The alloy contains 29% chromium and 2% aluminum. Due to this, it shows a remarkable longer time to first pit in comparison to other high-temperature alloys. Also a good weldability with gas tungsten arc welding method (GTAW) under argon with matching filler metals VDM® FM 699 XA is given. 

Metal dusting is a type of corrosion in the range of 400 °C to 800 °C (752 °F to 1,472 °F) in gases containing hydrogen and carbon monoxide with low oxygen content, which leads to the decomposition of metal into carbon and metallic particles. Hot and cold rolled plate, welding wire and rods, forged bars and billets and rolled bars (by VDM Metals) as well as seamless tubes (by Tubacex) were successfully produced.

“We believe that this new material offers a remarkable combination of metal dusting resistance and workability. This combination of properties is extremely important for our customers”, says Dr. Heike Hattendorf, R&D department at VDM Metals and project leader for VDM Alloy 699 XA.