AK Steel 439 has superior oxidation resistance and corrosion resistance compared to Type 409, which makes 439 attractive for numerous automotive exhaust applications. This datasheet provides information on composition, physical properties, hardness, elasticity, and tensile properties. It also includes information on high temperature performance and corrosion resistance as well as forming and joining. Filing Code: SS-874. Producer or source: AK Steel Corporation.

AK Steel 439 Ultra Form (UF) has oxidation resistance and corrosion resistance superior to Type 409. The alloy also has an equiaxed microstructure and improved formability. This datasheet provides information on composition, physical properties, hardness, elasticity, and tensile properties as well as creep and fatigue. It also includes information on high temperature performance and corrosion resistance as well as forming and joining. Filing Code: SS-877. Producer or source: AK Steel Corporation.

AK Steel 439 LT is a ferritic stainless steel that has both oxidation resistance and corrosion resistance superior to Type 409, making the alloy attractive for numerous difficult-to-form automotive exhaust applications. The lower titanium content of this alloy compared to Type 439 (see Alloy Digest SS-874, February 2003) provides an improved surface essentially free from titanium scale. This datasheet provides information on composition, physical properties, hardness, elasticity, and tensile properties as well as deformation. It also includes information on corrosion resistance as well as forming and joining. Filing Code: SS-880. Producer or source: AK Steel Corporation.

AK Steel 441 has good high-temperature strength, an equiaxed microstructure, and good high-temperature oxidation resistance. The alloy is a niobium-bearing ferritic stainless steel. This datasheet provides information on composition, hardness, and tensile properties as well as deformation. It also includes information on high temperature performance and corrosion resistance as well as forming and joining. Filing Code: SS-965. Producer or source: AK Steel.

AK Steel 18 Cr-Cb HF has an equiaxed microstructure, good high-temperature strength, and good high-temperature oxidation resistance. The alloy was designed to provide improved formability, particularly in multiple forming operations, due in part to a finer final annealed grain structure. This datasheet provides information on composition, hardness, and tensile properties as well as deformation. It also includes information on high temperature performance and corrosion resistance as well as forming and joining. Filing Code: SS-960. Producer or source: AK Steel.

AK Steel 436L Ultra Form out performs AISI Type 409 in oxidation and corrosion. This material is resistant to stress-corrosion cracking in the presence of chlorides and has excellent formability. The alloy is used in exhaust systems. This datasheet provides information on composition, hardness, and tensile properties. It also includes information on high temperature performance and corrosion resistance as well as forming and joining. Filing Code: SS-1062. Producer or source: AK Steel Corporation.

AK Steel 15 Cr-Cb Ultra Form is designed for formability with hot strength and oxidation resistance. This datasheet provides information on composition, hardness, and tensile properties. It also includes information on high temperature performance and corrosion resistance as well as forming and joining. Filing Code: SS-1143. Producer or source: AK Steel Corporation.

AK Steel 13-4SR equals AISI Type 409 in corrosion. The alloy with 3.75% Al is used in exhaust systems and has excellent oxidation resistance. This datasheet provides information on composition, physical properties, hardness, and tensile properties. It also includes information on corrosion resistance as well as forming and joining. Filing Code: SS-1144. Producer or source: AK Steel Corporation.

AK Steel Chromeshield 22 stainless steel combines the exceptional corrosion performance of a high chromium ferritic alloy with the enhanced ductility of AK Steel’s Ultra Form technology. This datasheet provides information on composition, hardness, and tensile properties. It also includes information on high temperature performance and corrosion resistance as well as forming and joining. Filing Code: SS-1242. Producer or source: AK Steel.

Thermak 17 is a high-temperature ferritic stainless steel alloy with oxidation resistance to 1093 deg C (2000 deg F). This datasheet provides information on composition, physical properties, hardness, and tensile properties as well as fatigue. It also includes information on high temperature performance and corrosion resistance as well as forming, heat treating, and joining. Filing Code: SS-1239. Producer or source: AK Steel Corporation.

Cleveland-Cliffs 11 Cr-Cb is a ferritic stainless steel that has increased silicon levels and is dual stabilized with titanium and niobium. It provides elevated temperature strength and oxidation resistance superior to that of type 409 and comparable to those of 18 Cr-Cb and type 439 stainless steels. This alloy should be considered for applications in which type 409 stainless steel provides only marginal strength and oxidation resistance. This datasheet provides information on composition, physical properties, hardness, elasticity, and tensile properties as well as fatigue. It also includes information on corrosion resistance as well as forming and joining. Filing Code: SS-1343. Producer or source: Cleveland-Cliffs Inc.

Cleveland-Cliffs Thermak 17 is a ferritic stainless steel that is stabilized with both titanium and niobium. When given a high-temperature, final solution anneal, the alloy exhibits dramatic creep resistance. The dual stabilization prevents carbide sensitization exposure and makes the alloy thermally non-hardenable. Cleveland-Cliffs Thermak 17 is designed for demanding, hot-end automotive exhaust applications where intermediate or high chromium grades may not be sufficient or where down gauging for lightweighting is desired. This datasheet provides information on composition, physical properties, hardness, and tensile properties as well as creep. It also includes information on corrosion resistance as well as forming and joining. Filing Code: SS-1345. Producer or source: Cleveland-Cliffs Inc.

Cleveland-Cliffs 430 Ultra Form is a ferritic stainless steel that was developed as a more formable version of type 430 stainless steel. It contains a small addition of titanium and has a more equiaxed microstructure. It is particularly suited for parts having complex shapes. Cleveland-Cliffs 430 Ultra Form combines good corrosion resistance with heat and oxidation resistance up to 815 °C (1500 °F), while having improved mechanical properties over type 430 stainless steel. This datasheet provides information on composition, physical properties, hardness, and tensile properties. It also includes information on corrosion resistance as well as forming, heat treating, and joinability. Filing Code: SS-1344. Producer or source: Cleveland-Cliffs Inc.