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Monel 400 is a solid-solution alloy primarily composed of nickel and copper, offering excellent resistance to seawater, steam, and acidic or alkaline solutions. It exhibits exceptional mechanical properties over a wide range of temperatures and maintains its strength in both high and sub-zero conditions. Monel 400 is widely used in marine engineering, chemical processing, and heat exchanger applications due to its outstanding corrosion resistance and durability.
Monel K500 is a precipitation-hardened version of Monel 400, strengthened by the addition of aluminum and titanium. This alloy combines the excellent corrosion resistance of Monel 400 with significantly increased strength and hardness. Monel K500 retains its toughness over a wide temperature range and performs exceptionally well in marine and chemical environments. It is ideal for applications such as pump shafts, valves, fasteners, and oil & gas equipment.
| Product | Grades |
|---|---|
| Monel | ASTM B164 Monel 400, ASTM B865 Monel K500 |
| Pipes | B165, B725 |
| Tubes | B165 |
| Pipe Fitting | B366 |
| Forged Fitting | B564 |
| Flanges | B564 |
| Grade | Ni (%) | Cu (%) | Fe (%) | Mn (%) | C (%) | Si (%) | Al (%) | Ti (%) | S (%) |
|---|---|---|---|---|---|---|---|---|---|
| Monel 400 | 63.0 min | 28.0 – 34.0 | 2.5 max | 2.0 max | 0.30 max | 0.50 max | - | - | 0.024 max |
| Monel K500 | 63.0 min | 27.0 – 33.0 | 2.0 max | 1.5 max | 0.25 max | 0.50 max | 2.3 – 3.15 | 0.35 – 0.85 | 0.010 max |
| Grade | Tensile Strength (MPa) | Yield Strength 0.2% Proof (MPa) | Elongation (%) | Hardness (Rockwell B) |
|---|---|---|---|---|
| Monel 400 | 550 – 620 | 240 – 345 | ≥ 35 | 65 – 75 |
| Monel K500 | 965 min | 655 min | 20 – 35 | 96 – 102 (Rockwell B) / 28 – 35 (Rockwell C) |
Monel alloys, including Monel 400 and Monel K500, are known for their outstanding resistance to seawater, acids, and alkalis, combined with excellent toughness and strength across a wide range of temperatures. They are widely used in marine, chemical, aerospace, and oil & gas industries where corrosion resistance is critical.
Used for propeller shafts, seawater valves, and pumps due to excellent resistance to seawater corrosion.
Ideal for equipment handling hydrofluoric acid, alkalis, and other corrosive chemicals.
Used in offshore drilling tools, valves, and pipelines exposed to sour gas and seawater.
Applied in hull fastenings, seawater intake systems, and condenser tubing.
Used in steam generators, heat exchangers, and condenser tubing for its high-temperature strength.
Used in aircraft components and fasteners where high strength and corrosion resistance are required.