Nickelvac 400 UNS N04400 Nickel Superalloy,AMS 4675, 4730. ASTM B 127, B 164, B 564,E FORU

### **Product Introduction: Nickelvac® 400 (UNS N04400) Nickel-Copper Alloy** **Nickelvac 400** is a solid-solution strengthened nickel-copper alloy renowned for its excellent corrosion resistance in a wide range of corrosive environments. This versatile alloy offers exceptional performance in both reducing and oxidizing conditions, demonstrating particular resistance to seawater, hydrofluoric acid, alkaline solutions, and various salts. With its combination of good mechanical properties, fabricability, and thermal stability, Nickelvac 400 serves as a reliable material choice for demanding applications across marine, chemical processing, and aerospace industries. The alloy maintains good strength and toughness from cryogenic temperatures up to approximately 480°C (900°F), making it suitable for diverse temperature applications while providing excellent resistance to stress corrosion cracking and pitting. --- #### **1. Chemical Composition (Weight %)** The typical chemical composition of Nickelvac 400 per AMS 4675 and ASTM standards is as follows: | Element | Content (%) | Element | Content (%) | |---------|-------------|---------|-------------| | **Nickel (Ni)** | 63.0 - 70.0 | **Iron (Fe)** | 2.5 max | | **Copper (Cu)** | 28.0 - 34.0 | **Manganese (Mn)** | 2.0 max | | **Carbon (C)** | 0.3 max | **Silicon (Si)** | 0.5 max | | **Sulfur (S)** | 0.024 max | **Other Elements** | 0.5 max | --- #### **2. Physical & Mechanical Properties** **Physical Properties:** | Property | Metric Units | Imperial Units | |----------|-----------------|------| | **Density** | 8.80 g/cm³ | 0.318 lb/in³ | | **Melting Range** | 1300 - 1350 °C | 2370 - 2460 °F | | **Thermal Conductivity** | 21.8 W/m·K | 151 Btu·in/hr·ft²·°F | | **Coefficient of Thermal Expansion** | 13.9 μm/m·°C | 7.7 μin/in·°F | | **Modulus of Elasticity** | 179 GPa | 26.0 x 10⁶ psi | | **Electrical Resistivity** | 0.51 μΩ·m | - | **Mechanical Properties (Typical at Room Temperature):** | Property | Value (Typical) | |----------|-----------------| | **Tensile Strength** | 550 MPa (80 ksi) | | **Yield Strength (0.2% Offset)** | 240 MPa (35 ksi) | | **Elongation** | 40% | | **Hardness (Rockwell B)** | 65 - 85 HRB | --- #### **3. Key Characteristics & Product Applications** **Key Characteristics:** - **Excellent Corrosion Resistance**: Outstanding performance in seawater, hydrofluoric acid, alkaline solutions, and various chemical environments - **Good Mechanical Properties**: Balanced combination of strength and ductility across a wide temperature range - **Superior Fabricability**: Excellent weldability and formability using conventional methods - **Thermal Stability**: Maintains properties from cryogenic temperatures up to 480°C (900°F) - **Resistance to Stress Corrosion Cracking**: Performs well in chloride-containing environments - **Magnetic Properties**: Essentially non-magnetic below Curie temperature **Product Applications:** Nickelvac 400 finds extensive use across multiple industries: - **Marine Engineering**: - Shipbuilding components and seawater piping systems - Heat exchangers and condensers - Pump shafts and valve trim - Marine fixtures and fasteners - **Chemical Processing**: - Process vessels and reaction kettles - Hydrofluoric acid production equipment - Alkaline handling systems - Chemical storage and transportation - **Aerospace & Defense**: - Aircraft fuel and hydraulic line components - Engine cooling system parts - Fasteners and structural components - AMS 4675 and AMS 4730 compliant applications - **Oil & Gas Industry**: - Downhole instrumentation - Wellhead components - Process piping in corrosive service - Heat exchanger tubing - **Power Generation**: - Feedwater heater tubing - Condenser tubes and plates - Nuclear power plant components --- #### **4. International Standards & Specifications** Nickelvac 400 is covered by numerous international standards: **Aerospace Material Specifications (AMS):** - **AMS 4675**: Screw Machine Stock, Bars and Wire - **AMS 4730**: Bars, Forgings, and Rings **ASTM Standards:** - **ASTM B127**: Plate, Sheet, and Strip - **ASTM B164**: Rod, Bar, and Wire - **ASTM B564**: Forgings **Other International Standards:** - **UNS**: N04400 - **ASME**: SB-127, SB-164, SB-564 - **EN**: NW 4400 (Nicu 30 Fe) - **ISO**: 6208 (NW 4400) - **DIN**: 2.4360 - **JIS**: NW 4400 --- #### **Summary of Key Advantages** - **Versatile Corrosion Resistance**: Excellent performance across diverse corrosive media including acids, alkalis, and salts - **Proven Reliability**: Long service history in demanding marine and chemical environments - **Broad Temperature Capability**: Suitable for cryogenic to elevated temperature applications - **Excellent Fabricability**: Easy to weld, form, and machine using standard techniques - **Comprehensive Standardization**: Widely recognized and specified across international standards - **Cost-Effective Performance**: Provides reliable corrosion resistance at competitive cost **Technical Note**: Nickelvac 400 can be readily welded using common processes such as GTAW, GMAW, and SMAW with matching filler metals. The alloy work hardens during cold forming operations, requiring intermediate annealing for severe deformations. It maintains good mechanical properties at cryogenic temperatures while offering excellent resistance to chloride-induced stress corrosion cracking.

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 3150 gallon liquid totes Special package is available on request.