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

British Specs:，American Specs:，German Specs:

### **Product Introduction: Alloy 43PH / Low Expansion 43PH Alloy Tube** **Precision Tubing for High-Strength Thermal Management Applications** **Alloy 43PH Tube** is a specialized precipitation-hardenable iron-nickel-cobalt alloy tubing engineered to provide exceptional dimensional stability combined with superior mechanical strength in precision applications. This advanced material 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, semiconductor, medical, and scientific instrumentation industries. --- #### **1. Chemical Composition (Weight %)** | Element | Content (%) | | :--- | :--- | | **Nickel (Ni)** | 42.0 - 43.0 | | **Cobalt (Co)** | 5.0 - 6.0 | | **Titanium (Ti)** | 2.0 - 2.5 | | **Aluminum (Al)** | 0.5 - 0.8 | | **Iron (Fe)** | Balance | | **Manganese (Mn)** | 0.50 max | | **Silicon (Si)** | 0.30 max | | **Carbon (C)** | 0.05 max | | **Chromium (Cr)** | 0.20 max | | **Copper (Cu)** | 0.20 max | * **Precision Engineering:** The optimized nickel-cobalt balance ensures minimal thermal expansion, while titanium and aluminum additions enable precipitation hardening for enhanced mechanical properties in tubular 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 | | **Collapse Pressure** | OD and wall dependent | OD and wall dependent | --- #### **4. Product Specifications & Applications** **Tube Specifications:** - **Types Available:** Seamless, Welded & Redrawn - **Diameter Range:** 0.010" to 4.000" OD (0.25mm to 101.6mm) - **Wall Thickness:** 0.002" to 0.125" (0.05mm to 3.18mm) - **Lengths:** Standard 12-foot, custom lengths available - **Tolerances:** ±0.0005" to ±0.005" (size dependent) **Primary Applications:** * **Aerospace & Defense:** - Aircraft hydraulic system tubing - Missile guidance system components - Satellite structural elements - Avionics cooling conduits * **Semiconductor Equipment:** - Process gas delivery lines - Chemical distribution systems - Vacuum chamber components - Wafer handling system tubing * **Medical Devices:** - Medical instrument components - Surgical device tubing - Implantable device housings - Diagnostic equipment parts * **Scientific Research:** - Cryogenic transfer lines - Vacuum system components - Laboratory apparatus tubing - Research instrument housings **Specialized Applications:** - Laser system components - Optical instrument structures - Precision measurement devices - Thermal management systems - Ultra-high vacuum applications --- #### **5. International Standards & Specifications** **Global Standards Compliance:** - **ASTM F30:** Standard Specification for Iron-Nickel-Cobalt Alloys - **ASTM B722:** Nickel-Iron-Chromium Alloy Seamless Tube - **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 **Quality Specifications:** - **Dimensional Tolerances:** ASTM A632 compliant - **Surface Finish:** 0.4-0.8 μm Ra (internal) - **Straightness:** 0.001" per foot maximum - **Concentricity:** 90% minimum wall uniformity - **Certification:** EN 10204 3.1/3.2 available **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 cold drawing technology - **Surface Quality:** Superior internal and external finishes - **Heat Treatment:** Controlled atmosphere processing - **Quality Control:** 100% dimensional verification **Performance Benefits:** - **Exceptional Thermal Stability:** Maintains dimensions under thermal cycling - **High Strength-to-Weight Ratio:** Superior mechanical properties - **Excellent Corrosion Resistance:** Suitable for aggressive environments - **Good Fabricability:** Easy to bend, form, and machine **Fabrication Guidelines:** - **Bending:** Minimum radius 2x tube diameter - **Welding:** Use matching filler metals - **Machining:** Excellent in solution treated condition - **Heat Treatment:** Critical for property development **Quality Assurance:** - **Chemical Analysis:** Complete material certification - **Mechanical Testing:** Verification of all properties - **Non-Destructive Testing:** UT, eddy current available - **Dimensional Inspection:** Precision measurement - **Performance Validation:** Application-specific testing --- #### **Why Choose Our Alloy 43PH Tube?** * **Premium Quality:** Strict control of composition and microstructure * **Precision Manufacturing:** Exceptional dimensional accuracy * **Technical Expertise:** Comprehensive application support * **Quality Assurance:** Full traceability and certification * **Global Compliance:** Meets international standards * **Proven Reliability:** Extensive performance history **Value-Added Services:** - Precision cutting to length - Custom end finishing - Heat treatment processing - Special cleaning and packaging - 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 tube 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 2772 gallon liquid totes Special package is available on request.