ASME SA312 SS 904L Seamless Pipes is superior resistance to sulfuric acid at most concentrations, along with an enhanced resistance over austenitic stainless to erosion corrosion and corrosion fatigue. UNS N08904 Seamless Pipes is being designed to feature resistance to pitting, stress corrosion cracking, high strength, erosion corrosion and corrosion fatigue, crevice corrosion and strong weldability. Referred as WNR 1.4539 Seamless Pipes, we also offer these SUS 904L Seamless Pipes in different sizes and specifications to suit the needs given by our esteemed clients. https://www.chinastainless-steel.com/stainless-steel-pipe/stainless-steel-seamless-pipe/stainless-steel-welded-904-pipe.html