Type HL is an austenitic iron-chromium-nickel alloy similar to ACI Type HK (Alloy Digest SS-303, December 1974); however, the higher chromium content of Type HL gives it greater resistance to corrosion by hot gases, particularly those containing appreciable amounts of sulfur. Because essentially equivalent high-temperature strength can be obtained with either the HL or HK grades, the improved corrosion resistance of the HL alloy makes it especially useful for severe service where excessive scaling must be avoided. This datasheet provides information on composition, physical properties, hardness, elasticity, and tensile properties as well as creep. It also includes information on high temperature performance and corrosion resistance as well as casting, heat treating, machining, and joining. Filing Code: SS-341. Producer or source: Stainless steel foundries.