… The Ceweld AA 904LP is used for welding materials of similar chemical composition … ASTM A182, UNS N08904, S31726 Uranus B6, 904L, Z2NCDU25-20,  … AA 904LP … A 5.22: ~385T1-4 … 17633-A: T 20 25 5 Cu N L P M21 2 …