(PS11008)Use of higher-alloyed metallic materials and duplex steels for transport tanks of dangerous goods

摘要

Compatibility evaluations of selected metallic materials under the influence of dangerous goods are published in the BAM-List – Requirements for Tanks for the Transport of Dangerous Goods” as basis for substance-related prototype approvals for tank containers designed for the carriage of dangerous goods. There is a request of the tank manufacturing industry and transportation companies to incorporate additional materials into the BAM-List, especially corrosion-resistant materials because of the large number of corrosive dangerous goods. One solution to solve corrosion problems is to line the tank with a polymer, an alternative solution is the application of high-alloyed stainless steels and nickel-based alloys as there are 1.4529 (X1NiCrMoCu 25-20-7, alloy 926), 1.4562 (X1NiCrMoCu32-28-7, alloy 31) and 2.4605 (NiCr23Mo16AI, alloy 59). There is an interest to use cost-efficient steels with high strength values and concomitant adequate corrosion resistance such as duplex steel 1.4362 (X2CrNiN23-4). This steel grade was originally developed as a substitute for the austenitic grades 1.4404 (X2CrNiMo17-12-2) and 1.4571 (X6CrNiMoTi17-12-2). Due to the lower content of the alloy elements nickel and molybdenum this duplex steel is a cost-efficient alternative to molybdenum containing austenite.