UNS N05500 Monel K-500 Forged Flange & Ring Manufacturer: High-Performance Solution for Demanding Applications
UNS N05500 Monel K-500 Forged Rings: A Premium Solution for Corrosive Environments
As a leading manufacturer of high-quality UNS N05500 Monel K-500 forged flanges and rings, we offer durable and reliable solutions for industries requiring exceptional resistance to corrosion, wear, and high temperatures. Monel K-500 is a high-strength, corrosion-resistant alloy made primarily of nickel and copper, with additional elements like aluminum and titanium that enhance its mechanical properties.
What is a forged ring?
A forged ring is a type of ring-shaped metal component that is produced through a forging process, where a metal is heated and shaped under high pressure to form the desired ring shape. Forging is a manufacturing process that improves the material’s strength, durability, and structural integrity by altering its grain structure. This results in a stronger and more reliable component compared to other methods like casting or machining from solid stock.
UNS N05500 Monel K-500 Forging Material Specification
ASTM B865
Standard Specification for Precipitation Hardening Nickel-Copper-Aluminum Alloy (UNS N05500) Bar, Rod, Wire, Forgings, and Forging Stock1
UNS N05500, also known as Monel K-500, is a high-strength, corrosion-resistant alloy primarily composed of nickel and copper. It is widely used in industries where high strength, resistance to seawater corrosion, and durability under high-temperature and high-pressure conditions are required. The material is particularly known for its excellent performance in marine environments, chemical processing, and oil and gas industries.
Material Composition of UNS N05500 Monel K-500 according to ASTM B865
| Element | Composition Limits, % | Product (check) analysis variations, under min or over max, of the specified limit of element, % |
| Nickel^A | 63.0 min | 0.45 |
| Aluminum | 2.30–3.15 | 0.2 |
| Carbon | 0.18 max | 0.01 |
| Iron | 2.0 max | 0.05 |
| Manganese | 1.5 max | 0.04 |
| Silicon | 0.50 max | 0.03 |
| Titanium | 0.35–0.85 | 0.03 min |
| 0.04 max | ||
| Sulfur | 0.010 max | 0.003 |
| Copper | 27.0–33.0 | 0.15 min |
| 0.20 max |
Mechanical Properties Unaged of UNS N05500 Monel K-500 according to ASTM B865
| Mechanical Properties (Forgings) | |||
| Form | Condition | Hardness – Brinell 3000 kg, max | Hardness – Rockwell, max |
| Rounds,^(B) hexagons, squares, rectangles, and forgings | Hot – worked | 245 | C23 |
Mechanical Properties—Age-HardenedA (Bar, Rod, and Forgings) N05500
| Form | Condition | Maximum Section Thickness, in. (mm) | Tensile Strength, min, ksi (MPa) | Yield Strength^(B), 0.2 % offset, min, ksi (MPa) | Elongation^(B) in 2 in. or 4D, min,% | Hardness^(C) – Brinell 3000 kg, min | Hardness^(C) – Rockwell C, min |
| Rounds,^(D) hexagons, squares, rectangles, and forgings^(E) | Hot-worked and age-hardened | All sizes | 140 (965) | 100 (690) | 20 | 265 | 27 |
| Rounds | Cold-worked and age-hardened | ¼ (6.4) to 1 (25.4), incl | 145 (1000) | 110 (760) | 15 | 300 | 32 |
| over 1 (25.4) to 3 (76.2), incl | 140 (965) | 100 (690) | 17 | 280 | 29 | ||
| over 3 (76.2) to 4 (101.6), incl | 135 (930) | 95 (655) | 20 | 255 | 25 | ||
| Hexagons | Cold-worked and age-hardened | ¼ (6.4) to 2 (50.8), incl | 140 (965) | 100 (690) | 15 | 265 | 27 |
| Rounds, hexagons, squares, rectangles, and forgings | Annealed and age-hardened^(F) | Up to 1 (25.4) | 130 (895) | 90 (620) | 20 | 250 | 24 |
| 1 (25.4) and over | 130 (895) | 85 (585) | 20 | 250 | 24 |
Forging Process for UNS N05500 Monel K-500
The forging process for Monel K-500 involves heating the material to temperatures between 2100°F to 2200°F (1149°C to 1204°C) to make it malleable. The material is then shaped using either open-die or closed-die forging methods, depending on the component’s size, shape, and application requirements.
- Heat Treatment: After forging, Monel K-500 is heat-treated to achieve optimal mechanical properties:
- Solution treatment (annealing) is typically done at around 1800°F (982°C) for 1 hour and then water quenched to relieve internal stresses and achieve a uniform structure.
- Monel K-500 is often aged at 1300°F to 1350°F (704°C to 732°C) to develop the precipitation of Ni3(Ti), which significantly increases its strength and hardness.
- Forging Process Considerations:
- Monel K-500 can be forged into rings, flanges, shafts, discs, and other components used in demanding applications.
- The forging process is highly controlled to maintain the material’s integrity and avoid oxidation or degradation of its surface.
- Post-forging processes such as machining, polishing, and additional heat treatment are often performed to meet precise dimensions and surface finish requirements.
Applications of UNS N05500 Monel K-500 Forged Flanges & Rings
- Seawater Handling Systems: Monel K-500 is highly resistant to seawater corrosion, making it ideal for marine applications, including heat exchangers, seawater pumps, and valves.
- Chemical and Petrochemical Processing: Monel K-500’s resistance to harsh chemicals like hydrochloric acid, sulfuric acid, and alkalis makes it perfect for reactors, piping systems, and pressure vessels in chemical processing industries.
- Offshore Oil and Gas: The alloy’s ability to resist high-pressure, high-temperature environments makes it an excellent choice for offshore drilling rigs, pipelines, and other equipment exposed to extreme conditions.
- Aerospace: Monel K-500’s strength and resistance to high-temperature oxidation make it useful in components exposed to high-stress conditions, including fasteners, turbine blades, and structural components in aircraft.
Material Comparison Table,equivalent grade of N05500
| Standard | UNS N05500 | code |
|---|---|---|
| ASTM/ASME | UNS N05500 | ASTM B865 |
| European (EN) | 2.4375 | EN 2.4375 |
| DIN | 2.4375 | DIN 17744, DIN 2.4375 |
| ISO | UNS N05500 | ISO 6362-2 |
| BS (UK) | UNS N05500 | BS 3075 |


UNS N05500 Monel K-500 forged rings provide a combination of high strength, corrosion resistance, and durability in demanding industrial applications. With precise sizing specifications, including outer diameter (OD), inner diameter (ID), thickness, and tolerances, these forged rings can be tailored to meet the specific requirements of various industries such as marine, chemical, oil and gas, and aerospace.


