Introduction
Jiwei has introduced a high-temperature and corrosion-resistant level switch known as the Hastelloy Tuning Fork Liquid Level Switch. This document explains the rationale behind choosing Hastelloy C-22 for this application.

Hastelloy Types and Characteristics
Hastelloy is a high-performance alloy primarily composed of nickel. The document outlines several types of Hastelloy, each with unique properties:

• Hastelloy C-276: Known for its corrosion resistance across various aggressive media, with high molybdenum content providing resistance to localized corrosion like pitting.
• Hastelloy C-22: The most versatile Ni-Cr-Mo alloy, offering superior resistance to general and localized corrosion, especially in chloride environments.
• Hastelloy B2: Provides resistance to pure sulfuric acid and several non-oxidizing acids.
• Hastelloy X: Combines oxidation resistance, fabricability, and high-temperature strength, with exceptional resistance to stress-corrosion cracking in petrochemical applications.
• Hastelloy G-30: Offers outstanding resistance to hydrofluoric/nitric acid mixtures.

Advantages of Hastelloy C-22
Hastelloy C-22 is highlighted for its broader range of corrosion resistance in both oxidizing and reducing environments compared to other Hastelloy types and stainless steels. This makes it highly suitable for chemical processing industries.

Decision Rationale
Despite its higher cost, Hastelloy C-22 was chosen for the Fork Liquid Level Switches due to its superior adaptability and anti-corrosion performance, aligning with the common needs of customers and the applications of these switches.