Alloy 77，Nilomag 77 Rod，,E FORU

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

### **Product Introduction: Alloy 77 / Nilomag 77 Rod** **Precision Rod Stock for Specialized Magnetic and Thermal Applications** **Alloy 77 Rod**, also known commercially as **Nilomag 77 Rod**, is a premium nickel-iron alloy rod specifically engineered to provide exceptional dimensional stability combined with controlled magnetic properties in rod and bar configurations. This precision-manufactured rod stock offers reliable performance in applications requiring specific thermal expansion characteristics along with low magnetic permeability, making it ideal for precision instruments, electronic components, and specialized industrial applications. --- #### **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 Alloy Control:** The high nickel content (76-78%) ensures specific magnetic characteristics while maintaining excellent thermal expansion properties for precision rod 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 | Annealed Condition | Cold Drawn Condition | | :--- | :--- | :--- | | **Tensile Strength** | 65-80 ksi (448-552 MPa) | 90-110 ksi (621-758 MPa) | | **Yield Strength (0.2%)** | 35-50 ksi (241-345 MPa) | 80-100 ksi (552-690 MPa) | | **Elongation** | 35-45% | 15-25% | | **Reduction of Area** | 60-70% | 40-50% | | **Hardness** | HRB 70-80 | HRB 85-95 | --- #### **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:** Annealed, centerless ground, or cold drawn **Primary Applications:** * **Electronics & Telecommunications:** - Microwave tube components and mounts - Waveguide support rods - RF component shafts - Electronic package structural elements * **Precision Instrumentation:** - Magnetic instrument components - Precision measuring device rods - Optical system mounting rods - Laboratory apparatus shafts * **Aerospace & Defense:** - Avionics component rods - Radar system structural elements - Guidance system shafts - Satellite instrument mounts * **Industrial Applications:** - Sealing application components - Glass-to-metal seal rods - Specialized electrical component shafts - Precision machinery elements **Specialized Rod Applications:** - Cryogenic equipment structural rods - Vacuum system components - Medical imaging equipment parts - Research apparatus shafts - Magnetic device components --- #### **5. International Standards & Specifications** **Global Standards Compliance:** - **ASTM F30:** Standard Specification for Iron-Nickel Alloys - **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 - **JIS C2533:** Japanese Industrial Standard **Quality Specifications:** - **Dimensional Standards:** ASTM A484 compliant - **Surface Quality:** Free of seams, cracks, and inclusions - **Straightness:** Per customer requirements - **Certification:** EN 10204 3.1/3.2 with full traceability --- #### **6. Technical Advantages & Processing Characteristics** **Manufacturing Benefits:** - **Controlled Magnetic Properties:** Specifically designed magnetic characteristics - **Excellent Thermal Stability:** Maintains dimensional accuracy - **Good Machinability:** Suitable for precision manufacturing - **Superior Weldability:** Compatible with standard welding techniques - **Corrosion Resistance:** Good performance in most environments **Machining Characteristics:** - **Turning:** 70-90 SFM with carbide tools - **Drilling:** 40-60 SFM with high-speed steel drills - **Milling:** 80-100 SFM with sharp cutters - **Threading:** Suitable for precision threads - **Surface Finish:** Excellent finish achievable **Heat Treatment:** - **Annealing Temperature:** 850-950°C (1560-1740°F) - **Atmosphere:** Hydrogen or vacuum recommended - **Cooling Rate:** Controlled for optimal properties **Quality Assurance:** - **Chemical Analysis:** Complete material certification - **Mechanical Testing:** Verification of all properties - **Magnetic Testing:** Validation of magnetic characteristics - **Dimensional Inspection:** Precision measurement capabilities - **Traceability:** Complete material history documentation --- #### **Why Choose Our Alloy 77 Rod?** * **Premium Quality:** Strict control of chemical composition and microstructure * **Precision Manufacturing:** Excellent dimensional accuracy and surface quality * **Technical Expertise:** Comprehensive machining and processing support * **Quality Assurance:** Full traceability with certified test reports * **Global Compliance:** Meets international standards and customer 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 specialized alloy rod needs, 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 2782 gallon liquid totes Special package is available on request.