Hastelloy C-276: Versatile Corrosion-Resistant Alloy

Hastelloy C-276 (UNS N10276) is a nickel-chromium-molybdenum wrought alloy that stands out as one of the most versatile corrosion-resistant materials available. Its exceptional properties make it suitable for a wide range of applications, especially in aggressive chemical environments. Let’s dive into the key features, techniques, and industrial uses of this remarkable alloy.

2. Characteristics:

Corrosion Resistance:
Hastelloy C-276 exhibits outstanding resistance to both oxidizing and reducing chemicals.
It protects against pitting, crevice attack, and stress corrosion cracking.
Notably, it resists wet chloride gas, hypochlorite, and chlorine dioxide solutions.
Excellent performance in oxidizing salts (such as ferric and cupric chlorides) further enhances its versatility.
Mechanical Strength:
In the aged condition, Hastelloy C-276 has almost double the strength of “C-type” alloys without compromising its corrosion resistance or impact toughness.

3. Techniques:
Formability and Castability:
Available in various forms, including plate, sheet, strip, billet, bar, wire, pipe, tube, and castings.
Excellent formability and castability facilitate its use in diverse applications.
Suitable Applications:
Ideal for equipment and components exposed to sour environments in oil and gas production.
Commonly used in hangers, packers, valve stems, tubulars, downhole equipment, Christmas trees, and oil country tubular goods.

4. Industries and Applications:
Oil & Gas Industry:
Hangers, packers, valve stems, and tubulars in wellhead equipment.
Downhole tools, Christmas trees, and side pocket mandrels.
Chemical and Petrochemical Processes:
Organic chloride processes.
Processes utilizing halide or acid catalysts.
Other Fields:
Pulp and paper industry (digesters and bleach areas).
Flue gas desulfurization (scrubbers and ducting).
Pharmaceutical and food processing equipment.
Remember, Hastelloy C-276’s exceptional corrosion resistance and mechanical strength position it as a reliable choice for critical applications across various industries.