Alloy 77，Nilomag 77 ，,E FORU

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

### **Product Introduction: Alloy 77 / Nilomag 77** **Premium Nickel-Iron Alloy for Precision Magnetic and Thermal Applications** **Alloy 77** (commercially known as **Nilomag 77**) is a specialized nickel-iron alloy specifically engineered to provide a unique combination of controlled thermal expansion characteristics and specific magnetic properties. This advanced material offers excellent performance in applications requiring precise dimensional stability along with controlled magnetic permeability, making it ideal for electronic components, precision instruments, and specialized industrial applications. --- #### **1. Chemical Composition (Weight %)** | Element | Content (%) | Control Significance | | :--- | :--- | :--- | | **Nickel (Ni)** | 76.0 - 78.0 | Primary property control | | **Iron (Fe)** | Balance | Matrix formation | | **Manganese (Mn)** | 0.50 max | Deoxidation control | | **Silicon (Si)** | 0.30 max | Deoxidation agent | | **Carbon (C)** | 0.05 max | Magnetic properties | | **Chromium (Cr)** | 0.20 max | Surface stability | | **Cobalt (Co)** | 0.50 max | Magnetic characteristics | | **Copper (Cu)** | 0.20 max | Minor alloying element | | **Sulfur (S)** | 0.015 max | Hot workability | | **Phosphorus (P)** | 0.015 max | Ductility preservation | * **Precision Engineering:** The high nickel content (76-78%) ensures specific magnetic characteristics while maintaining excellent thermal expansion properties for precision applications. --- #### **2. Physical Properties** | Property | Value | Condition | | :--- | :--- | :--- | | **Density** | 8.75 g/cm³ | 20°C | | **Melting Point** | 1425°C | Approximate | | **Thermal Conductivity** | 16.5 W/m·K | 20°C | | **Mean CTE (20-300°C)** | 10.5-11.5 × 10⁻⁶/°C | - | | **Specific Heat Capacity** | 440 J/kg·K | 20°C | | **Electrical Resistivity** | 55 μΩ·cm | 20°C | | **Curie Temperature** | 450°C | - | | **Magnetic Permeability** | < 1.05 | Annealed condition | --- #### **3. Mechanical Properties** | Property | Annealed Condition | Hard Temper Condition | | :--- | :--- | :--- | | **Tensile Strength** | 65-80 ksi (448-552 MPa) | 95-115 ksi (655-793 MPa) | | **Yield Strength (0.2%)** | 35-50 ksi (241-345 MPa) | 85-105 ksi (586-724 MPa) | | **Elongation** | 35-45% | 10-20% | | **Hardness** | HRB 70-80 | HRB 90-100 | | **Modulus of Elasticity** | 24 × 10⁶ psi (165 GPa) | 24 × 10⁶ psi (165 GPa) | --- #### **4. Product Specifications & Applications** **Available Product Forms:** - Sheet and Strip: 0.001" to 0.125" thickness - Plate: 0.126" to 2.000" thickness - Bar and Rod: 0.125" to 6.000" diameter - Wire: 0.005" to 0.250" diameter - Custom Components and Fabricated Parts **Primary Applications:** * **Electronics & Telecommunications:** - Microwave tube components - Waveguide assemblies - RF shielding applications - Electronic package seals * **Precision Instrumentation:** - Magnetic shielding components - Instrument frames and structures - Precision measurement devices - Optical system mounts * **Aerospace & Defense:** - Avionics components - Radar system parts - Guidance system elements - Satellite components * **Industrial Applications:** - Sealing applications - Glass-to-metal seals - Transformer cores - Specialized electrical components **Specialized Applications:** - Cryogenic equipment components - Vacuum tube parts - Medical imaging equipment - Research apparatus - Magnetic recording heads --- #### **5. International Standards & Specifications** **Global Standards Compliance:** - **ASTM F30:** Standard Specification for Iron-Nickel-Cobalt 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 & Testing Standards:** - **ASTM A34:** Practice for Magnetic Testing - **ASTM E228:** Test Method for Linear Thermal Expansion - **ASTM E8:** Tension Testing of Metallic Materials - **ASTM E18:** Rockwell Hardness Testing --- #### **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 **Processing Guidelines:** - **Heat Treatment:** Annealing at 850-950°C recommended for optimal properties - **Machining:** Use sharp tools with positive rake angles - **Forming:** Good cold working characteristics in annealed condition - **Cleaning:** Standard industrial cleaning methods applicable **Magnetic Characteristics:** - **Low Magnetic Permeability:** < 1.05 in annealed condition - **Controlled Saturation Induction:** Specific magnetic saturation properties - **Stable Magnetic Properties:** Consistent performance across temperature ranges - **Specialized Applications:** Suitable for specific magnetic circuit designs **Quality Assurance:** - **Chemical Analysis:** Complete material certification - **Mechanical Testing:** Verification of all specified properties - **Magnetic Testing:** Validation of magnetic characteristics - **Dimensional Inspection:** Precision measurement capabilities - **Traceability:** Full material history documentation --- #### **Why Choose Alloy 77 (Nilomag 77)?** * **Proven Reliability:** Extensive track record in critical applications * **Consistent Performance:** Reliable magnetic and thermal properties * **Manufacturing Versatility:** Available in multiple product forms * **Technical Support:** Comprehensive application engineering assistance * **Quality Commitment:** Stringent quality control and certification * **Global Availability:** Worldwide distribution network **Industry Certifications:** - ISO 9001:2015 Quality Management System - AS9100 Aerospace Quality System - NADCAP accredited testing capabilities - OHSAS 18001 Health and Safety Management **Contact our technical team** for comprehensive technical data sheets, application assistance, and material selection guidance. Our experts are ready to provide solutions for your most demanding magnetic and thermal management alloy requirements.

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 2781 gallon liquid totes Special package is available on request.