AK Steel 439 Ferritic Stainless steel

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AK Steel 439 Ferritic Stainless steel
Categories:	Metal; Ferrous Metal; Ferritic; Stainless Steel; T 400 Series Stainless Steel
Material Notes:	AK Steel 439 has better oxidation and corrosion resistance than Type 409. This alloy also has optimum formability that is reproducible coil after coil and heat after heat. This provides special advantages when producing difficult-to-form exhaust system components. Information provided by AK Steel
Key Words:	UNS S43900
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Physical Properties	Metric	English	Comments

Density	7.70 g/cc	0.278 lb/in³

Mechanical Properties	Metric	English	Comments
Hardness, Rockwell B	74 - 78	74 - 78
Tensile Strength, Ultimate	455 - 483 MPa	66000 - 70100 psi
Tensile Strength, Yield	296 - 331 MPa @Strain 0.2 %	42900 - 48000 psi @Strain 0.2 %
Elongation at Break	32 - 36 %	32 - 36 %	in 2 inches

Component Elements Properties	Metric	English	Comments
Carbon, C	<= 0.025 %	<= 0.025 %
Chromium, Cr	17 - 19 %	17 - 19 %
Iron, Fe	>= 78.725 %	>= 78.725 %	As Remainder
Manganese, Mn	<= 0.50 %	<= 0.50 %
Nickel, Ni	<= 0.50 %	<= 0.50 %
Silicon, Si	<= 0.75 %	<= 0.75 %
Titanium, Ti	0.20 - 0.50 %	0.20 - 0.50 %

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NAKS098 / 14701

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