ASTM B127 UNS N04400 Nickel-Copper Alloy Plate and Sheet
Grade: UNS N04400, Monel 400, EN 2.4360, NiCu30Fe
ASTM B127 Nickel-Copper Alloy (UNS N04400) Plate, Sheet, and Strip
Golden Sunbird Metals supplies ASTM B127 UNS N04400 nickel-copper alloy plate and sheet, also known as Monel 400, for demanding marine, chemical, and industrial applications. This nickel-rich alloy offers excellent resistance to seawater corrosion, many acids, salt solutions, and aggressive reducing media, making it a trusted material for service environments where reliability matters. Available in plate, sheet, and strip forms with a thickness range of 1–50 mm, ASTM B127 Monel 400 is widely used in seawater piping systems, offshore equipment, heat exchangers, valves, pumps, desalination plants, and corrosive-fluid handling equipment. Golden Sunbird Metals provides strict quality control, international inspection certificates, and flexible packing options to support global project requirements. With stable mechanical properties and proven corrosion resistance, our ASTM B127 UNS N04400 nickel-copper alloy plate and sheet delivers long-lasting performance for critical applications in marine, oil and gas, and chemical processing industries.
Chemical Composition (wt. %) of ASTM B127 UNS N04400 Nickel-Copper Alloy Plate and Sheet
| Element | Alloy N04400 Composition |
|---|---|
| Nickel (Ni) | min 63.0 |
| Copper (Cu) | 28.0 to 34.0 |
| Iron (Fe) | max 2.5 |
| Manganese (Mn) | max 2.0 |
| Carbon (C) | max 0.3 |
| Silicon (Si) | max 0.5 |
| Sulfur (S) | max 0.024 |
Mechanical Properties of ASTM B127 UNS N04400 Nickel-Copper Plate, Sheet, and Strip (All Thicknesses and Sizes Unless Otherwise Indicated)
| Condition (Temper) | Tensile Strength min (psi [MPa]) | Yield Strength (0.2 % offset) min (psi [MPa]) | Elongation in 2 in. or 50 mm or 4D min % | Rockwell Hardness (B Scale) |
| Hot-Rolled Plate (Annealed) | 70,000 (485) | 28,000 (195) | 35 | – |
| Hot-Rolled Plate (As-rolled) | 75,000 (515) | 40,000 (275) | 25 | – |
| Hot-Rolled Sheet (Annealed) | 70,000 (485) | 28,000 (195) | 35 | – |
| Cold-Rolled Sheet (Annealed) | 70,000 to 85,000 (485 to 585) | 28,000 (195) | 35 | – |
| Cold-Rolled Sheet (Quarter-hard) | – | – | – | 73 to 83 |
| Cold-Rolled Sheet (Half-hard) | 100,000 (690) | 90,000 (620) | 2 | 82 to 90 |
| Cold-Rolled Strip (Annealed) | 70,000 to 85,000 (485 to 585) | 28,000 (195) | 35 | – |
| Cold-Rolled Strip (Skin hard) | – | – | – | 68 to 73 |
| Cold-Rolled Strip (Quarter-hard) | – | – | – | 73 to 83 |
| Cold-Rolled Strip (Half-hard) | – | – | – | 82 to 90 |
| Cold-Rolled Strip (Three-quarter-hard) | – | – | – | 89 to 94 |
| Cold-Rolled Strip (Hard) | 100,000 (690) | 90,000 (620) | 2 | – |
| Cold-Rolled Strip (Spring temper) | – | – | – | 98 min |
- Yield strength requirements do not apply to material under 0.020 in. (0.51 mm) in thickness.
- Rockwell or equivalent hardness conversions see Hardness Conversion Tables E 140. Caution should be observed in using the Rockwell test on thin material as the results may be affected by specimen thickness.
Features
- ASTM B127 nickel-copper alloy plate, sheet, and strip for UNS N04400 (Monel 400).
- Monel 400 is a solid-solution nickel-copper alloy with high strength, toughness, and excellent corrosion resistance over a wide temperature range.
- Excellent resistance to seawater, marine atmospheres, and many chemical environments.
- Strong resistance to hydrofluoric acid and good performance in reducing acids such as sulfuric and hydrochloric acid.
- Available in plate, sheet, and strip forms for fabrication and machining.
Technical Specifications
| Specification | Value |
| Standard | ASTM B 127, ASME SB 127 (Plate, Sheet, and Strip), SAE AMS 4544 (Sheet, Strip, and Plate), DIN 17750 (Plate, Strip and Sheet, BS3072 NA13 (Sheet and Plate), BS3073 NA13 (Strip) |
| Grade | UNS N04400, MONEL 400, EN 2.4360, NiCu30Fe |
| Type | Plate, Sheet, Strip |
| Thickness | 1-50mm |
| Length | 1000 – 12000mm |
| Width | 500 – 2500mm |
| Inspection Certificate | EN 10204 Type 3.1 (Mill Test Certificate), EN 10204 Type 3.2 (Witness Testing or 3rd Party Inspection) |
| Tests | Bend Test (ASTM E290), Impact Test (ASTM E23), Intergranular Corrosion Test (Various ASTM Standards), Specific Corrosion Testing |
Applications
- Marine engineering, seawater service, offshore structures, and desalination systems.
- Chemical processing equipment, process vessels, piping, and transfer systems.
- Pumps, valves, shafts, fasteners, and other corrosion-resistant components.
- Heat exchangers and boiler feedwater heaters.
- Hydrofluoric-acid handling and other reducing-acid service.
- Crude petroleum stills, industrial water systems, and brine service.
