Type HW is a nickel-base austenitic casting grade with good resistance to oxidation and carburization and is especially suited for applications where wide and/or frequent fluctuations in temperature occur. This datasheet provides information on composition, physical properties, and elasticity as well as creep. It also includes information on high temperature performance and corrosion resistance as well as machining and joining. Filing Code: Ni-449. Producer or source: Steel Founders Society. Originally published as Alloy Digest Ni-37, November 1957, updated April 1994.

TYPE HX is a nickel-base austenitic casting, similar to HW (See Alloy Digest Ni-449, April 1994), but containing more nickel and chromium, thus having better oxidation resistance. It is used in applications up to 1150 C (2100 F). 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 machining and joining. Filing Code: Ni-454. Producer or source: Steel Founders Society.

Type HW is a nickel-base alloy containing chromium and iron. It is austenitic, non-magnetic, and has exceptionally high resistance to corrosion, cyclic heating, and oxidation. It is of the 60 Ni-12Cr type alloy. 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: Ni-37. Producer or source: Stainless steel foundries. Revised as Alloy Digest Ni-449, April 1994.

Type HH is an iron-chromium-nickel casting alloy having high heat, oxidation and corrosion resistance. It is recommended for furnace parts, salt pots, grate bars, belt conveyors and other parts operating up to 21008 F in intermittent service. It may be supplied in partially ferritic Type I or in wholly austenitic Type II depending on the applications and service requirements. This datasheet provides information on composition, physical properties, hardness, elasticity, and tensile properties as well as fracture toughness and creep. It also includes information on high temperature performance and corrosion resistance as well as casting, heat treating, machining, and joining. Filing Code: SS-221. Producer or source: Stainless steel mills.