Hastelloy C-22 is a nickel-molybdenum-chromium-tungsten alloy, designed for exceptional resistance to pitting, crevice corrosion, and stress corrosion cracking in aggressive chemical environments.
Element | Content (%) |
Nickel (Ni) | Balance |
Chromium (Cr) | 20.0 – 22.5 |
Molybdenum (Mo) | 12.5 – 14.5 |
Tungsten (W) | 2.5 – 3.5 |
Iron (Fe) | 2.0 – 6.0 |
Manganese (Mn) | ≤ 1.00 |
Silicon (Si) | ≤ 0.08 |
Carbon (C) | ≤ 0.015 |
Sulfur (S) | ≤ 0.01 |
Cobalt (Co) | ≤ 2.50 |
Property | Value (Typical) | Unit | Condition |
Tensile Strength (Ultimate) | ≥ 700 | MPa | Annealed |
Yield Strength (0.2% Offset) | ≥ 285 | MPa | Annealed |
Elongation (in 50 mm) | ≥ 40 | % | ASTM B575 |
Hardness (Brinell) | ≤ 217 | HB | |
Density | 8.73 | g/cm³ | Room Temp |
Melting Range | 1300 – 1350 | °C | |
Modulus of Elasticity | ~210 | GPa | Room Temp |
Category | Standard Code | Description |
Pipe | ASTM B622 / ASME SB622 | Seamless Hastelloy C-22 pipe |
Tube | ASTM B619 / ASME SB619 | Seamless Hastelloy C-22 heat-exchanger tube |
Fittings | ASTM B366/WPHC22 | Hastelloy C-22 wrought pipe fittings |
