A1084 was developed by Subcommittee A01.14 on Methods of Corrosion Testing, part of ASTM International Committee A01 on Steel, Stainless Steel and Related Alloys. 

Appearing on the market around the year 2000, the steels have been developed as alternatives both to more traditional duplex grades as well as duplex substitutions for standard austenitic stainless steels. Currently, users of standard duplex grades have used ASTM A923, Test Methods for Detecting Detrimental Intermetallic Phase in Duplex Austenitic/Ferritic Stainless Steels, in testing lean duplex grades. However, A1084 fills the need for a standard that deals more specifically with lean duplex stainless steels.
“A1084 gives users and producers a tool to check if the product made out of a lean duplex alloy contains deleterious phases originating from improper heat treatment of the product,” said Poul-Erik Arnvig, vice president, global market development, Outokumpu Stainless AB, and an A01 member. “When used, A1084 will give added information and comfort outside existing standard specifications that the material ordered and delivered is free from deleterious amounts of unwanted phases that, if present in significant amounts, often will deteriorate both corrosion resistance and toughness properties of the materials in question.”