Allegheny Ludlum Type 201LN (AL 201LN) is a modification of Type 201 developed especially for cryogenic service to -195 deg C (-320 deg F) to handle industrial gases. Its strength and corrosion resistance also allow other applications. This datasheet provides information on composition, physical properties, and tensile properties as well as fracture toughness. It also includes information on low temperature performance and corrosion resistance as well as forming. Filing Code: SS-1000. Producer or source: Allegheny Ludlum.