Alloy 43ph，Low expansion 43Ph Alloy Fittings，,E FORU

British Specs:，American Specs:，German Specs:

### **Product Introduction: Alloy 43PH / Low Expansion 43PH Alloy Fittings** **Precision Engineered Components for High-Strength Thermal Management Systems** **Alloy 43PH Fittings** are specialized components manufactured from premium precipitation-hardenable iron-nickel-cobalt alloy, designed to maintain dimensional stability and deliver superior mechanical performance in applications requiring precise thermal management. These precision-engineered fittings combine the exceptional low thermal expansion characteristics of Alloy 43PH with high strength properties achieved through controlled precipitation hardening, making them ideal for critical applications in aerospace, semiconductor, and energy industries. --- #### **1. Chemical Composition (Weight %)** | Element | Content (%) | Control Significance | | :--- | :--- | :--- | | **Nickel (Ni)** | 42.0 - 43.0 | Primary expansion control | | **Cobalt (Co)** | 5.0 - 6.0 | Precipitation hardening control | | **Titanium (Ti)** | 2.0 - 2.5 | Primary strengthening element | | **Aluminum (Al)** | 0.5 - 0.8 | Secondary strengthening | | **Iron (Fe)** | Balance | Matrix formation | | **Manganese (Mn)** | 0.50 max | Deoxidation control | | **Silicon (Si)** | 0.30 max | Deoxidation agent | | **Carbon (C)** | 0.05 max | Weldability and toughness | | **Chromium (Cr)** | 0.20 max | Surface stability | | **Copper (Cu)** | 0.20 max | Minor alloying element | * **Precision Engineering:** The optimized chemical composition ensures minimal thermal expansion while providing excellent precipitation hardening capability for high-strength fitting applications. --- #### **2. Physical Properties** | Property | Value | | :--- | :--- | | **Density** | 8.10 g/cm³ | | **Melting Point** | 1430°C | | **Thermal Conductivity** | 15.2 W/m·K | | **Mean CTE (20-300°C)** | 5.0-6.0 × 10⁻⁶/°C | | **Specific Heat Capacity** | 450 J/kg·K | | **Electrical Resistivity** | 85 μΩ·cm | | **Modulus of Elasticity** | 155 GPa | | **Curie Temperature** | 250°C | --- #### **3. Mechanical Properties** | Property | Solution Treated | Precipitation Hardened | | :--- | :--- | :--- | | **Tensile Strength** | 85-105 ksi (586-724 MPa) | 180-220 ksi (1241-1517 MPa) | | **Yield Strength (0.2%)** | 50-70 ksi (345-483 MPa) | 170-200 ksi (1172-1379 MPa) | | **Elongation** | 25-35% | 10-15% | | **Hardness** | HRB 90-100 | HRC 38-44 | | **Impact Strength** | 40-60 ft-lb | 25-40 ft-lb | --- #### **4. Product Specifications & Applications** **Available Fitting Types:** - **Pipe Fittings:** Elbows (45°, 90°), tees, reducers, couplings, caps - **Flange Fittings:** Weld neck, slip-on, blind, socket weld flanges - **Specialized Fittings:** Adapters, unions, bushings, nipple fittings - **Custom Components:** Manufacturer-specific designs and configurations **Primary Applications:** * **Aerospace & Defense:** - Aircraft hydraulic system fittings - Missile propulsion system components - Satellite fuel management systems - Avionics cooling circuit fittings * **Semiconductor Industry:** - Ultra-pure chemical delivery systems - Process gas distribution networks - Vacuum system components - Wafer processing equipment fittings * **Energy Sector:** - Nuclear instrumentation fittings - Thermal management system components - Power generation equipment - Fuel cell system fittings * **Precision Instrumentation:** - Laser system plumbing fittings - Cryogenic transfer system components - Optical instrument fittings - Laboratory apparatus connections **Specialized Applications:** - High-pressure thermal compensation assemblies - Ultra-high vacuum system fittings - Precision fluid handling systems - Chemical processing equipment - Research and development apparatus --- #### **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 K94680:** Unified Numbering System Designation - **AMS 7726:** 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 **Heat Treatment Specifications:** - **Solution Treatment:** 1650-1700°F (899-927°C) - **Aging Treatment:** 900°F (482°C) for 8 hours - **Cooling Rate:** Air cool or faster - **Atmosphere Control:** Protective atmosphere required --- #### **6. Technical Advantages & Processing Characteristics** **Manufacturing Benefits:** - **Exceptional Thermal Stability:** Maintains dimensional integrity under thermal cycling - **High Strength-to-Weight Ratio:** Superior mechanical properties - **Excellent Corrosion Resistance:** Suitable for aggressive chemical environments - **Good Weldability:** Compatible with standard welding techniques - **Long Service Life:** Maintains properties in extreme service conditions **Fabrication Guidelines:** - **Machining:** Optimal in solution treated condition - **Welding:** Use matching filler metals for best results - **Heat Treatment:** Essential for achieving design properties - **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 43PH Fittings?** * **Premium Quality:** Strict control of chemical composition and microstructure * **Precision Manufacturing:** Excellent dimensional accuracy and surface quality * **Technical Expertise:** Comprehensive heat treatment 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 support - Complete machining capabilities - Heat treatment processing - Special surface preparations - Performance testing and validation - Comprehensive technical documentation **Contact our engineering team** for specific application requirements and technical support. We provide complete solutions for your low expansion, high strength alloy fitting needs, from design consultation to manufacturing and quality assurance, ensuring optimal performance in your most demanding thermal management and high-strength 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 2776 gallon liquid totes Special package is available on request.