Nickel-copper Alloy N04400
Monel 400 alloy's core characteristics lie in its corrosion resistance, mechanical properties, and processing adaptability, specifically:
1. Outstanding Corrosion Resistance: As a commonly used nickel-copper corrosion-resistant alloy, it can withstand corrosion from seawater, hydrofluoric acid, and sulfuric acid with concentrations below 85%. It is also not easily corroded in high-temperature alkaline solutions, neutral solutions, and the atmosphere, and virtually does not develop stress corrosion cracking. The corrosion rate in high-temperature steam is less than 0.025 mm/a.
2. Good Mechanical and Temperature Adaptability: With a melting point of 1300-1350℃, it can operate stably in a wide temperature range from -184℃ to 600℃, maintaining toughness at low temperatures without the risk of brittle fracture. In the annealed state, its tensile strength is 480-760 MPa, with an elongation of not less than 35%. It only requires cold working to harden, without the need for aging hardening treatment.
3. Excellent Machinability: It can be processed using traditional machining methods, exhibiting good cutting performance; it is compatible with various welding methods such as TIG and MIG, and can be matched with Monel body or ENiCu-7 welding material; when processed at high temperatures, the use of water coolant and the allowance for shrinkage can ensure dimensional accuracy.
4. Stable and Easily Controlled Composition: The core components are nickel ≥63.0% and copper 28.0% - 34.0%, with the content of impurities such as iron and manganese controlled within a low range. The stable composition ratio can reliably guarantee performance in various scenarios.
