Hastelloy X

Hastelloy X

Hastelloy X is a nickel-chromium-iron-molybdenum superalloy with outstanding high temperature strength, oxidation resistance, and fabricability. Alloy X’s oxidation resistance is excellent up to 2200° F. This nickel steel alloy has also been found to be exceptionally resistant to stress-corrosion cracking in petrochemical applications. Matrix stiffening provided by the molybdenum content results in high strength in a solid-solution alloy having good fabrication characteristics. Although this nickel alloy is primarily noted for heat and oxidation resistance it also has good resistance to chloride stress-corrosion cracking, carburization, and excellent resistance to reducing or carburizing atmospheres. Two common conditions that often lead to early failure in high temperature alloys, carburization and nitriding, Hastelloy X resists. Hastelloy-X

In what form is Hastelloy X Available at Micrometals

    • Sheet
    • Plate
    • Bar

Chemical Composition, %

Ni Mo Cr Fe W Co Mn C
Remainder 8.0-10.0 20.5-23.0 17.0-20.0 .2-1.0 .5-2.5 1.0 max .05-.15
P S Si Al Ti B Cu
.04 max .03 max 1.0 max .50 max .15 max .01 max .50 max

ASTM Specifications

Sheet/Plate Bar
B435 B572

Mechanical Properties

Representative Tensile Properties, sheet

Temp° F Tensile (psi) .2% Yield (psi) Elongation in 2�h %
70 110,600 54,900 44
1000 89,000 35,600 49
1200 83,000 35,400 54
1400 67,000 34,400 53
1600 45,000 28,200 58