Alloy UNS N05500 Round Bar with High-Strength, Corrosion-Resistant
UNS K500 round bar is a premium-grade nickel-copper alloy known for
its exceptional combination of strength, toughness, and corrosion
resistance. Engineered to withstand extreme environments, Monel
K500 is an ideal material for critical applications across the
marine, chemical, oil & gas, and aerospace industries. Its superior
mechanical properties and resistance to seawater and sour gas make
it a preferred choice for engineers and manufacturers seeking
reliability and performance.
What is Monel K500 (UNS N05500)?
Monel K500 (UNS N05500) is a precipitation-hardened version of
Monel 400. It is primarily composed of nickel (around 63%) and
copper (approximately 30%), with additions of aluminum and
titanium. These elements enable the alloy to undergo age hardening,
significantly increasing its tensile and yield strength compared to
its predecessor, Monel 400, while maintaining excellent corrosion
resistance.
Key Features of Monel K500 (UNS N05500) Round Bar
Superior Strength: Through age-hardening treatment, Monel K500 round bars exhibit
higher mechanical strength and hardness than non-hardened nickel
alloys.
Excellent Corrosion Resistance: Particularly resistant to seawater, salt spray, and a wide range of
acidic and alkaline environments, making it ideal for marine and
chemical processing applications.
Non-Magnetic: In the annealed condition, Monel K500 is non-magnetic and remains
so even at sub-zero temperatures, which is crucial for applications
requiring minimal magnetic interference.
Outstanding Wear Resistance: The addition of aluminum and titanium also enhances the alloy’s
wear and erosion resistance, making it suitable for high-friction
environments.
Long-Term Stability: Maintains mechanical integrity and corrosion resistance over long
operational periods, even under harsh environmental conditions.
Applications of Monel K500 (UNS N05500) Round Bar
Monel K500 round bars are used in a wide variety of
high-performance and high-pressure environments, including:
Marine Engineering: Propeller shafts, pump shafts, and seawater valve components
Oil & Gas Industry: Drill collars, valve components, and instruments exposed to sour
gas
Chemical Processing: Equipment for handling sulfuric acid and hydrofluoric acid
Aerospace: Engine components, fasteners, and structural parts requiring
strength and corrosion resistance
Nuclear Applications: Components exposed to radioactive and corrosive environments
Chemical Composition:
| Element | Ni | Cu | C | Mn | Fe | S | Si | Al | Ti |
| Minimum(%) | 63 | 27 | - | - | - | - | - | 2.3 | 0.35 |
| Max(%) | - | 33 | 0.25 | 1.5 | 2.0 | 0.01 | 0.5 | 3.15 | 0.85 |
Heat Treatment of Finished Products:
| According to the condition provided by DINGSCO | Type | Approximate Operating Temperature | Time (hours) | Cooling |
| °C | °F |
| Annealed | Age Hardening | 580 – 590 | 1075 – 1095 | 8 – 10 | Air |
| Elastic Tempered | Age Hardening | 530 – 540 | 985 – 1005 | 4 – 6 | Air |
Magnetic Characteristics of MONEL alloy K-500:
| Condition | Tensile Strength, ksi | Permeabilitya | Curie Temperature, °F for Permeability of |
| 1.01 | 1.02 | 1.05 | 1.1 |
| Annealed, Quenched | 92.5 | 1.0011 | -210 | -210 | - | - |
| Annealed, Age-Hardened | 151.0 | 1.0018 | -153 | -178 | -202 | -210 |
| Cold-Drawn 20% | 137.0 | 1.0011 | -210 | - | - | - |
| Cold-Drawn 20% and AgeHardened | 186.5 | 1.0019 | -130 | -150 | -182 | -210 |
| Cold-Drawn 50% | 151.3 | 1.0010 | -210 | - | - | - |
| Cold-Drawn 50% and AgeHardened | 198.0 | 1.0019 | -130 | -150 | -182 | -210 |
