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| Specification | Value |
|---|---|
| UNS Number | N08800 |
| ASTM/ASME Standard | ASTM B564 / SB-564 |
| Tensile Strength | 520 MPa min |
| Yield Strength | 205 MPa min |
| Density | 7.94 g/cm³ |
| Max Service Temperature | 1100°C |
| Element | Composition (%) |
|---|---|
| Ni | 30.0–35.0 |
| Cr | 19.0–23.0 |
| Fe | bal |
| C | ≤0.10 |
| Al | 0.15–0.60 |
| Ti | 0.15–0.60 |
| Mn | ≤1.5 |
| Si | ≤1.0 |
Incoloy 800 Fasteners derive their exceptional performance from a balanced composition of nickel, chromium and iron, with nickel content around 30-35% providing structural stability and resistance to chloride stress corrosion cracking. Chromium levels near 19-23% form a protective oxide layer that enhances oxidation and corrosion resistance, while controlled additions of aluminum and titanium promote grain stability at elevated temperatures. This carefully engineered alloying strategy ensures the fasteners maintain metallurgical integrity across a wide temperature range without excessive carbide precipitation or embrittlement.
These compositional characteristics translate into outstanding engineering benefits, including superior resistance to oxidation, carburization and sulfidation in high-temperature environments. The alloy exhibits excellent mechanical strength retention up to 1100°C, along with strong resistance to stress corrosion cracking in chloride-bearing and caustic media. Combined with good weldability and dimensional stability, Incoloy 800 fasteners are highly suitable for demanding applications in heat exchangers, furnace components and chemical processing equipment requiring long-term reliability.
Specifications
Incoloy 800 Fasteners are high-performance nickel-iron-chromium components defined by precise dimensional specifications, mechanical properties, and technical data for demanding service conditions. Their strength, corrosion resistance, and heat stability support reliable fastening where consistent performance and applicable industry requirements are essential.
| Property | Value |
|---|---|
| Tensile Strength | 520 MPa min |
| Yield Strength (0.2% Offset) | 205 MPa min |
| Elongation | 30% min |
| Hardness | ≤ 90 HRB |
| Modulus of Elasticity | 196 GPa |
| Thermal Expansion (20-100°C) | 14.4 x10⁻⁶/°C |
| Thermal Conductivity | 11.5 W/m·K |
| Density | 7.94 g/cm³ |
| Melting Range | 1357-1385°C |
| Max Service Temperature | 1100°C |
| Standard Type | Details |
|---|---|
| Bolt Standard | ASME B18.2.1, DIN 931/933 |
| Stud Bolt Standard | ASME B16.5, 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/Fine |
| Diameter Range | M6 - M64 / 1/4" - 2.5" |
| Length Range | 10mm - 500mm |
| Available Product Forms | Bolts, Studs, Nuts, Washers, Screws |
| Custom Sizes | Available on request |
| Inspection Standards | EN 10204 3.1, NACE MR0175 |
Applications
