Nickel and nickel alloys · Alloy 400L / UNS N04402 / 2.4361
Nickel Alloy 400L (UNS N04402): Engineering Guide
Technical Specifications of Alloy 400L
| Product Type | Alloy Name | Main Specifications | Main Specifications | |
|---|---|---|---|---|
| Wire | Alloy 400L, VDM Alloy 400 L, Nicorros LC, UNS N04402 | ASTM | ASME | DIN |
| Wire | Alloy 400L, VDM Alloy 400 L, Nicorros LC, UNS N04402 | B127, B163-165, B829, B366, B564, B725, B730 | SB-127, SB-163-165, SB-366, SB-564, SB-725, SB-730, SB-751, SB-775, SB-829 | 17743, 17750-17754 |
| Wire | Alloy 400L, VDM Alloy 400 L, Nicorros LC, UNS N04402 | B127, B163-165, B829, B366, B564, B725, B730 | SB-127, SB-163-165, SB-366, SB-564, SB-725, SB-730, SB-751, SB-775, SB-829 | 17743, 17750-17754 |
Composition of Alloy 400 L (mass %)
| Ni | 64 |
|---|---|
| C | <0.04 |
| Mn | 1 |
| Fe | 1.5 |
| Cu | 32 |
Mechanical properties of Alloy 400 L at ambient conditions
| Tensile Strength | Yield Strength (0.2% offset) | Elongation, min. |
|---|---|---|
| 80 ksi | 35 ksi | 40% |
| 550 MPa | 240 MPa | 40% |
Key physical constants of Alloy 400L
The density of the nickel alloy 400L is 8.8 g/cm³.
| Melting Point, °C | Specific Heat Capacity, J/kg · °C | Curie Temperature, °C | Thermal Conductivity, W/m·K | Electrical Resistivity, µOhm·cm | Coefficient of Thermal Expansion, 10⁻⁶/K | Modulus of Elasticity, kN/mm² | Formability | Weldability |
|---|---|---|---|---|---|---|---|---|
| 1300–1500 | 430 | 20–50 | 26 | 51.3 | 15.8 | 182 | Excellent | Good |
Alloy 400L is a low-carbon version of the classic nickel-copper alloy, designed for operation in extremely corrosive environments. Its chemical inertness is evident in contact with hydrofluoric (HF) and sulfuric (H2SO4) acids, highly concentrated alkaline solutions, and in marine climate conditions. The limited carbon content (<0.04%) minimizes carbide precipitation at grain boundaries during welding, which ensures excellent resistance to intergranular corrosion, especially in neutral and alkaline salt environments.
EV Group China technologies confirm the expediency of using Alloy 400L for critically important components operating under high pressure and at temperatures up to 425 °C. The material retains its strength characteristics and structural stability up to 550 °C, demonstrating a complete lack of susceptibility to stress corrosion cracking (SCC). Its unique resistance makes it an alternative-free choice for systems working with fluorine, hydrogen fluoride, and hydrofluoric acid. Key areas of application: marine and offshore engineering, oil refining and chemical synthesis, production of heavily loaded heat exchangers, steam generators, as well as pump and valve components for aggressive media.