ASTM B865 UNS N05500 Nickel Alloy Rod

ASTM B865 UNS N05500 Nickel Alloy Rod
ASTM B865 UNS N05500 bar is a high-strength, precipitation-hardenable nickel-copper alloy bar (Monel K-500) with excellent corrosion resistance, especially in seawater, and is non-magnetic. It is suitable for high-precision applications such as marine, oil and gas, pump shafts, impellers, valve components, and non-magnetic tools. The material is strengthened by adding aluminum and titanium, followed by heat treatment to form a precipitate.
What is the difference between Monel 400 and Monel 500?
Monel K500 is a nickel-copper alloy with aluminum and titanium added for corrosion resistance and strength. Monel 400, on the other hand, is a nickel-copper alloy without the aluminum and titanium additions, which provide corrosion resistance and ease of machining.

Monel K500 Bar Equivalent Grades
|
STANDARD |
WERKSTOFF NR. |
UNS |
|---|---|---|
|
Monel K500 |
2.4375 |
N05500 |
Monel K500 Bar Mechanical Properties
|
Density |
Melting Point |
Tensile Strength |
Yield Strength (0.2%Offset) |
Elongation |
|---|---|---|---|---|
|
8.44 g/cm3 |
1350 °C (2460 °F) |
Psi – 160000 , MPa – 1100 |
Psi – 115000 , MPa – 790 |
20 % |
Monel K500 Round Bar Chemical Composition
|
Grade |
Ni |
Fe |
C |
Mn |
Si |
Cu |
Al |
S |
Ti |
|---|---|---|---|---|---|---|---|---|---|
|
Monel K500 |
63.0 min |
0.5 – 2 |
0.25 max |
1.5 max |
0.5 max |
27.0 – 33.0 |
2.3 – 3.15 |
0.010 max |
0.35 – 0.85 |
Alloy K500 Round Bar Specification
| Specification | ASTM B 865 / ASME SB 865 / AMS 4676 / QQ N 286, ASTM B865 UNS N04405 |
|---|---|
| Grade | Monel K500 - UNS N04405 |
| Monel K500 Bar Stock size (Round) | Diameter: 3-~800mm |
| Monel K500 Flat bar size | Thickness: 2 -100mm |
| Width: 10 to 500mm | |
| Monel K500 Hex Bar size | 2-100mm A/F |
| Monel K500 Angle bar size | 3mm*20mm*20mm~12mm*100mm*100mm |
| Monel K500 Square bar size | 4 to 100mm |
| Section | 3.0 to 12.0mm thickness |
| Monel K500 Channel Bar | 80 x 40mm to 150 x 75mm section; 5.0 to 6.0mm thickness |
| Monel K500 Billet Size | 1/2" to 495mm Diameter |
| Monel K500 Hollow Bar | 32mm OD x 16mm ID to 250mm OD x 201mm ID) |
| Monel K500 Rectangles Size | 33 x 30mm to 295 x 1066mm |
| Monel K500 Round Bar Standard Dimensions | Diameter / Height: |
| Finish | centreless ground, Cold (bright) drawn, smooth turned, hot rolled, slit rolled edge, peeled, Rough Turned, Bright, hot rolled annealed, Grinding, Polish, Centreless Ground & Black |
| Surface | Hot Rolled Pickled, Bright, Sand Blasting Finished, Cold Drawn, Hairline, Polished |
| Tolerance | H8, H9, H10, H11, H12, H13K9, K10, K11, K12 or as per clients' requirements |
| Technique | Monel K500 Cold Drawn, Hot Rolled, Forged Round Bar, Cold Rolled, Rod |
| Condition | Hardened & tempered, annealed |
| Processing | Bar cutting to 650mm |
ASTM B865 Monel Bar Condition
| H&T | Hardened and tempered |
| ANN | Annealed |
| PH | Precipitation hardened |
Alloy K500 Bar Surface finish
| CD | Cold drawn | P | Polished |
| BD | Bright drawn | SRE | Slit rolled edge |
| CG | Centreless ground | HF | Hot finished |
| CF | Cold finished | HRAP | Hot rolled annealed and pickled |
| P&T | Peeled and turned | RT | Rough turned/peeled |
| ST | Smooth turned | PR | Peeled and reeled |
Mechanical Properties (Aged Condition)
Tensile Strength: Approximately 896-1310 MPa.
Yield Strength: Approximately 586-827 MPa.
Elongation: 30-20%.
Heat Treatment
Heating the alloy at 595-620°C (1100-1150°F) for several hours causes precipitation hardening, forming fine, dispersed Ni₃(Al,Ti) precipitates that enhance the alloy's strength.
Applications
Marine Industry: Due to its high strength and low corrosion resistance in high-velocity seawater, it is used in the manufacture of pump shafts, impellers, and propeller shafts.
Oil and Gas: Suitable for valve components, bolts, and oil well drill collars.
High-Precision Equipment: Due to its low magnetic permeability and stability, it can be used in the manufacture of non-magnetic tools and electronic components.
Other Applications: It is also found in chemical processing, offshore drilling towers, and high-precision equipment such as gyroscopes.

Gnee Steel specializes in the production and sale of various nickel-based alloys, including Nickel 201, Nickel 202, Hastelloy C-276, Hastelloy C-22, Hastelloy B, Hastelloy C-4, Inconel Alloy 600, Inconel 625, Inconel 718, Inconel X-750, Incoloy Alloy 800, Incoloy 800H/HT, Incoloy 825, Monel Alloy 400, Monel K500, and high-temperature alloys. Gnee Steel's products are widely used in aerospace, chemical, electric power, automotive, and nuclear energy applications. We also offer customized alloy solutions tailored to customer needs. For alloy pricing inquiries or customized alloy solutions, please contact us for a quote at ss@gneesteel.com.





