ARMCO 12 SR was developed specifically for automotive exhaust applications. It has greater oxidation resistance than AISI Type 409 and it exhibits formability and weldability comparable to more highly alloyed ferritic grades. This datasheet provides information on composition, physical properties, microstructure, hardness, elasticity, and tensile properties. It also includes information on corrosion resistance as well as forming, heat treating, machining, and joining. Filing Code: SS-424. Producer or source: Armco Inc., Eastern Steel Division. Originally published April 1983, revised February 1986.

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 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.

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.

ARMCO 409 HIGH PERFORMANCE-10 has the lowest price of all of the manufacturer's stainless steels. It has an excellent combination of good formability, economy and good resistance to corrosion and oxidation; therefore, it is suited particularly to automotive exhaust applications, especially where improved formability over regular AISI Type 409 stainless steel is required. This datasheet provides information on composition, physical properties, hardness, elasticity, and tensile properties as well as fatigue. It also includes information on high temperature performance and corrosion resistance as well as forming, heat treating, machining, joining, and surface treatment. Filing Code: SS-479. Producer or source: Armco Inc., Eastern Steel Division.

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.

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.

Incoloy Alloy 864 is a high performance alloy developed specifically for automotive exhaust system flexible couplings and other exhaust applications. The alloy has a good combination of oxidation and corrosion resistance, with good mechanical strength, stability, and fatigue properties. This datasheet provides information on composition, physical properties, and elasticity. It also includes information on high temperature performance and corrosion resistance as well as joining. Filing Code: SS-708. Producer or source: Inco Alloys International Inc.

AK Steel 409 Ultra Form was created for applications needing oxidation or corrosion protection beyond the capability of carbon steel and some coated steels. AK Steel 409 Ultra Form is more formable than standard Type 409 stainless steel and is particularly suitable for parts requiring more complex shapes and improved weldability. Examples of applications include automotive exhaust tubing and stampings. This datasheet provides information on physical properties, hardness, elasticity, and tensile properties as well as deformation. It also includes information on high temperature performance as well as forming and joining. Filing Code: SS-990. Producer or source: AK Steel, Butler Operations.

ALLEGHENY LUDLUM MF-1 is a chromium-titanium corrosion resisting steel that was developed originally for automotive exhaust system applications. This datasheet provides information on composition, physical properties, and tensile properties. It also includes information on high temperature performance and corrosion resistance as well as forming, heat treating, machining, and joining. Filing Code: SS-263. Producer or source: Allegheny Ludlum Corporation.

ARMCO 439 HIGH PERFORMANCE-10 is a ferritic stainless steel sheet and strip alloy suited to automotive-exhaust system applications where oxidatin resistance is needed at temperatures beyond the capability of AISI Type 409 to withstand. The alloy also has good resistance to wet chloride environments. 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, heat treating, and joining. Filing Code: SS-486. Producer or source: Armco Inc., Specialty Steels Division.

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.

Timetal Exhaust XT is a lean alloy, but exhibits good corrosion resistance and higher strength than needed for automotive exhaust. This datasheet provides information on composition, physical properties, tensile properties, and bend strength as well as creep. It also includes information on high temperature performance and corrosion resistance as well as forming. Filing Code: Ti-156. Producer or source: Timet.

ATI 444 is a low-carbon and low-nitrogen ferritic stainless steel with 18Cr and 2Mo and is often referred to as "18-2". 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-1131. Producer or source: Allegheny Technologies Inc..

ATI 409HP (UNS S40900) ferritic stainless steel was introduced by ATI Allegheny Ludlum to provide improved oxidation and corrosion resistance for automotive exhaust systems in comparison to carbon steel. The alloy was designated "MF-1", indicating its end use: automotive mufflers. The good fabricability of this alloy, combined with its basic corrosion resistance and economy have significantly broadened the utility of ATI 409HP stainless steel. ATI 409HP consists of four grades: UNS S40900, S40910, S40920, and S40930. 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, machining, and joining. Filing Code: SS-1135. Producer or source: Allegheny Technologies Inc..

J and L Types 409 HP are ferritic stainless steels with 11% chromium. They exhibit an excellent combination of good formability, economy, and resistance to oxidation and corrosion. It is typically used in automotive exhaust systems. This datasheet provides information on composition, physical properties, hardness, elasticity, and tensile properties. It also includes information on corrosion resistance as well as forming, heat treating, and joining. Filing Code: SS-743. Producer or source: J & L Specialty Steel Inc.

Armco 11 Cr-Cb stainless steel has higher silicon content and is dual stabilized with titanium and columbium (niobium). The alloy is designed for use in automotive exhaust systems and should be considered where the performance of AISI Type 409 stainless steel is marginal. This datasheet provides information on composition, physical properties, hardness, elasticity, and tensile properties as well as creep and fatigue. It also includes information on corrosion resistance as well as joining. Filing Code: SS-690. Producer or source: Armco Inc., Specialty Steels Division.

J and L Type 409NI is a ferritic stainless steel with 11% Cr. It exhibits an excellent combination of good formability, economy, and resistance to oxidation and corrosion. It is typically used in automotive exhaust systems or where more forming is required. 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-902. Producer or source: J & L Specialty Steel Inc.

409 ALMZ is an aluminum-coated type 409. The substrate is AL 409HP, and the coating is applied by a hot-dipping process. The coating improves corrosion and oxidation resistance. The product will pass 72 h salt spray with no red rust according to ASTM B 117. This datasheet provides information on composition, hardness, tensile properties, and bend strength. It also includes information on corrosion resistance as well as forming, joining, and surface treatment. Filing Code: SS-939. Producer or source: Allegheny Ludlum Corporation.

CARPENTER AMS 5700 is an austenitic chromium-nickel-tungsten valve steel which offers good high-temperature properties and resistance to corrosion in exhaust valves. This datasheet provides information on composition, physical properties, hardness, and tensile properties as well as fracture toughness and creep. It also includes information on high temperature performance and corrosion resistance as well as forming, heat treating, and machining. Filing Code: SS-313. Producer or source: Carpenter Technology Corporation.