AL-6XN is a type of weldable stainless steel that consists of an alloy of nickel, chromium molybdenum with other trace elements such as nitrogen. The high nickel and molybdenum contents of the AL-6XN alloy give it good resistance to chloride and stress-corrosion cracking. This metal is commonly used instead of 300 series stainless steels in high temperature and low pH applications. AL-6XN will better resist corrosion while still offering the beneficial properties of stainless steel.