:** Comprehensive documentation package --- #### **6. Technical Advantages & Processing Characteristics** **Manufacturing Benefits:** - **Superior Grain Structure:** Optimized directional strength properties - **Enhanced Mechanical Properties:** Improved fatigue and stress rupture life - **Elimination of Defects:** No internal voids or porosity - **Improved Reliability:** Consistent performance in critical applications - **Thermal Stability:** Maintains dimensional integrity under thermal cycling **Quality Assurance Protocols:** - **Billet Conditioning:** Ultrasonic testing of starting material - **Process Control:** Monitoring of all forging parameters - **Heat Treatment:** Controlled solution annealing and aging - **Final Inspection:** Comprehensive verification of all requirements **Machining & Fabrication:** - **Excellent Machinability:** Good tool life and surface finish - **Weldability:** Compatible with standard welding processes - **Stability:** Maintains dimensional accuracy after machining - **Consistency:** Uniform properties throughout components --- #### **Why Choose Our Alloy 39 Forgings?** * **Premium Quality:** Strict control of forging parameters and thermal processing * **Enhanced Properties:** Superior mechanical characteristics through grain refinement * **Technical Expertise:** Comprehensive engineering support * **Quality Assurance:** Multiple NDT methods and full documentation * **Global Compliance:** Meets international standards and customer specifications * **Proven Reliability:** Extensive experience in critical applications **Value-Added Services:** - Custom forging design consultation - Complete machining capabilities - Heat treatment processing - Non-destructive testing services - Comprehensive certification packages **Contact our forging specialists** for technical consultation and quotation requirements. We provide complete solutions for your low expansion alloy forging needs, from initial design through final certification, ensuring the highest levels of quality and performance for your most demanding applications.

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 2764 gallon liquid totes Special package is available on request.