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

British Specs:，American Specs:，German Specs:

### **Product Introduction: Alloy 43PH / Low Expansion 43PH Alloy Pipe** **Precision Tubing for High-Strength Thermal Management Applications** **Alloy 43PH Pipe** is a specialized precipitation-hardenable iron-nickel-cobalt alloy tubing engineered to provide exceptional dimensional stability combined with high mechanical strength in piping applications. This advanced material maintains excellent low thermal expansion characteristics while achieving superior strength properties through controlled precipitation hardening, making it ideal for critical applications in aerospace, semiconductor, and energy industries where both thermal stability and structural integrity 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 | 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 | * **Optimized Formula:** The precise balance of nickel and cobalt ensures minimal thermal expansion, while titanium and aluminum enable precipitation hardening for enhanced mechanical properties in piping applications. --- #### **2. Physical Properties** | Property | Value | Condition | | :--- | :--- | :--- | | **Density** | 8.10 g/cm³ | 20°C | | **Melting Point** | 1430°C | Approximate | | **Thermal Conductivity** | 15.2 W/m·K | 20°C | | **Mean CTE (20-300°C)** | 5.0-6.0 × 10⁻⁶/°C | - | | **Specific Heat Capacity** | 450 J/kg·K | 20°C | | **Electrical Resistivity** | 85 μΩ·cm | 20°C | | **Modulus of Elasticity** | 155 GPa | 20°C | | **Thermal Shock Resistance** | Excellent | - | --- #### **3. Mechanical Properties** | Property | Solution Treated Pipe | Precipitation Hardened Pipe | | :--- | :--- | :--- | | **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 | | **Burst Pressure** | Schedule dependent | Schedule dependent | --- #### **4. Product Specifications & Applications** **Pipe Configurations:** - **Seamless Pipe:** Maximum integrity for high-pressure applications - **Welded Pipe:** Cost-effective solution for standard applications - **Size Range:** 1/8" to 8" NB (6mm to 200mm) - **Wall Thickness:** Schedule 5S to Schedule 80 - **Lengths:** Standard random lengths, custom cut lengths available **Primary Applications:** * **Aerospace & Defense:** - Aircraft hydraulic systems - Missile fuel management systems - Satellite propulsion systems - Avionics cooling circuits * **Semiconductor Industry:** - Ultra-pure chemical delivery systems - Process gas distribution lines - Vacuum chamber components - Wafer processing equipment * **Energy Sector:** - Nuclear instrumentation - Thermal management systems - Power generation equipment - Fuel cell components * **Precision Instrumentation:** - Laser cooling systems - Cryogenic transfer lines - Optical instrument plumbing - Laboratory analysis equipment **Specialized Applications:** - High-pressure thermal compensation loops - Precision fluid handling systems - Ultra-high vacuum systems - Chemical processing equipment - Research and development apparatus --- #### **5. International Standards & Specifications** **Global Standards Compliance:** - **ASTM F30:** Standard Specification for Iron-Nickel-Cobalt Alloys - **ASTM B722:** Nickel-Iron-Chromium Alloy Seamless Pipe - **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 **Pipe Specifications:** - **Size Standards:** ASME B36.10M, B36.19M - **Pressure Ratings:** ASME B31.3 compliant - **Tolerances:** ASTM A999/A999M - **Surface Finish:** 0.8 μm Ra maximum (internal) - **End Preparation:** Plain, beveled, or threaded ends **Heat Treatment Specifications:** - **Solution Treatment:** 1650-1700°F (899-927°C) - **Aging Treatment:** 900°F (482°C) for 8 hours - **Quenching:** Rapid air or oil quench - **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 environments - **Good Weldability:** Compatible with standard welding techniques - **Long Service Life:** Maintains properties in extreme conditions **Fabrication Guidelines:** - **Welding:** Use matching filler metals for optimal performance - **Bending:** Minimum bend radius 3x pipe diameter - **Machining:** Excellent machinability in solution treated condition - **Heat Treatment:** Critical for achieving optimal properties - **Testing:** Hydrostatic and pneumatic testing capabilities **Quality Assurance:** - **Chemical Analysis:** Complete material certification - **Non-Destructive Testing:** UT, RT, MT, PT as required - **Dimensional Verification:** Full compliance with specifications - **Pressure Testing:** Hydrostatic and pneumatic tests - **Traceability:** Full material history documentation --- #### **Why Choose Our Alloy 43PH Pipe?** * **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 cutting and machining - End preparation and threading - Heat treatment processing - Non-destructive testing - Comprehensive certification packages **Contact our technical team** for detailed specifications, application engineering support, and material selection guidance. We provide complete solutions for your low expansion, high strength alloy pipe 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 2771 gallon liquid totes Special package is available on request.