AK Steel 409 Ferritic Stainless steel

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AK Steel 409 Ferritic Stainless steel
Categories:	Metal; Ferrous Metal; Ferritic; Stainless Steel; T 400 Series Stainless Steel
Material Notes:	AK Steel 409 Stainless Steels are especially useful for applications where oxidation or corrosion protection beyond the capacity of carbon steel and some coated steels is needed. Current applications include automotive and truck exhaust systems, including tubular manifolds; agricultural spreaders, gas turbine exhaust silencers, and heat exchangers. AK Steel 409 is also useful for "difficult-to-form" hardware such as fuel filters. Information provided by AK Steel
Key Words:	UNS S40920
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Physical Properties	Original Value	Comments

Density	7.61 g/cc

Mechanical Properties	Original Value	Comments
Hardness, Rockwell B	66 - 72 @Thickness 1.02 - 1.78 mm	Annealed Condition
Tensile Strength, Ultimate	414 - 469 MPa @Thickness 1.02 - 1.78 mm	Annealed Condition
	6.20 MPa @Thickness 1.14 - 1.52 mm, Temperature 816 °C
	10.3 MPa @Thickness 1.14 - 1.52 mm, Temperature 816 °C
	22.0 MPa @Thickness 1.14 - 1.52 mm, Temperature 704 °C
	27.5 MPa @Thickness 1.14 - 1.52 mm, Temperature 704 °C
Tensile Strength, Yield	241 - 283 MPa @Strain 0.2 %, Thickness 1.02 - 1.78 mm	Annealed Condition
Elongation at Break	31 - 39 %	in 2 inches, Annealed Condition (0.040" - 0.070")
Modulus of Elasticity	208 GPa
Fatigue Strength	10.0 MPa @# of Cycles 1.00e+7 , Temperature 816 °C
	117 MPa @# of Cycles 1.00e+7 , Temperature 593 °C
	324 MPa @# of Cycles 1.00e+7

Electrical Properties	Original Value	Comments
Electrical Resistivity	0.0000600 ohm-cm

Component Elements Properties	Original Value	Comments
Carbon, C	<= 0.020 %
Chromium, Cr	10.5 - 11.7 %
Iron, Fe	>= 85.3 %	As Remainder
Manganese, Mn	<= 0.75 %
Nickel, Ni	<= 0.50 %
Nitrogen, N	<= 0.020 %
Phosphorus, P	<= 0.040 %
Silicon, Si	<= 1.0 %
Sulfur, S	<= 0.020 %
Titanium, Ti	0.15 - 0.50 %

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NAKS093 / 14696

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