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	Metric	English	Comments

Density	7.64 g/cc	0.276 lb/in³

Mechanical Properties	Metric	English	Comments
Hardness, Rockwell B	<= 96	<= 96	Annealed
	93 - 100	93 - 100	Hardened and Tempered
Tensile Strength, Ultimate	>= 483 MPa	>= 70100 psi	Annealed
	>= 689 MPa	>= 99900 psi	Hardened and Tempered
Tensile Strength, Yield	>= 207 MPa	>= 30000 psi	Annealed
	>= 483 MPa	>= 70100 psi	Hardened and Tempered
Elongation at Break	>= 18 %	>= 18 %	Hardened and Tempered
	>= 25 %	>= 25 %	Annealed
	>= 20 % @Thickness <=12.7 mm	>= 20 % @Thickness <=0.500 in	Annealed

Electrical Properties	Metric	English	Comments
Electrical Resistivity	0.0000570 ohm-cm @Temperature 20.0 °C	0.0000570 ohm-cm @Temperature 68.0 °F
	0.0000640 ohm-cm @Temperature 100 °C	0.0000640 ohm-cm @Temperature 212 °F
	0.0000720 ohm-cm @Temperature 200 °C	0.0000720 ohm-cm @Temperature 392 °F
	0.0000880 ohm-cm @Temperature 400 °C	0.0000880 ohm-cm @Temperature 752 °F
	0.0001035 ohm-cm @Temperature 600 °C	0.0001035 ohm-cm @Temperature 1110 °F
	0.000111 ohm-cm @Temperature 700 °C	0.000111 ohm-cm @Temperature 1290 °F
Magnetic Permeability	900	900	Maximum for annealed alloy. Alloy is ferromagnetic in all conditions.

Thermal Properties	Metric	English	Comments
CTE, linear	9.90 µm/m-°C @Temperature 20.0 - 100 °C	5.50 µin/in-°F @Temperature 68.0 - 212 °F
	11.2 µm/m-°C @Temperature 20.0 - 500 °C	6.22 µin/in-°F @Temperature 68.0 - 932 °F
	11.9 µm/m-°C @Temperature 20.0 - 787 °C	6.61 µin/in-°F @Temperature 68.0 - 1450 °F
Specific Heat Capacity	0.460 J/g-°C @Temperature 0.000 - 100 °C	0.110 BTU/lb-°F @Temperature 32.0 - 212 °F
Thermal Conductivity	25.0 W/m-K @Temperature 100 °C	174 BTU-in/hr-ft²-°F @Temperature 212 °F
	28.8 W/m-K @Temperature 500 °C	200 BTU-in/hr-ft²-°F @Temperature 932 °F
Melting Point	1495 °C	2723 °F

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

Some of the values displayed above may have been converted from their original units and/or rounded in order to display the information in a consistent format. Users requiring more precise data for scientific or engineering calculations can click on the property value to see the original value as well as raw conversions to equivalent units. We advise that you only use the original value or one of its raw conversions in your calculations to minimize rounding error. We also ask that you refer to MatWeb's terms of use regarding this information. Click here to view all the property values for this datasheet as they were originally entered into MatWeb.

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