Q1: What is Hastelloy C-4 (UNS N06455) mainly used for?
A1: Hastelloy C-4 plates are widely applied in chemical processing, nuclear fuel reprocessing, pharmaceutical manufacturing, and pollution control equipment because of their excellent resistance to strong oxidizing and reducing agents.
Q2: What are the key advantages of Hastelloy C-4 alloy plates?
A2: They provide outstanding resistance to stress corrosion cracking, pitting, and crevice corrosion. In particular, Hastelloy C-4 is known for its exceptional stability against grain boundary precipitation during welding, making it highly reliable in corrosive service.
Q3: How does Hastelloy C-4 compare to other Hastelloy grades like C-22 or C-276?
A3: Hastelloy C-4 offers superior resistance to strong oxidizers such as hot ferric chloride, chlorine, and cupric chloride, while C-22 and C-276 provide broader resistance in mixed chemical environments. C-4 is often preferred in nuclear and highly oxidizing service conditions.
Q4: What standards are covered for Hastelloy C-4 sheets and plates?
A4: Flat products are produced according to ASTM B575 for sheet and plate, and ASTM B619 for welded pipe applications. Materials comply with UNS N06455 designation and can be certified according to EN 10204 3.1/3.2.
Q5: What product forms and customizations are available?
A5: Hastelloy C-4 can be supplied as sheet, plate, and strip, in various thicknesses and dimensions. Customized cutting, surface finishes (2B, BA, polished), and special sizes can be provided to meet project requirements.
