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

British Specs:，American Specs:，German Specs:

### **Product Introduction: Alloy 43PH / Low Expansion 43PH Alloy Rod** **Precipitation-Hardenable Rod Stock for High-Strength Precision Applications** **Alloy 43PH Rod** is a specialized iron-nickel-cobalt precipitation-hardenable alloy rod engineered to deliver exceptional dimensional stability combined with high mechanical strength. This premium rod stock maintains excellent low thermal expansion characteristics while achieving superior strength properties through controlled precipitation hardening heat treatment, making it ideal for structural components requiring both thermal stability and mechanical reliability. --- #### **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 Composition:** The precise balance of nickel and cobalt ensures controlled thermal expansion, while titanium and aluminum enable precipitation hardening for enhanced mechanical properties in rod 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 | | **Curie Temperature** | 250°C | - | --- #### **3. Mechanical Properties** | Property | Solution Treated | Precipitation Hardened | | :--- | :--- | :--- | | **Tensile Strength** | 85-105 ksi (586-724 MPa) | 185-225 ksi (1276-1551 MPa) | | **Yield Strength (0.2%)** | 50-70 ksi (345-483 MPa) | 175-205 ksi (1207-1413 MPa) | | **Elongation** | 25-35% | 8-12% | | **Reduction of Area** | 50-60% | 20-30% | | **Hardness** | HRB 90-100 | HRC 40-46 | | **Impact Toughness** | 45-65 ft-lb | 25-40 ft-lb | --- #### **4. Product Specifications & Applications** **Rod Specifications:** - **Diameter Range:** 0.125" to 6.000" (3.175 mm to 152.4 mm) - **Diameter Tolerance:** ±0.001" to ±0.005" (size dependent) - **Length:** Standard 12-foot rods, custom lengths available - **Straightness:** 0.010" per foot maximum - **Surface Finish:** 32 μin RMS or better - **Condition:** Solution treated or precipitation hardened **Primary Applications:** * **Aerospace Components:** - Aircraft structural rods - Missile guidance system shafts - Satellite structural members - Avionics mounting rods * **Precision Instrumentation:** - Laser system mounting rods - Optical bench components - Measuring machine structures - Precision guide rods * **Semiconductor Equipment:** - Wafer handling system shafts - Vacuum chamber components - Etching equipment rods - Inspection system mounts * **Industrial Applications:** - High-strength fasteners - Turbine components - Nuclear instrument rods - Thermal management shafts **Specialized Applications:** - Cryogenic equipment rods - High-temperature fixtures - Optical alignment structures - Medical device components - Research apparatus shafts --- #### **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 **Heat Treatment Specifications:** - **Solution Treatment:** 1650-1700°F (899-927°C) / 1 hour per inch - **Aging Treatment:** 900°F (482°C) for 8 hours, air cool - **Quenching:** Rapid air or oil quench - **Atmosphere Control:** Protective atmosphere recommended --- #### **6. Technical Advantages & Processing Characteristics** **Manufacturing Benefits:** - **High Strength-to-Weight Ratio:** Superior mechanical properties - **Excellent Thermal Stability:** Maintains dimensions under thermal cycling - **Good Machinability:** Best in solution treated condition - **Weldability:** Compatible with standard welding techniques - **Corrosion Resistance:** Good performance in most environments **Machining Characteristics:** - **Turning:** 60-80 SFM with carbide tools - **Drilling:** 30-40 SFM with high-speed steel drills - **Milling:** 70-90 SFM with sharp cutters - **Threading:** Suitable for precision threads - **Surface Finish:** Excellent finish achievable **Heat Treatment Guidelines:** - **Solution Treating:** Achieves optimal condition for machining - **Precipitation Hardening:** Develops high strength properties - **Aging Control:** Critical for property development - **Distortion Control:** Minimal during heat treatment **Quality Assurance:** - **Chemical Analysis:** Complete material certification - **Mechanical Testing:** Verification of all properties - **Ultrasonic Testing:** Available for critical applications - **Heat Treatment Verification:** Full documentation - **Traceability:** Complete material history --- #### **Why Choose Our Alloy 43PH Rod?** * **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 traceability with certified documentation * **Global Compliance:** Meets international standards and specifications * **Proven Reliability:** Extensive track record in critical applications **Value-Added Services:** - Precision cutting to specified lengths - Centerless grinding for tight tolerances - Heat treatment processing - Custom certification packages - Just-in-time delivery programs **Contact our technical team** for specific application requirements and engineering support. We provide complete solutions for your low expansion, high strength alloy rod needs, from material selection through heat treatment recommendations, ensuring optimal performance in your most demanding precision 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 2769 gallon liquid totes Special package is available on request.