AMS 4544 specification covers a corrosion-resistant nickel-copper alloy (Alloy 400 / UNS N04400) in the form of sheet, strip, and plate. Alloy 400 sheet is a nickel-copper alloy with high strength comparable to structural steel and excellent toughness. It exhibits outstanding corrosion resistance in a range of media including seawater, hydrofluoric acid, sulfuric acid, and alkalis. This versatile alloy is widely used in marine engineering, chemical processing, hydrocarbon processing equipment, and heat exchangers .
1. Product Specifications & Physical DataAlloy 400 is available in sheet, strip, and plate forms for marine, chemical, and industrial applications requiring excellent corrosion resistance and good mechanical properties. Available Forms: Sheet, strip, plate . Specifications: AMS 4544, ASTM B127, ASME SB-127, UNS N04400, Werkstoff Nr. 2.4360 .
| Chemical Composition (Weight %) | Alloy 400 Specification |
|---|
| Nickel (Ni) | 63.0 - 70.0 | | Copper (Cu) | 28.0 - 34.0 | | Iron (Fe) | 2.5 max. | | Manganese (Mn) | 2.0 max. | | Silicon (Si) | 0.5 max. | | Carbon (C) | 0.3 max. | | Sulfur (S) | 0.024 max. |
| Physical Properties | Metric | Imperial |
|---|
| Density | 8.80 g/cm³ | 0.318 lb/in³ | | Melting Range | 1300 - 1350°C | 2370 - 2460°F | | Modulus of Elasticity | 179 GPa | 26.0 × 10⁶ psi | | Thermal Conductivity (RT) | 21.8 W/m·K | 151 BTU·in/hr·ft²·°F | | Coefficient of Expansion (20-100°C) | 13.9 µm/m·°C | 7.7 µin/in·°F | | Electrical Resistivity | 0.547 µΩ·m | 0.547 µΩ·m | | Curie Temperature | 20 - 50°C (approx.) | 68 - 122°F |
| Mechanical Properties (Sheet/Plate) | Condition | Metric | Imperial |
|---|
| Tensile Strength (min.) | Annealed | 480 MPa | 70 ksi | | Yield Strength (0.2% offset, min.) | Annealed | 170 MPa | 25 ksi | | Elongation (min.) | Annealed | 35% | 35% | | Hardness (Annealed) | — | 110 HB | 110 HB |
2. Fabrication & Material ComparisonAnnealing: 843-871°C (1550-1600°F) × 10-30 minutes, water quench or air cool; relieves cold work stresses and restores ductility . Hot Working: 927-1177°C (1700-2150°F); reheat as necessary; avoid working below 871°C . Cold Working: Good formability; can be bent, stamped, and drawn; work-hardening rate moderate . Machining: Good machinability; requires sharp tools, positive feeds, and adequate lubrication . Welding: Excellent weldability using GTAW (TIG), GMAW (MIG), and resistance welding; matching filler metal (ERNiCu-7) recommended.
3. ApplicationsMarine Engineering: Seawater tanks, marine sheathing, boat hulls, offshore platform components Chemical Processing: Process vessels, storage tanks, reactor linings, agitator blades, baffle plates Hydrocarbon Processing: Heat exchanger plates, distillation column trays, cladding for refinery equipment Heat Exchangers: Plate-type heat exchangers, gaskets, sealing components HF Acid Service: Alkylation unit components, HF acid storage tanks, handling equipment Pulp & Paper: Processing equipment for sulfate digesters Water Treatment: Fresh and saltwater tanks, desalination plant components Aerospace: Fuel tank linings, structural components
Contact ZYTC Alloy for certified AMS 4544 Alloy 400 sheet, strip, and plate with complete traceability, certificates, and competitive pricing. Available in annealed condition for marine, chemical, and hydrocarbon processing applications. Email:daisy@zytcsteel.com WhatsApp/WeChat: +86 17335753350 |
