AL-6XN® / UNS N08367 is a low carbon, high purity, nitrogen-bearing super-austenitic stainless alloy. It was designed to be a seawater resistant material and has since been demonstrated to be resistant to a broad range of corrosive environments.
The high strength and corrosion resistance make it a better choice than the conventional duplex stainless steels and a cost effective alternative to more expensive nickel-base alloys where excellent formability, weldability, strength and corrosion resistance are essential.
The levels of chromium, molybdenum and nitrogen in AL-6XN all serve to provide resistance to acidic oxidizing chloride solutions previously achieved only by the nickel base alloys, and high nickel (24%) and molybdenum (6.3%) contents make AL-6XN an excellent solution to chloride ion stress corrosion cracking. Because of its nitrogen content AL-6XN features greater tensile strength than common austenitic stainless, while retaining high ductility and impact strength. ASME allowable stresses are up to 75% higher than for 316L stainless, and more than twice those for the copper-nickel alloys.