Alloy 39，Low Expansion 39 Alloy Fittings，,E FORU

British Specs:，American Specs:，German Specs:

### **Product Introduction: Alloy 39 / Low Expansion 39 Alloy Fittings** **Precision Engineered Components for Critical Thermal Management Systems** **Alloy 39 Fittings** are specialized components manufactured from premium low expansion nickel-iron-cobalt alloy, designed to maintain dimensional stability and reliable performance in applications requiring precise thermal management. These precision-engineered fittings combine the exceptional thermal characteristics of Alloy 39 with advanced manufacturing techniques to deliver superior performance in semiconductor, aerospace, and scientific instrumentation applications. --- #### **1. Chemical Composition (Weight %)** | Element | Content (%) | Control Significance | | :--- | :--- | :--- | | **Nickel (Ni)** | 38.0 - 40.0 | Primary thermal expansion control | | **Cobalt (Co)** | 14.0 - 16.0 | Secondary expansion adjustment | | **Iron (Fe)** | Balance | Matrix structure formation | | **Manganese (Mn)** | 0.50 max | Deoxidation and sulfur control | | **Silicon (Si)** | 0.30 max | Deoxidation agent | | **Carbon (C)** | 0.05 max | Weldability and corrosion resistance | | **Chromium (Cr)** | 0.20 max | Surface stability | | **Aluminum (Al)** | 0.10 max | Deoxidation element | | **Copper (Cu)** | 0.20 max | Minor alloying element | | **Titanium (Ti)** | 0.10 max | Grain refinement | | **Sulfur (S)** | 0.015 max | Hot workability control | | **Phosphorus (P)** | 0.015 max | Ductility and toughness | * **Precision Engineering:** The optimized chemical composition ensures minimal thermal expansion while maintaining excellent mechanical properties and corrosion resistance in fitting applications. --- #### **2. Physical Properties** | Property | Value | Condition | | :--- | :--- | :--- | | **Density** | 8.17 g/cm³ | 20°C | | **Melting Point** | 1450°C | Approximate | | **Thermal Conductivity** | 14.5 W/m·K | 20°C | | **Mean CTE (20-300°C)** | 4.5-5.5 × 10⁻⁶/°C | - | | **Specific Heat Capacity** | 460 J/kg·K | 20°C | | **Electrical Resistivity** | 75 μΩ·cm | 20°C | | **Modulus of Elasticity** | 152 GPa | 20°C | | **Curie Temperature** | 230°C | - | --- #### **3. Mechanical Properties** | Property | Standard Fittings | High-Performance Fittings | | :--- | :--- | :--- | | **Tensile Strength** | 75-95 ksi (517-655 MPa) | 95-115 ksi (655-793 MPa) | | **Yield Strength (0.2%)** | 45-65 ksi (310-448 MPa) | 75-95 ksi (517-655 MPa) | | **Elongation** | 25-35% | 20-30% | | **Hardness** | HRB 80-90 | HRB 90-100 | | **Impact Strength** | 35-55 ft-lb | 30-50 ft-lb | --- #### **4. Product Specifications & Applications** **Available Fitting Types:** - **Pipe Fittings:** Elbows, tees, reducers, couplings - **Flange Fittings:** Weld neck, slip-on, blind flanges - **Specialized Fittings:** Adapters, unions, bushings - **Custom Components:** Manufacturer-specific designs **Primary Applications:** * **Semiconductor Industry:** - Ultra-pure chemical delivery systems - Process gas distribution networks - Vacuum system components - Wafer processing equipment * **Aerospace & Defense:** - Aircraft hydraulic systems - Fuel management components - Environmental control systems - Avionics cooling circuits * **Scientific Research:** - Cryogenic transfer systems - Vacuum chamber fittings - Laboratory instrumentation - Research reactor components * **Precision Manufacturing:** - Laser system plumbing - Optical instrument components - Measuring equipment fittings - Thermal management systems **Specialized Applications:** - Ultra-high vacuum systems - Thermal compensation assemblies - Precision fluid handling systems - Nuclear instrumentation - Medical equipment components --- #### **5. International Standards & Specifications** **Global Standards Compliance:** - **ASTM F30:** Standard Specification for Iron-Nickel-Cobalt Alloys - **ASME B16.11:** Forged Steel Fittings, Socket-Welding and Threaded - **ASME B16.9:** Factory-Made Wrought Butt welding Fittings - **UNS K94670:** Unified Numbering System Designation - **AMS 7725:** Aerospace Material Specification - **MIL-DTL-23488:** Military Specification - **ISO 4950:** High Yield Strength Steel **Quality Specifications:** - **Pressure Ratings:** Class 2000 to Class 6000 - **Size Range:** 1/8" to 4" NPT - **Surface Finish:** 32-125 μin Ra - **Dimensional Tolerance:** ±0.005" to ±0.015" - **Certification:** EN 10204 3.1/3.2 with full traceability --- #### **6. Technical Advantages & Processing Characteristics** **Manufacturing Benefits:** - **Exceptional Thermal Stability:** Maintains dimensional integrity under thermal cycling - **Superior Corrosion Resistance:** Suitable for aggressive chemical environments - **Excellent Machinability:** Precision manufacturing capabilities - **Good Weldability:** Compatible with standard welding techniques - **Long Service Life:** Maintains properties in extreme conditions **Fabrication Guidelines:** - **Machining:** Use sharp tools with positive rake angles - **Welding:** Employ matching filler metals for optimal results - **Heat Treatment:** Stress relieve at 425-540°C after welding - **Surface Treatment:** Passivation recommended for corrosion resistance - **Testing:** Hydrostatic and pneumatic testing capabilities **Quality Assurance:** - **Chemical Analysis:** Complete material certification - **Mechanical Testing:** Verification of all specified properties - **Non-Destructive Testing:** UT, RT, MT, PT as required - **Dimensional Inspection:** Full compliance with specifications - **Pressure Testing:** Hydrostatic and pneumatic tests - **Traceability:** Full material history documentation --- #### **Why Choose Our Alloy 39 Fittings?** * **Premium Quality:** Strict control of chemical composition and microstructure * **Precision Manufacturing:** Excellent dimensional accuracy and surface quality * **Technical Expertise:** Comprehensive application support and guidance * **Quality Assurance:** Full certification and traceability * **Global Compliance:** Meets international standards and specifications * **Proven Reliability:** Extensive track record in critical applications **Value-Added Services:** - Custom design and engineering - Complete machining capabilities - Special surface preparations - Performance testing and validation - Technical documentation support **Contact our engineering team** for specific application requirements and technical support. We provide complete solutions for your low expansion alloy fitting needs, from design consultation to manufacturing and quality assurance, ensuring optimal performance in your most demanding thermal management 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 2763 gallon liquid totes Special package is available on request.