Corrosion Resistant Monel K-500
The corrosion resistance of alloy K-500 is substantially equivalent to that of alloy 400 except that when in the age-hardened condition, nickel alloy K-500 has a greater tendency toward stress-corrosion cracking in some environments. Monel K-500 has been found to be resistant to a sour-gas environment. The combination of very low corrosion rates in high-velocity sear water and high strength make alloy K-500 particularly suitable for shafts of centrifugal pumps in marine service. In stagnant or slow-moving sea water, fouling may occur followed by pitting but this pitting slows down after a fairly rapid initial attack.
What are the characteristics of Monel K500?
Excellent resistance to high velocity sea water
Resistant to a sour-gas environment
Chemical Composition, %
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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
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Product Form |
Condition |
Tensile (ksi) |
.2% Yield (ksi) |
Elongation % |
Hardness |
Rod & Bar |
Hot-Finished/Aged |
140-190 |
100-150 |
30-20 |
27-38 HRC |
Rod & Bar |
Hot Finished/Annealed |
90-110 |
40-60 |
45-25 |
75-90 HRB |
Rod & Bar |
Hot Finished/Annealed/Aged |
130-165 |
85-120 |
35-20 |
24-35 HRC |
Rod & Bar |
Cold-Drawn/Aged |
135-185 |
95-160 |
30-15 |
25-41 HRC |
Rod & Bar |
Cold-Drawn/Annealed/Aged |
130-190 |
85-120 |
30-20 |
24-35 HRC |