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| Property | Value |
|---|---|
| UNS Number | N06035 |
| ASTM/ASME Standard | ASTM B462 / ASME SB462 |
| Tensile Strength | ≥ 690 MPa |
| Yield Strength | ≥ 283 MPa |
| Density | 8.1 g/cm³ |
| Max Service Temperature | 1093°C |
| Element | Composition (%) |
|---|---|
| Ni | bal |
| Cr | 33.0–37.0 |
| Mo | 7.6–9.0 |
| W | 1.5–2.5 |
| Fe | ≤2.0 |
| C | ≤0.05 |
| Mn | ≤1.0 |
| Co | ≤2.0 |
Hastelloy G35 fasteners derive their exceptional performance from a nickel-chromium-molybdenum matrix, with high nickel content providing a stable austenitic structure and chromium delivering strong oxidation and acid resistance. Molybdenum additions enhance resistance to pitting and crevice corrosion in chloride-bearing and reducing environments, while controlled iron and cobalt levels improve structural stability. Trace tungsten further reinforces resistance to localized attack, making this alloy particularly effective in aggressive phosphoric acid and wet process environments where conventional stainless fasteners fail prematurely.
These compositional characteristics translate into outstanding engineering benefits for fastener applications, including superior resistance to pitting, crevice corrosion and stress corrosion cracking across a wide temperature range. The alloy retains excellent mechanical strength and ductility at elevated temperatures, ensuring reliable clamping force and joint integrity in demanding industrial systems. Its high corrosion resistance minimizes maintenance cycles, reduces failure risk and extends service life, making Hastelloy G35 fasteners the preferred choice for chemical processing, phosphoric acid production and other severe-service piping and equipment applications.
Specifications
Hastelloy G35 Fasteners deliver a balanced combination of mechanical strength, corrosion resistance, and dimensional precision for demanding industrial service. Their specifications cover material composition, size ranges, thread profiles, and key technical data, while performance is defined by mechanical properties and dimensional tolerances suited to critical applications.
| Property | Value |
|---|---|
| Tensile Strength | 690 MPa min |
| Yield Strength (0.2% Offset) | 283 MPa min |
| Elongation | 40% min |
| Hardness | ≤ 100 HRB |
| Modulus of Elasticity | 205 GPa |
| Thermal Conductivity | 11.1 W/m·K |
| Coefficient of Thermal Expansion | 12.9 µm/m·°C |
| Density | 8.1 g/cm³ |
| Melting Range | 1325–1371°C |
| Maximum Service Temperature | 1093°C |
| Standard | Details |
|---|---|
| Bolt Standard | ASME B18.2.1 |
| Stud Bolt Standard | ASME B16.5 / API 6A |
| Nut Standard | ASME B18.2.2 |
| Washer Standard | ASME B18.22.1 |
| Thread Form | UNC, UNF, Metric Coarse/Fine |
| Diameter Range | M6 – M100 / 1/4" – 4" |
| Length Range | 10mm – 500mm (custom available) |
| Available Product Forms | Bolts, Studs, Nuts, Screws, Washers |
| Custom Sizes | Available on request |
| Manufacturing/Inspection Standards | ASTM B462, EN 10204 3.1/3.2 |
Applications
