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

British Specs:，American Specs:，German Specs:

### **Product Introduction: Alloy 43PH / Low Expansion 43PH Alloy Wire** **Precision-Drawn Wire for High-Strength Thermal Management Applications** **Alloy 43PH Wire** is a specialized precipitation-hardenable iron-nickel-cobalt alloy wire engineered to deliver exceptional dimensional stability combined with superior mechanical strength in wire form. This precision-drawn wire maintains excellent low thermal expansion characteristics while achieving remarkable strength properties through controlled precipitation hardening heat treatment, making it ideal for critical applications in aerospace, electronics, medical devices, and precision instruments where both thermal stability and mechanical reliability are paramount. --- #### **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 | Surface quality | | **Carbon (C)** | 0.05 max | Formability | | **Chromium (Cr)** | 0.20 max | Surface stability | * **Precision Formulation:** The optimized nickel-cobalt balance ensures consistent low thermal expansion characteristics, while titanium and aluminum enable precipitation hardening for enhanced mechanical properties in wire 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% | 8-12% | | **Reduction of Area** | 55-65% | 20-30% | | **Hardness** | HRB 90-100 | HRC 40-46 | --- #### **4. Product Specifications & Applications** **Wire Specifications:** - **Diameter Range:** 0.005" to 0.250" (0.127 mm to 6.35 mm) - **Diameter Tolerance:** ±0.0001" to ±0.001" - **Spool Sizes:** 5 lb to 50 lb (2.3 kg to 22.7 kg) standard - **Surface Finish:** Bright, cleaned, or specially coated - **Temper Conditions:** Solution treated or precipitation hardened **Primary Applications:** * **Electronics & Semiconductor:** - IC lead frames and connector pins - Hybrid circuit bonding wires - Semiconductor package leads - Microwave component leads * **Aerospace & Defense:** - Aircraft structural wire components - Missile guidance system elements - Satellite structural members - Avionics component leads * **Medical Devices:** - Surgical instrument components - Implantable device elements - Medical sensor wires - Diagnostic equipment parts * **Precision Instruments:** - Spring contacts and connectors - Instrument component wires - Measuring device elements - Optical alignment wires **Specialized Applications:** - High-strength fasteners and fastening wire - Welding electrode cores - Thermal management elements - Vacuum tube components - Research apparatus parts --- #### **5. International Standards & Specifications** **Global Standards Compliance:** - **ASTM F30:** Standard Specification for Iron-Nickel-Cobalt Alloys - **UNS K94680:** Unified Numbering System Designation - **AMS 7726:** Aerospace Material Specification - **MIL-DTL-23488:** Military Specification - **ISO 4950:** High Yield Strength Steel - **DIN 17471:** German Industrial Standard - **JIS C2532:** Japanese Industrial Standard **Quality Specifications:** - **Diameter Tolerance:** ±0.0001" to ±0.001" - **Surface Quality:** Free of seams, cracks, and inclusions - **Spooling Quality:** Uniform winding without tangles - **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 recommended --- #### **6. Technical Advantages & Processing Characteristics** **Manufacturing Excellence:** - **Precision Drawing:** Advanced multi-stage cold drawing process - **Heat Treatment:** Controlled atmosphere processing - **Surface Preparation:** Advanced cleaning and finishing - **Quality Control:** 100% dimensional verification **Performance Benefits:** - **Exceptional Thermal Stability:** Maintains dimensions under thermal cycling - **High Strength-to-Weight Ratio:** Superior mechanical properties - **Excellent Formability:** Suitable for complex bending and forming - **Good Weldability:** Compatible with standard welding techniques **Processing Guidelines:** - **Wire Forming:** Excellent for automatic forming operations - **Machining:** Good machinability with proper techniques - **Heat Treatment:** Essential for achieving optimal properties - **Surface Treatment:** Compatible with various plating processes **Quality Assurance:** - **Chemical Analysis:** Complete material certification - **Mechanical Testing:** Verification of all specified properties - **Dimensional Inspection:** Precision measurement capabilities - **Surface Examination:** Comprehensive quality assessment - **Performance Testing:** Application-specific testing available --- #### **Why Choose Our Alloy 43PH Wire?** * **Premium Quality:** Strict control of chemical composition and microstructure * **Precision Manufacturing:** Exceptional diameter control and surface quality * **Technical Expertise:** Comprehensive application support and guidance * **Quality Assurance:** Full traceability with certified documentation * **Global Compliance:** Meets international standards and specifications * **Proven Reliability:** Extensive track record in critical applications **Value-Added Services:** - Custom spooling and packaging - Special surface treatments - Precision cutting to length - Heat treatment processing - Comprehensive testing services **Contact our technical team** for detailed specifications and application engineering support. We provide complete solutions for your low expansion, high strength alloy wire requirements, ensuring optimal performance in your most demanding thermal management and precision engineering 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 2780 gallon liquid totes Special package is available on request.