Here's a professional English product introduction for Hastelloy C-22 (UNS N06022) with application fields:

Hastelloy C-22 is a versatile nickel-chromium-molybdenum-tungsten alloy renowned for its superior corrosion resistance compared to other nickel-based alloys like C276 and 625. With a density of 8.9 g/cm³ and melting point of 1325°C, it maintains exceptional performance in both oxidizing and reducing environments.

Key Features:

• Outstanding resistance to pitting, crevice corrosion, and stress corrosion cracking
• Excellent high-temperature stability up to 1250°C with remarkable oxidation resistance
• Good weldability and fabrication characteristics
• Superior performance in chloride-containing media and mixed acid environments

Primary Applications:
• Chemical Processing: Reactors, heat exchangers, and piping systems handling sulfuric, phosphoric, and hydrochloric acids

• Oil & Gas: Offshore equipment, seawater cooling systems, and subsea pipelines
• Pharmaceutical: Critical equipment for drug manufacturing requiring GMP compliance

• Pollution Control: Flue gas desulfurization systems and waste treatment equipment
• Aerospace: Liquid hydrogen fuel tanks and extreme environment component
• Nuclear Industry: Fuel reprocessing and radioactive waste handling systems

The alloy is available in various forms including plate, sheet, and tube, complying with standards such 

ASTM B57514. Its balanced composition makes Hastelloy C-22 particularly suitable for the most demanding industrial applications where both corrosion resistance and structural integrity are critical.