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| Specification | Value |
|---|---|
| UNS Number | N06022 |
| ASTM/ASME Standard | ASTM B574 / ASME SB574 |
| Tensile Strength | 760 MPa min |
| Yield Strength | 350 MPa min |
| Density | 8.69 g/cm³ |
| Max Service Temperature | 1093°C |
| Element | Composition (%) |
|---|---|
| Ni | bal |
| Cr | 20.0–22.5 |
| Mo | 12.5–14.5 |
| W | 2.5–3.5 |
| Fe | 2.0–6.0 |
| Co | ≤2.5 |
| Mn | ≤0.50 |
| C | ≤0.015 |
Hastelloy C22 fasteners derive their exceptional performance from a carefully balanced composition of nickel, chromium, molybdenum and tungsten. Chromium provides resistance to oxidizing environments, while molybdenum and tungsten enhance resistance to reducing acids and localized attack such as pitting and crevice corrosion. The low carbon and silicon content minimizes carbide precipitation during welding, preserving corrosion resistance in heat-affected zones. This synergistic alloying makes the material highly versatile across a broad spectrum of corrosive media, distinguishing it from other nickel-based alloys limited to specific chemical environments.
These compositional advantages translate into outstanding engineering benefits for fastener applications. Hastelloy C22 fasteners offer superior resistance to pitting, crevice corrosion, and stress corrosion cracking in both oxidizing and reducing environments, including chlorides and sulfuric acid. Their high strength, excellent fabricability, and stability at elevated temperatures make them ideal for demanding chemical processing, pollution control, and marine applications, ensuring long-term reliability, reduced maintenance costs, and safety under aggressive service conditions.
Specifications
Hastelloy C22 Fasteners are precision-engineered nickel-chromium-molybdenum alloy components defined by strength, hardness, and dimensional tolerances that support demanding service conditions. Their technical data covers sizes, thread forms, and material properties, with compliance to applicable fastener standards where specified, ensuring reliable performance in aggressive environments.
| Property | Value |
|---|---|
| Tensile Strength | 760 MPa min |
| Yield Strength (0.2% Offset) | 350 MPa min |
| Elongation | 45% min |
| Hardness | ≤100 HRB |
| Modulus of Elasticity | 206 GPa |
| Thermal Expansion (20–100°C) | 12.4 µm/m·°C |
| Thermal Conductivity | 10.1 W/m·K |
| Density | 8.69 g/cm³ |
| Melting Range | 1357–1399°C |
| Max Service Temperature | 1093°C |
| Parameter | 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 – M100 / 1/4" – 4" |
| Length Range | 10mm – 500mm |
| Available Forms | Bolts, Studs, Nuts, Washers, Screws |
| Custom Sizes | Available on request |
| Inspection Standards | NACE MR0175, EN 10204 3.1 |
Applications
