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Hastelloy X (UNS N06002/2.4665) is a nickel-chromium-iron-molybdenum alloy with the addition of cobalt and tungsten, that possesses an exceptional combination of oxidation resistance, formability and high temperature strength. It has also been found to be exceptionally resistant to stress-corrosion cracking. Alloy X exhibits good ductility after prolonged exposure at temperatures of 1200, 1400, 1600 °F for 16,000 hours. It has excellent formability and welding characteristics.
Hastelloy X can be forged and, because of its good ductility, can be cold-worked. It can be welded by both manual and automatic welding methods including shielded metal-arc (coated electrodes), gas tungsten-arc (TIG), and gas metal-arc (MIG). Alloy X can also be resistance-welded.
Grade | C≤ | Mn≤ | P≤ | S≤ | Si≤ | Cr | Mo | Fe | Co≤ | Ni | W |
HastelloyX | 0.05-0.15 | 1.0 | 0.04 | 0.03 | 1.0 | 20.5-23.0 | 8.0-10.0 | 17.0-20.0 | 0.5-2.5 | Remainder | 0.2-1.0 |
Melting point: 1355 °C, 2470 °F
Density: 8.22 g/cm3, 0.297 lb/in³
Mechanical properties | Tensile, min, ksi[MPa] | Yield, min, ksi[MPa] | Elongation, %(min) |
Hastelloy X | 95[655] | 32[240] | 35 |
Hastelloy X Equivalent Grades
STANDARD | WERKSTOFF NR. | UNS |
Hastelloy X | 2.4665 | N06002 |
Hastelloy X Specifications
Metal Type | Bar | Sheet&Plate | Tube&Pipe | Fitting | Forging | Weld Wire | Weld Electrode |
UNS N06002 | ASTM B572 | ASTM B435 | AMS 5587 AMS 5588 ASTM B619 ASTM B622 | ASTM B366 | AMS 5754 GE B50TF31 | A5.14 ERNiCrMo-2 | A5.11 ENiCrMo-2 |
Hastelloy X Application:
Hastelloy X is widely used in various high temperature environments due to its corrosion resistance in various atmospheres at high temperatures and its excellent high temperature strength.
Industrial and aviation steam turbines (combustors, rectifiers, structural covers)
Industrial furnace components, support rolls, grids, ribbons and radiant tubes
Spiral tubes in petrochemical furnaces
High temperature gas cooling nuclear reactor
