Alloy 77，Nilomag 77 Pipe，,E FORU

British Specs:，American Specs: AMS 6519 Bar, Tube, Forging，German Specs:

### **Product Introduction: Alloy 77 / Nilomag 77 Pipe** **Precision Tubing for Specialized Magnetic and Thermal Management Applications** **Alloy 77 Pipe**, commercially known as **Nilomag 77 Pipe**, is a specialized nickel-iron alloy tubing engineered to provide exceptional dimensional stability combined with controlled magnetic properties in piping applications. This advanced material maintains consistent performance in applications requiring specific thermal expansion characteristics along with low magnetic permeability, making it ideal for critical applications in aerospace, telecommunications, and scientific instrumentation where both thermal management and magnetic properties are paramount. --- #### **1. Chemical Composition (Weight %)** | Element | Content (%) | | :--- | :--- | | **Nickel (Ni)** | 76.0 - 78.0 | | **Iron (Fe)** | Balance | | **Manganese (Mn)** | 0.50 max | | **Silicon (Si)** | 0.30 max | | **Carbon (C)** | 0.05 max | | **Chromium (Cr)** | 0.20 max | | **Cobalt (Co)** | 0.50 max | | **Copper (Cu)** | 0.20 max | | **Sulfur (S)** | 0.015 max | | **Phosphorus (P)** | 0.015 max | * **Precision Engineering:** The high nickel content (76-78%) ensures specific magnetic characteristics while maintaining excellent thermal expansion properties for piping applications. --- #### **2. Physical Properties** | Property | Value | | :--- | :--- | | **Density** | 8.75 g/cm³ | | **Melting Point** | 1425°C | | **Thermal Conductivity** | 16.5 W/m·K | | **Mean CTE (20-300°C)** | 10.5-11.5 × 10⁻⁶/°C | | **Specific Heat Capacity** | 440 J/kg·K | | **Electrical Resistivity** | 55 μΩ·cm | | **Curie Temperature** | 450°C | | **Magnetic Permeability** | < 1.05 | --- #### **3. Mechanical Properties** | Property | Seamless Pipe (Annealed) | Welded Pipe (Annealed) | | :--- | :--- | :--- | | **Tensile Strength** | 65-80 ksi (448-552 MPa) | 60-75 ksi (414-517 MPa) | | **Yield Strength (0.2%)** | 35-50 ksi (241-345 MPa) | 30-45 ksi (207-310 MPa) | | **Elongation** | 35-45% | 30-40% | | **Hardness** | HRB 70-80 | HRB 65-75 | | **Burst Pressure** | Schedule dependent | Schedule dependent | --- #### **4. Product Specifications & Applications** **Pipe Configurations:** - **Seamless Pipe:** Maximum integrity for high-performance 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:** * **Telecommunications:** - Microwave waveguide components - RF transmission lines - Antenna system components - Signal processing equipment * **Aerospace & Defense:** - Avionics cooling systems - Radar system plumbing - Satellite communication components - Electronic warfare systems * **Scientific Research:** - Particle accelerator components - Nuclear magnetic resonance systems - Laboratory instrumentation - Research reactor components * **Medical Technology:** - MRI system components - Medical imaging equipment - Diagnostic system plumbing - Therapeutic device components **Specialized Applications:** - Low-magnetic permeability fluid handling systems - Precision vacuum system components - Cryogenic equipment plumbing - High-frequency electronic enclosures - Scientific instrument housings --- #### **5. International Standards & Specifications** **Global Standards Compliance:** - **ASTM B722:** Standard Specification for Nickel-Iron-Chromium Alloy Seamless Pipe - **ASTM B725:** Standard Specification for Welded Nickel and Nickel-Alloy Pipe - **UNS K94760:** Unified Numbering System Designation - **AMS 7724:** Aerospace Material Specification - **MIL-DTL-23488:** Military Specification - **ISO 4950:** High Yield Strength Steel - **DIN 17745:** 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 --- #### **6. Technical Advantages & Processing Characteristics** **Manufacturing Benefits:** - **Controlled Magnetic Properties:** Specifically designed low magnetic permeability - **Excellent Thermal Stability:** Maintains dimensional integrity under thermal cycling - **Superior Corrosion Resistance:** Suitable for various industrial environments - **Good Weldability:** Compatible with standard welding techniques - **Long Service Life:** Maintains properties in demanding service conditions **Fabrication Guidelines:** - **Welding:** Use matching filler metals for optimal performance - **Bending:** Minimum bend radius 3x pipe diameter - **Machining:** Good machinability with proper tooling - **Heat Treatment:** Annealing at 850-950°C recommended - **Testing:** Hydrostatic and pneumatic testing capabilities **Magnetic Performance:** - **Low Permeability:** < 1.05 ensures minimal magnetic interference - **Stable Characteristics:** Consistent magnetic properties across temperature ranges - **Specialized Applications:** Ideal for sensitive electronic and scientific equipment **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 77 Pipe?** * **Premium Quality:** Strict control of chemical composition and microstructure * **Precision Manufacturing:** Excellent dimensional accuracy and surface quality * **Technical Expertise:** Comprehensive application support and 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 specialized alloy pipe requirements, ensuring optimal performance in your most demanding magnetic and thermal management 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 2784 gallon liquid totes Special package is available on request.