ATI Allegheny Ludlum Stainless Steel 334 (UNS S33400)

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ATI Allegheny Ludlum Stainless Steel 334 (UNS S33400)
Categories:	Metal; Ferrous Metal; Stainless Steel; T 300 Series Stainless Steel
Material Notes:	Allegheny Ludlum Type 334 is a titanium- and aluminum-bearing austenitic stainless steel offering superior elevated temperature scaling resistance compared to the conventional chromium-nickel stainless steels such as Type 304. The oxidation resistance of Type 334 compares favorably with higher alloyed grades up to 1900°F, making it a good candidate alloy for use in emission control systems, and other applications where resistance to elevated temperature degradation is important. Information provided by Allegheny Ludlum Corporation.
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Physical Properties	Original Value	Comments

Density	8.03 g/cc

Mechanical Properties	Original Value	Comments
Hardness, Rockwell B	82
Tensile Strength, Ultimate	572.4 MPa
	103.4 MPa @Temperature 982 °C	1800°F
	469 MPa @Temperature 538 °C	1000°F
Tensile Strength, Yield	241.4 MPa
	62.8 MPa @Temperature 982 °C
	172.4 MPa @Temperature 538 °C
Elongation at Break	40 %
Modulus of Elasticity	200 GPa

Electrical Properties	Original Value	Comments
Electrical Resistivity	0.0000891 ohm-cm

Thermal Properties	Original Value	Comments
CTE, linear	17.04 µm/m-°C @Temperature 20.0 - 100 °C
	17.48 µm/m-°C @Temperature 20.0 - 200 °C
	17.66 µm/m-°C @Temperature 20.0 - 250 °C
	18.31 µm/m-°C @Temperature 20.0 - 400 °C
	18.54 µm/m-°C @Temperature 20.0 - 500 °C
	19.22 µm/m-°C @Temperature 20.0 - 700 °C
Thermal Conductivity	12.9 W/m-K @Temperature 20.0 - 50.0 °C
Maximum Service Temperature, Air	1038 °C	oxidation resistance is good

Component Elements Properties	Original Value	Comments
Aluminum, Al	<= 0.40 %
Carbon, C	<= 0.030 %
Chromium, Cr	19 - 19.5 %
Copper, Cu	<= 0.20 %
Iron, Fe	60 %	as balance
Manganese, Mn	<= 1.0 %
Nickel, Ni	19 - 20 %
Phosphorus, P	<= 0.020 %
Silicon, Si	<= 0.75 %
Sulfur, S	<= 0.015 %
Titanium, Ti	<= 0.40 %

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NL334 / 17883

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