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| Property | Value |
|---|---|
| UNS Number | N05500 |
| ASTM/ASME Standard | ASTM B865 / QQ-N-286 |
| Tensile Strength | 1050 MPa (min) |
| Yield Strength | 790 MPa (min) |
| Density | 8.44 g/cm³ |
| Max Service Temperature | 480°C |
| Element | Composition (%) |
|---|---|
| Ni | 63.0–70.0 |
| Cu | 27.0–33.0 |
| Al | 2.30–3.15 |
| Ti | 0.35–0.85 |
| Fe | ≤2.0 |
| Mn | ≤1.5 |
| C | ≤0.25 |
Monel K500 fasteners derive their performance from a nickel-copper base strengthened by controlled additions of aluminium and titanium. These elements enable age-hardening through gamma-prime precipitation, significantly boosting strength while the nickel-copper matrix retains outstanding resistance to seawater, acids and reducing environments. Small amounts of iron and manganese further stabilise the microstructure and improve hot-working characteristics, ensuring consistent fastener quality across production batches.
The resulting alloy delivers exceptional corrosion resistance, high strength-to-weight ratio and excellent performance in marine and chemical processing environments. Its non-magnetic, non-sparking nature makes it ideal for critical fastening applications in offshore, oil and gas, and pump shaft assemblies. Combined with good fatigue resistance and toughness at elevated temperatures, Monel K500 fasteners provide reliable, long-term mechanical integrity in harsh, corrosive service conditions where standard steel fasteners would fail prematurely.
Specifications
Monel K500 Fasteners are defined by their mechanical properties, corrosion-resistant performance, and precise dimensional specifications, with technical data supporting selection for demanding applications. Their specifications balance strength, hardness, and size tolerances, making them suitable where reliable fastener performance and compatibility are essential.
| Property | Value |
|---|---|
| Tensile Strength | 1050 MPa (min) |
| Yield Strength (0.2%) | 790 MPa (min) |
| Elongation | 20% min |
| Hardness | 280–350 HB |
| Modulus of Elasticity | 179 GPa |
| Thermal Expansion (20–100°C) | 13.7 µm/m·°C |
| Thermal Conductivity | 17.5 W/m·K |
| Density | 8.44 g/cm³ |
| Melting Range | 1315–1350°C |
| Heat Treatment | Age-hardened, 590°C |
| Max Service Temperature | 480°C |
| Category | Details |
|---|---|
| Bolt Standard | ASME B18.2.1, DIN 931/933 |
| Stud Bolt Standard | ASME B18.31, MSS SP-75 |
| Nut Standard | ASME B18.2.2, DIN 934 |
| Washer Standard | ASME B18.22.1, DIN 125 |
| Thread Form | UNC, UNF, Metric Coarse |
| Diameter Range | M6–M100 / 1/4"–4" |
| Length Range | 10 mm–500 mm |
| Available Forms | Bolts, Studs, Nuts, Washers, Screws |
| Custom Sizes | Available on request |
| Manufacturing Standard | ASTM B865 |
| Inspection Standard | NACE MR0175, EN 10204 3.1 |
Applications
