Special Metals has launched a new product, Inconel alloy 22, to extend its range of nickel-base alloys for applications in very corrosive industrial environments. Inconel 22 is a nickel-base alloy containing 21.5% chromium, 13.6% molybdenum and 3% tungsten. The material is a modified version of Inconel alloy 622, whose composition has been optimised to provide corrosion resistance in a wide range of both oxidising and reducing acid media. The product has been renamed Inconel alloy 22 to match the industry’s common designation alloy 22. Inconel alloy 22 is identified by UNS Number 06022 and Werkstoff Number 2.4602 and is supplied to the ASTM/ASME specifications B/SB 564, 574, 575, 619, 622 and 626. Special Metals has recently been approved to produce Inconel Alloy 22 to VdTUV Werkstoffblatt 479. Thus, it can be used for pressure vessels and critical applications incorporating VdTUV design for temperatures to 400C. The approval is for all plate, sheet, strip, bar and seamless tube products. The approved welding consumables for GMAW and GTAW are also available through Special Metals Welding Products.
