ATI Allegheny Ludlum AL 403™ Martensitic Stainless Steel

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ATI Allegheny Ludlum AL 403™ Martensitic Stainless Steel
Categories:	Metal; Ferrous Metal; Martensitic; Stainless Steel; T S40000 Series Stainless Steel
Material Notes:	Characteristics: corrosion resistant, heat resistant, oxidation resistant up to 1400°F. Information provided by Allegheny Ludlum
Key Words:	UNS S40300
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Physical Properties	Original Value	Comments

Density	7.64 g/cc

Mechanical Properties	Original Value	Comments
Hardness, Rockwell B	<= 96	Annealed
	93 - 100	Hardened and Tempered
Tensile Strength, Ultimate	>= 483 MPa	Annealed
	>= 689 MPa	Hardened and Tempered
Tensile Strength, Yield	>= 207 MPa	Annealed
	>= 483 MPa	Hardened and Tempered
Elongation at Break	>= 18 %	Hardened and Tempered
	>= 25 %	Annealed
	>= 20 % @Thickness <=12.7 mm	Annealed

Electrical Properties	Original Value	Comments
Electrical Resistivity	0.0000570 ohm-cm @Temperature 20.0 °C
	0.0000640 ohm-cm @Temperature 100 °C
	0.0000720 ohm-cm @Temperature 200 °C
	0.0000880 ohm-cm @Temperature 400 °C
	0.0001035 ohm-cm @Temperature 600 °C
	0.000111 ohm-cm @Temperature 700 °C
Magnetic Permeability	900	Maximum for annealed alloy. Alloy is ferromagnetic in all conditions.

Thermal Properties	Original Value	Comments
CTE, linear	9.90 µm/m-°C @Temperature 20.0 - 100 °C
	11.2 µm/m-°C @Temperature 20.0 - 500 °C
	11.9 µm/m-°C @Temperature 20.0 - 787 °C
Specific Heat Capacity	0.460 J/g-°C @Temperature 0.000 - 100 °C
Thermal Conductivity	25.0 W/m-K @Temperature 100 °C
	28.8 W/m-K @Temperature 500 °C
Melting Point	1495 °C

Component Elements Properties	Original Value	Comments
Carbon, C	<= 0.15 %
Chromium, Cr	11.5 - 13 %
Iron, Fe	>= 84.68 %	As Remainder
Manganese, Mn	<= 1.0 %
Nickel, Ni	<= 0.60 %
Phosphorus, P	<= 0.040 %
Silicon, Si	<= 0.50 %
Sulfur, S	<= 0.030 %

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