Monel Alloy K500 is a precipitation hardening nickel copper alloy that retains the excellent corrosion resistance of Alloy 400 with the added advantage of increased strength and hardness values that can be maintained up to 650ºC. It is widely used in marine environments due to its excellent corrosion resistance, and is often utilised in high-velocity seawater and in stagnant or slow-moving seawater.
Alloy K500 offers an exceptionally high dimensional stability and, as with Alloy 400, its low temperature mechanical properties are very good with no transition temperature, making the alloy suitable for many cryogenic applications. It does, however, have a greater tendency toward stress-corrosion cracking in some environments when in the age-hardened condition, although it displays resistance in a sour-gas environment.
SPECIFICATION OF MONEL K500:
• UNS N05500
CHARACTERISTICS OF MONEL K500:
• Good corrosion resistance in marine environments
• Good resistance to non-oxidising acids, alkali and salts
• High retention of properties at elevated temperatures
CHEMICAL COMPOSITION OF MONEL K500:
|
Ni
|
Cu
|
Al
|
Ti
|
C
|
Mn
|
Fe
|
S
|
Si
|
|---|---|---|---|---|---|---|---|---|
|
63.0-70.0
|
Remainder
|
2.30-3.15
|
.35-.85
|
.25 max
|
1.5 max
|
2.0 max
|
.01 max
|
.50 max
|
MECHANICAL PROPERTIES OF MONEL K500:
| Ultimate Tensile Strength (N/mm2) | Proof Strees (N/mm²) | Elongation(%) | Hardness (HB) |
| 970-1000 | 690-760 | 15-20 | 27-35 HRC |