INCONEL G-3 Nickel Superalloy (UNS N06985)，1

### **Product Introduction: INCONEL® G-3 (UNS N06985)** **INCONEL® G-3** is a nickel-chromium-iron-molybdenum alloy specifically designed to offer exceptional corrosion resistance in a wide range of severe environments. This advanced superalloy demonstrates superior performance in both oxidizing and reducing media, with particular effectiveness in handling sulfuric acid, phosphoric acid, and other aggressive chemical environments. The alloy's optimized composition provides enhanced resistance to localized corrosion, including pitting and crevice corrosion, while maintaining excellent fabricability and weldability characteristics. --- ### **Chemical Composition** | Element | Content (%) | |---------|-------------| | **Nickel (Ni)** | Balance | | **Chromium (Cr)** | 21.0 - 23.5 | | **Iron (Fe)** | 18.0 - 21.0 | | **Molybdenum (Mo)** | 6.0 - 8.0 | | **Copper (Cu)** | 1.5 - 2.5 | | **Cobalt (Co)** | 5.0 max | | **Tungsten (W)** | 1.5 max | | **Niobium + Tantalum** | 0.50 max | | **Carbon (C)** | 0.015 max | | **Manganese (Mn)** | 1.0 max | | **Silicon (Si)** | 1.0 max | --- ### **Physical Properties** | Property | Value | |----------|-------| | **Density** | 8.31 g/cm³ | | **Melting Point** | 1374 °C | | **Thermal Conductivity** | 10.1 W/m·K (at 20°C) | | **Electrical Resistivity** | 1.18 μΩ·m | | **Modulus of Elasticity** | 206 GPa | | **Coefficient of Thermal Expansion** | 12.8 μm/m·°C (20-100°C) | | **Specific Heat Capacity** | 430 J/kg·K | | **Magnetic Permeability** | <1.001 | --- ### **Mechanical Properties** **Room Temperature Properties (Annealed Condition):** - **Tensile Strength:** 690-790 MPa - **Yield Strength (0.2% Offset):** 310-380 MPa - **Elongation:** 45-55% - **Hardness:** 85-95 HRB **Elevated Temperature Performance:** - **Maximum Service Temperature:** 540°C - **Good creep strength up to 400°C** - **Excellent thermal stability** --- ### **Key Characteristics & Advantages** 1. **Exceptional Corrosion Resistance** - Outstanding resistance to sulfuric and phosphoric acids - Excellent performance in mixed acid environments - Superior resistance to pitting and crevice corrosion 2. **Versatile Environmental Performance** - Handles both oxidizing and reducing conditions - Good resistance to chloride-induced stress corrosion cracking - Excellent performance in acidic salt solutions 3. **Excellent Fabricability** - Good weldability using conventional methods - Suitable for hot and cold working - Good machinability in annealed condition 4. **Enhanced Weldability** - Low susceptibility to carbide precipitation - Maintains corrosion resistance in weld zones - No post-weld heat treatment required --- ### **Product Applications** **Chemical Processing Industry:** - Reactors and pressure vessels - Heat exchangers and condensers - Piping systems and valves - Acid production equipment **Pollution Control:** - Flue gas desulfurization systems - Scrubbers and absorbers - Waste water treatment equipment - Acid waste handling systems **Oil and Gas Industry:** - Downhole components - Production tubing - Process equipment in refineries - Sour service applications **Pharmaceutical Industry:** - Reaction vessels - Processing equipment - Piping and transfer systems --- ### **International Standards** | Standard Type | Standard Number | Product Form | |---------------|-----------------|--------------| | **UNS** | N06985 | Unified Numbering System | | **ASTM** | B582 | Plate, Sheet, and Strip | | **ASTM** | B619/B622 | Welded and Seamless Pipe | | **ASTM** | B574 | Rod and Bar | | **ASME** | SB-582, SB-619 | Code Cases | | **DIN** | 2.4619 | Material Number | | **NACE** | MR-01-75 | Sour Service | --- ### **Summary** **INCONEL G-3 (UNS N06985)** represents a significant advancement in nickel-based corrosion-resistant alloys, offering superior performance in some of the most aggressive chemical environments. Its carefully balanced composition provides exceptional resistance to a wide range of corrosive media, particularly excelling in sulfuric and phosphoric acid applications. The alloy's enhanced resistance to localized corrosion, combined with excellent fabricability and weldability, makes it an ideal choice for critical components in chemical processing, pollution control, and energy industries. Compliance with major international standards including ASTM, ASME, and NACE specifications ensures consistent quality and reliability, providing engineers with a robust material solution for demanding applications where corrosion resistance and long-term performance are paramount.

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 3327 gallon liquid totes Special package is available on request.