Alloy 77，Nilomag 77 Forgings，,E FORU

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

### **Product Datasheet: Alloy 77 / Nilomag 77 Forgings** **Alloy 77** (also known under the trade name **Nilomag 77**) is a high-performance nickel-chromium-iron alloy celebrated for its exceptional resistance to oxidation, carburization, and thermal fatigue. **Alloy 77 Forgings** are components manufactured through the controlled process of hot forging, which refines the alloy's grain structure to deliver superior mechanical properties, directional strength, and enhanced structural integrity compared to cast components. This makes them the ultimate choice for the most critical and heavily loaded applications in high-temperature environments. This datasheet outlines the specifications and advantages of forged components made from Alloy 77. --- #### **1. Chemical Composition (Typical % by Weight)** The composition of the forging stock is meticulously controlled to ensure optimal forgeability and final performance. | Element | Content (%) | | :--- | :--- | | Nickel (Ni) | Balance (~76.0 min) | | Chromium (Cr) | 14.0 - 17.0 | | Iron (Fe) | 6.0 - 10.0 | | Manganese (Mn) | 1.0 max | | Copper (Cu) | 0.20 max | | Silicon (Si) | 0.20 - 0.60 | | Carbon (C) | 0.10 max | | Sulfur (S) | 0.015 max | --- #### **2. Key Physical & Mechanical Properties** The forging process imparts a fine, uniform grain flow, resulting in enhanced strength, particularly in terms of fatigue and creep resistance. **Physical Properties:** * **Density:** 8.26 g/cm³ (0.298 lb/in³) * **Melting Range:** ~1371°C - 1427°C (~2500°F - 2600°F) * **Thermal Conductivity:** 12.5 W/m·K (at 100°C) * **Mean Coefficient of Thermal Expansion (20-1000°C):** 16.0 x 10⁻⁶ /K **Mechanical Properties (Typical for Annealed Forgings):** * **Tensile Strength:** 550 - 690 MPa (80 - 100 ksi) * **Yield Strength (0.2% Offset):** 240 MPa min (35 ksi min) * **Elongation (% in 2 inches):** 30% min * **Reduction of Area:** 30% min * **Hardness (Rockwell B):** 65 - 85 HRB *Note: Properties can be tailored through specific heat treatment cycles following the forging process.* --- #### **3. Product Applications** Alloy 77 Forgings are specified for components that demand the highest levels of reliability, strength, and resistance to degradation under stress at elevated temperatures. * **Industrial Furnace Components:** Forged rollers, beams, rails, and fan shafts for continuous furnace operation. * **Heat Treatment Fixtures:** Heavy-duty baskets, grids, and trays for carburizing and sintering processes. * **Valve Bodies and Fittings:** For high-temperature service in chemical processing and power generation. * **Turbine and Engine Components:** Non-aerospace parts such as rings, discs, and shafts for auxiliary power units and land-based turbines. * **Petrochemical Reactor Parts:** Internals and supports for reactors operating in high-temperature, corrosive environments. * **Forged Flanges and Pipe Spools:** For critical connections in high-temperature and high-pressure piping systems. --- #### **4. International Standards & Specifications** Alloy 77 Forgings are produced in accordance with major international standards governing wrought nickel-alloy forgings. | Standard | Title | UNS Number | | :--- | :--- | :--- | | **ASTM B564 / ASME SB564** | Specification for Nickel Alloy Forgings | **N06003** | | **ASTM B166 / ASME SB166** | Specification for Nickel-Chromium-Iron Alloy (Rod/Bar) | **N06003** | | **DIN 17742** | Wrought Nickel and Nickel Alloys | **2.4631** | | **EN 10095** | Heat resisting steels and nickel alloys | **NiCr15Fe** (Similar) | *The ASTM B564 / ASME SB564 is the primary governing specification for nickel-alloy forgings.* --- #### **5. Key Advantages of Alloy 77 Forgings** * **Superior Mechanical Properties:** The forged grain structure provides enhanced tensile strength, toughness, and fatigue resistance compared to cast or fabricated alternatives. * **Directional Strength:** Grain flow can be oriented to follow the primary stress paths of the component, maximizing its load-bearing capability. * **Enhanced Structural Integrity:** The forging process eliminates internal voids, porosity, and segregation common in castings, resulting in greater reliability and longer service life. * **Excellent High-Temperature Capability:** Maintains high strength and resists oxidation, carburization, and thermal cycling in continuous service up to 1150°C (2100°F). * **Proven Reliability:** Ideal for safety-critical applications where component failure is not an option, ensuring operational safety and reduced downtime. **Conclusion:** Alloy 77 (Nilomag 77) Forgings represent the pinnacle of performance and reliability for heavy-duty components in extreme thermal environments. By combining the inherent advantages of the alloy with the superior properties imparted by the forging process, they offer an unmatched solution for engineers seeking to maximize equipment lifespan and operational integrity in the most demanding applications. --- **For detailed information on available forging sizes, shapes, heat treatment options, and non-destructive testing services, please consult our forging engineering specialists.**

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 2790 gallon liquid totes Special package is available on request.