Monel® K-500
Monel K-500 is a precipitation-hardenable nickel-copper alloy. It combines the excellent corrosion resistance characteristic of Monel 400 with the added advantages of greater strength and hardness, achieved through the addition of aluminum and titanium and a controlled heat treatment cycle.
- Common Forms: Round Bar, Shafting, Rod, Forgings, Wire.
- Key Feature: High strength (approx. 3x the yield strength of Monel 400).
- Special Property: Non-magnetic, even at temperatures as low as -200°F.
- Condition: Typically supplied in the age-hardened condition.
Select Monel K-500 when you need the corrosion resistance of the standard nickel-copper alloy but require significantly higher mechanical properties. Its unique combination of high strength, corrosion resistance, and non-magnetic properties makes it ideal for demanding applications.
High Strength & Hardness
Through age-hardening, K-500 achieves yield strengths up to 110 ksi (compared to ~30 ksi for annealed Monel 400), making it suitable for heavy-duty shafts.
Corrosion Resistance
Maintains virtually the same outstanding resistance as Monel 400 to sea water, sour gas environments, and various chemical process streams.
Non-Magnetic
Remains non-magnetic down to cryogenic temperatures, a critical property for electronic housing and specialized oilfield survey instruments.
| Element | Content (%) |
|---|---|
| Nickel (Ni) | 63.0 min |
| Copper (Cu) | 27.0 - 33.0 |
| Aluminum (Al) | 2.30 - 3.15 |
| Titanium (Ti) | 0.35 - 0.85 |
| Iron (Fe) | 2.0 max |
| Manganese (Mn) | 1.5 max |
| Carbon (C) | 0.18 max |
*Note: The additions of Aluminum and Titanium are what allow this alloy to be age-hardened.
| Product Form | ASTM / ASME Standards |
|---|---|
| Bar, Rod, Wire | ASTM B865, ASME SB865 (Supersedes B164 for K-500) |
| Forgings | ASTM B564, ASME SB564 |
| Pipe & Tube (Seamless) | ASTM B163 (Condenser Tubes), ASTM B165 |
| Property | Typical Values (Room Temp) |
|---|---|
| Tensile Strength | 140 - 190 ksi (965 - 1310 MPa) |
| Yield Strength (0.2% Offset) | 100 - 160 ksi (690 - 1100 MPa) |
| Elongation | 30 - 20 % |
| Hardness (Rockwell C) | 27 - 38 HRC |
*Note: Properties shown are for material in the fully age-hardened condition, which provides maximum strength.
Marine Propeller Shafts
Used for high-performance boat shafts requiring high fatigue strength and seawater corrosion resistance.
Oil & Gas Drilling
Non-magnetic drill collars, safety lifts, and valve components for sour gas (H2S) service.
Pump & Valve Trim
Impellers, pump shafts, and valve stems handling corrosive liquids where high wear resistance is needed.
Springs & Fasteners
High-strength springs and fasteners that must operate in corrosive environments without failing.
Need High-Strength Monel K-500?
We specialize in Monel K-500 shafting and bar stock. Contact our metallurgists today for pricing and heat treatment options.
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