Monel 400 / K500 Round Bars
Monel 400 is a nickel-copper alloy with excellent resistance to seawater, brine, hydrofluoric acid, sulphuric acid and alkalis, combined with good strength and toughness from sub-zero temperatures up to about 550 °C. Monel K500 adds aluminium and titanium to the same base, making it precipitation hardenable to roughly three times the yield strength of Monel 400 while keeping the same corrosion resistance and low magnetic permeability.
Nexforge Alloys manufactures and supplies Monel 400 round bars in the annealed, hot finished or cold drawn condition, and Monel K500 round bars in the age hardened condition, as per ASTM B164 and ASTM B865 respectively. Bars are supplied with mill test certificates and can be cut, chamfered or rough machined to your requirement.
Monel 400 (N04400) and Monel K500 (N05500) round bars from 6 mm to 250 mm diameter, as per ASTM B164 / B865, QQ-N-281 and QQ-N-286.
Monel Round Bar Specification
| Parameter | Details |
|---|---|
| Grades | Monel 400 (UNS N04400, W.Nr. 2.4360), Monel K500 (UNS N05500, W.Nr. 2.4375) |
| Standards | ASTM B164, ASME SB164, ASTM B865, QQ-N-281, QQ-N-286, DIN 17752 |
| Size Range | 6 mm to 250 mm diameter |
| Length | Random 3 to 6 metres, or cut to length |
| Condition | Monel 400: annealed / hot finished / cold drawn; Monel K500: age hardened |
| Surface Finish | Hot rolled pickled, peeled, centreless ground, bright drawn |
| Tolerance | h9 / h10 / h11 or as per drawing |
| Testing | Chemical, tensile, hardness, UT on request |
| Certification | EN 10204 3.1 mill test certificate |
Chemical Composition (% by weight)
| Grade (UNS) | Ni (+Co) | Cu | Fe | Mn | C | Si | S | Al | Ti |
|---|---|---|---|---|---|---|---|---|---|
| Monel 400 (N04400) | 63.0 min | 28.0 - 34.0 | 2.5 max | 2.0 max | 0.30 max | 0.50 max | 0.024 max | - | - |
| Monel K500 (N05500) | 63.0 min | 27.0 - 33.0 | 2.0 max | 1.5 max | 0.25 max | 0.50 max | 0.010 max | 2.30 - 3.15 | 0.35 - 0.85 |
Mechanical Properties
| Grade | Condition | Tensile Strength (min) | 0.2% Yield Strength (min) | Elongation (min) | Hardness (typ.) | Density |
|---|---|---|---|---|---|---|
| Monel 400 | Annealed | 480 MPa (70 ksi) | 170 MPa (25 ksi) | 35 % | 110 - 150 HB | 8.80 g/cm³ |
| Monel 400 | Hot finished | 515 MPa (75 ksi) | 275 MPa (40 ksi) | 30 % | 140 - 190 HB | 8.80 g/cm³ |
| Monel K500 | Age hardened | 965 MPa (140 ksi) | 690 MPa (100 ksi) | 20 % | 27 - 35 HRC | 8.44 g/cm³ |
Values are minimum or typical figures as per the referenced standards and are for guidance only. Please refer to the mill test certificate supplied with the material for actual values.
Key Features
- Excellent resistance to seawater, brackish water and marine atmospheres
- Superior resistance to hydrofluoric acid and fluorine containing media
- Monel K500 combines high strength with low magnetic permeability for non-magnetic tools
- Good mechanical properties from cryogenic temperatures to 550 °C
Applications
- Pump and propeller shafts, marine fasteners and valve trim
- Oil well drill collars, non-magnetic tools and downhole instruments (K500)
- Hydrofluoric acid alkylation and fluorine handling equipment
- Heat exchanger and feed water heater components
- Springs, fasteners and doctor blades in pulp and paper plants