ATI Allegheny Ludlum AL 468™ Dual Stabilized- Low Titanium Stainless Steel

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ATI Allegheny Ludlum AL 468™ Dual Stabilized- Low Titanium Stainless Steel
Categories:	Metal; Ferrous Metal; Ferritic; Stainless Steel; T S40000 Series Stainless Steel
Material Notes:	Characteristics:good corrosion resistance in a wide range of environments, can be used in annealed cold formed or as-welded conditions. Applications: used in place of Type 304 in an oxidizing when resistance to stress corrosion cracking is needed, use in place of Type 409 at high temperatures, automotive exhaust system components, residential furnace heat exchangers, shell and tube heat exchangers, nuclear applications. Information provided by Allegheny Ludlum
Key Words:	UNS S46800, ASTM A240
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Mechanical Properties	Original Value	Comments

Hardness, Rockwell B	75
Tensile Strength, Ultimate	461.9 MPa
	34.5 MPa @Temperature 871 °C
	89.6 MPa @Temperature 760 °C
	206.8 MPa @Temperature 648 °C
	282.7 MPa @Temperature 537 °C
	324.1 MPa @Temperature 426 °C
	386.1 MPa @Temperature 204 °C
Tensile Strength, Yield	27.6 MPa @Temperature 871 °C
	62.1 MPa @Temperature 760 °C
	117.2 MPa @Temperature 648 °C
	165.5 MPa @Temperature 537 °C
	186.2 MPa @Temperature 426 °C
	220.6 MPa @Temperature 204 °C
	289.6 MPa @Strain 0.2 %
Elongation at Break	32 %
	17 % @Temperature 537 °C
	18 % @Temperature 648 °C
	20 % @Temperature 426 °C
	26 % @Temperature 204 °C
	30 % @Temperature 760 °C
	55 % @Temperature 871 °C
	70 % @Temperature 924 °C

Thermal Properties	Original Value	Comments
CTE, linear	10.2 µm/m-°C @Temperature 20.0 - 100 °C
	11.6 µm/m-°C @Temperature 20.0 - 500 °C
	13.6 µm/m-°C @Temperature 20.0 - 1000 °C

Component Elements Properties	Original Value	Comments
Aluminum, Al	0.030 %
Carbon, C	0.0090 %
Chromium, Cr	18.25 %
Iron, Fe	>= 80.15 %	As Remainder
Manganese, Mn	0.40 %
Nickel, Ni	0.22 %
Niobium, Nb (Columbium, Cb)	0.25 %
Nitrogen, N	0.016 %
Phosphorus, P	0.024 %
Silicon, Si	0.55 %
Sulfur, S	0.0010 %
Titanium, Ti	0.10 %

Descriptive Properties
Corrosion Rate mils per year	324	10% Ferric Chloride, RT (ASTM G-48)
Corrosion Rate mils per year (base metal)	0.12	20% Acetic, Boiling
	0.48	20% Phosphoric, Boiling
	0.6	20% Phosphoric, Boiling
	114 (ASTM A262, Practice C)	65% Nitric, Boiling
	76.8	45% Formic Acid, Boiling
	82.2 (ASTM A262, Practice B)	Ferric Sulfate, Room Temperature; Sulfuric Acid, Boiling
	OK (ASTM A262 Practice E)	Copper-Copper, Boiling; Sulfate-Sulfuric, Boiling
Corrosion Rate mils per year (weld)	0.12	20% Acetic, Boiling
	366	10% Ferric Chloride, RT (ASTM G-48)
	687.6	45% Formic Acid, Boiling
	85.2 (ASTM A262, Practice B)	Ferric Sulfate, Room Temperature; Sulfuric Acid, Boiling
	90 (ASTM A262, Practice C)	65% Nitric, Boiling
	OK (ASTM A262 Practice E)	Copper-Copper, Boiling; Sulfate-Sulfuric, Boiling

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NL1023 / 17791

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