Microstructure
Alloy K-500 is derived from the MONEL nickel-copper composition by adding aluminum and titanium. It retains a face-centered cubic (FCC) structure. During age-hardening, a submicroscopic gamma prime (Ni₃Al) phase is formed throughout the matrix, significantly enhancing its strength and hardness.
Characteristics
Excellent corrosion resistance in a wide range of natural and chemical environments.
High resistance to chloride-ion stress-corrosion cracking.
2 to 3 times higher mechanical properties than Monel 400 after age-hardening.
High tensile strength up to approximately 650°C.
Good corrosion fatigue resistance, making it ideal for marine applications.
Low magnetic permeability and remains non-magnetic down to -135°C.
Corrosion Resistance
Similar corrosion resistance to Alloy 400, with excellent performance in environments ranging from pure water to mineral acids, salts, and alkalis.
Virtually immune to chloride-ion stress-corrosion cracking.
May be susceptible to stress-corrosion cracking in aerated hydrofluoric acid vapor under high stress.
Good resistance in high-velocity seawater and marine atmospheres, though pitting may occur in slow-moving or stagnant seawater.
Excellent resistance in sour-gas environments, making it suitable for oil and gas applications.
Applications
Alloy K-500 is widely used in the marine, chemical, petrochemical, and shipbuilding industries due to its strength and corrosion resistance. Common applications include:
- Marine components – Valve seals, pump sleeves, and wear rings for high strength and seawater resistance.
- Industrial tools – Doctor blades and scrapers.
- Fasteners – Bolts used in marine atmospheres and tidal waters, offering high resistance to chloride environments.
- Towing cables – Armor for towing cables, providing high strength, non-magnetic properties, and seawater resistance.
- Oil and gas drilling – Non-magnetic drill collars, valves, and instrumentation sleeves for resistance to chloride-containing media and sour-gas environments.
- Springs – Corrosion-resistant springs for various industrial applications.
- Aerospace components – Aviation instruments requiring non-magnetic properties.
We have products:
Alloy K500 / UNS N05500 Nickel Alloy Tube For Oil And Gas Industry; Alloy 556 / UNS R30556 Nickel Alloy Seamless Tube For Boiler; ASTM B725 / ASME SB725 Alloy K500 / UNS N05500 Nickel Alloy Welded Tube; ASTM B622 / B619 Alloy G-30 / UNS N06030 Nickel Alloy Pipe; Alloy K500 / UNS N05500 Nickel Alloy Pipe For Oil And Gas Industry; PN150 ASTM A366 Alloy K500 / UNS N05500 Nickel Alloy Socket Welding Flange; Alloy K500 / UNS N05500 ASTM B163 / B165 Seamless Nickel Alloy Tube With Eddy Current;