||Allegheny Ludlum AL 904 L™ Alloy (UNS N08904) is an austenitic stainless steel alloy designed for a middles to high level of corrosion resistance. The alloy is produced to low carbon levels for use in the welded condition as in welded vessels and other large and complex fabrications.
The high nickel (25%) and molybdenum (4.5%) contents of the AL 904L alloy provide good resistance to chloride stress corrosion cracking, although not total resistance as judged by the extremely severe laboratory test, boiling magnesium chloride.
The N08904 alloy has been incorporated in ASTM and ASME specifications, and is widely and readily available in a variety of product forms, welding electrodes, and fittings. The AL 904L Alloy has performed well in a variety of service environments such as utility scrubbers, acid and fertilizer production.
Information provided by Allegheny Ludlum Corporation.
||DIN 1.4539; ASTM B-625; ASME SB-625