About

Hastelloy bolts are nickel-based superalloy fasteners designed for extreme corrosion resistance and high-temperature performance. The most common gradesHastelloy C276 and Hastelloy C22are widely used in chemical processing, pollution control, marine, and aerospace industries due to their ability to withstand aggressive oxidizing and reducing environments.

Key Specifications of Hastelloy Fasteners

• Material Grades:
• Hastelloy C276 (UNS N10276, DIN 2.4819): Nickel ~55%, Molybdenum ~15%, Chromium ~14.5%, Iron, Tungsten.
• Hastelloy C22 (UNS N06022, DIN 2.4602): Nickel ~56%, Molybdenum ~13%, Chromium ~22%, Iron.
• Mechanical Properties (C276):
• Tensile Strength: 8501600 MPa
• Yield Strength: ~355 MPa
• Hardness: ~200 HB
• Corrosion Resistance:
• Excellent resistance to chlorides, strong oxidizers, reducing agents, and mixed chemical environments.
• Superior protection against pitting, crevice corrosion, and stress corrosion cracking.
• Standards: ASTM B574 (bars), ASTM B564 (forgings), ASTM B366 (fittings), ASTM F467/F468 (fasteners).

Common Uses of Hastelloy Bolts

• Chemical Processing Plants: Reactors, heat exchangers, pumps, and piping exposed to aggressive chemicals.
• Pollution Control Equipment: Scrubbers, stack liners, and fans handling hot acidic gases.
• Marine Industry: Offshore platforms, seawater piping, and subsea equipment.
• Aerospace & Power Generation: Gas turbines, combustion chambers, and high-temperature fasteners.
• Pharmaceutical & Food Industry: Equipment requiring resistance to sterilizing chemicals.

Comparison: Hastelloy C276 vs Hastelloy C22

Why Choose Hastelloy Bolts?

• Versatility: Performs in both oxidizing and reducing environments.
• Durability: Long service life in aggressive chemical and marine conditions.
• High Strength: Withstands mechanical stress at elevated temperatures.
• Reliability: Preferred for critical applications where stainless steel or even Duplex alloys fail.