Alloy K-500, UNS N05500
| Alloy K-500 ( UNS NO5500 ) |
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| Summary | A precipitation-hardenable nickel-copper alloy that combines the corrosion resistance of alloy 400 with greater strength and hardness. It also has low permeability and is nonmagnetic to temperatures as lowas -101°. Used for pump shafts,oil-well tools and instruments,doctor blads and scrapers,springs,value rim,fasteners,and marine propeller shafts. | |||||||
| Standard Product Forms |
Pipe,tube,sheet,strip,plate,round bar,flat bar,forging stock,hexagon and wire. | |||||||
| Chemical Composition Wt,% |
Min. | Max. | Min. | Max. | Min. | |||
| Ni | 63.0 | Cu | 27.0 | 33.0 | C | 0.18 | ||
| Cr | Co | Si | 0.5 | |||||
| Fe | 2.0 | Al | 2.3 | 3.15 | P | |||
| Mo | Ti | 0.35 | 0.85 | S | 0.01 | |||
| W | Mn | 1.5 | N | |||||
| Physical Constants |
Density,g/cm3:8.44 | |||||||
| Melting Range, °C 1315-1350 |
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| Typical Mechanical Properties |
(Precipitation Hardened) Tensile Strength,ksi 160 Mpa 1100 Yield Strength (0.2% Offset),ksi 115 Mpa 790 Elongation,% 20 |
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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;