AK Steel 12 SR™ Ferritic Stainless steel

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AK Steel 12 SR™ Ferritic Stainless steel (discontinued **)
Categories:	Metal; Ferrous Metal; Ferritic; Stainless Steel
Material Notes:	AK Steel 12 SR™ provides a more oxidation-resistant alternative to Type 409 stainless steel. In addition it provides formability and weldability comparable to other more highly alloyed ferritic stainless steels. AK Steel 12 SR™ was developed specifically for automotive exhaust gas applications. Non-automotive applications include heat exchangers, flue liners, and commercial furnaces. Mechanical properties for 1950°F Anneal Information provided by AK Steel
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Physical Properties	Metric	English	Comments

Density	7.63 g/cc	0.276 lb/in³

Mechanical Properties	Metric	English	Comments
Hardness, Rockwell B	80.5	80.5	Typical
	<= 92	<= 92	Specification
Tensile Strength, Ultimate	>= 448 MPa	>= 65000 psi	Specification
	503 MPa	73000 psi	Typical
	35.0 MPa @Temperature 871 °C	5080 psi @Temperature 1600 °F
	149 MPa @Temperature 704 °C	21600 psi @Temperature 1300 °F
	368 MPa @Temperature 538 °C	53400 psi @Temperature 1000 °F
Tensile Strength, Yield	>= 276 MPa @Strain 0.2 %	>= 40000 psi @Strain 0.2 %	Specification
	345 MPa @Strain 0.2 %	50000 psi @Strain 0.2 %	Typical
	29.0 MPa @Strain 0.2 %, Temperature 1600 °C	4210 psi @Strain 0.2 %, Temperature 2910 °F
	111 MPa @Strain 0.2 %, Temperature 1300 °C	16100 psi @Strain 0.2 %, Temperature 2370 °F
	196 MPa @Strain 0.2 %, Temperature 1000 °C	28400 psi @Strain 0.2 %, Temperature 1830 °F
Elongation at Break	>= 20 %	>= 20 %	in 2 inches, Specification
	31.5 %	31.5 %	in 2 inches, Typical
Modulus of Elasticity	189 GPa	27400 ksi

Component Elements Properties	Metric	English	Comments
Aluminum, Al	1.2 %	1.2 %
Carbon, C	0.020 %	0.020 %
Chromium, Cr	12 %	12 %
Iron, Fe	85.38 %	85.38 %	As Remainder
Niobium, Nb (Columbium, Cb)	0.60 %	0.60 %
Silicon, Si	0.50 %	0.50 %
Titanium, Ti	0.30 %	0.30 %

**
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