Hastelloy alloys are primarily composed of nickel, molybdenum, chromium,

and other elements like iron, cobalt, and tungsten. Specific alloy grades like Hastelloy C-276, 

Hastelloy C-22, Hastelloy B-2, and Hastelloy B-3 are used for different applications.

The diameter of Hastelloy tubes typically ranges from 6 mm to over 100 mm,

depending on the application requirements. Custom diameters can be produced.

Wall thickness typically ranges from 0.5 mm to several millimeters,

depending on pressure and structural requirements.

Used in critical applications such as chemical reactors, heat exchangers, desalination units,

marine environments, and aerospace. Commonly employed in chemical processing, nuclear power, and gas turbines.

High tensile strength, excellent toughness, and good resistance to fatigue.

Hastelloy tubes maintain their mechanical properties even under high-pressure and high-temperature conditions.

Exceptional resistance to a wide range of corrosive environments, including strong acids

(sulfuric, hydrochloric, and phosphoric acids), seawater, and high-temperature gases. 

Resistant to pitting, crevice corrosion, and stress corrosion cracking.

Excellent performance at high temperatures,

withstanding temperatures up to 1000°C (1832°F) or higher, depending on the specific alloy.

Hastelloy tubes can be hot-rolled, cold-rolled, or extruded to achieve precise dimensions.

They can also be welded, brazed, or joined using various techniques.

Often subject to heat treatment processes such as solution annealing or

stress-relieving to improve their mechanical properties and corrosion resistance.

Hastelloy tubes are weldable using techniques like TIG (Tungsten Inert Gas),

MIG (Metal Inert Gas), and laser welding. 

Welding requires careful control of heat input to maintain material properties.

More expensive than standard carbon steel due to the high cost of nickel,

molybdenum, and other alloying elements used in the composition of Hastelloy alloys.