What is Alloy 20 used for?
Alloy 20 was developed for its resistance to acidic solutions, which was the primary motivation for its creation. Because acids like sulfuric acid quickly erode austenitic stainless steel, this kind of stainless steel has a problematic past with acids like sulfuric acid. ASTM B473 Alloy 20 Fasteners, in contrast to bolts made of stainless steel of grade 304 or even stainless steel 316, have a resistance to sulfuric acid that is better throughout a range of concentrations.
