Ductile Iron MIL-I-24137 Class B

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Ductile Iron MIL-I-24137 Class B
Categories:	Metal; Ferrous Metal; Cast Iron; Alloy Cast Iron; Ductile Iron
Material Notes:	Carbon represents the total carbon in the listed composition. Cerium is an optional constituent in ductile iron. Most ductile irons are specified based on mechanical properties and have loosely defined compositions. Austenitic, stress relieved at 650°C, or solution treated at 950°C if necessary to dissolve carbides. Applications include pressure parts, machine components and propellers and other marine components.
Key Words:	UNS F43020, MIL-I-24137 Class B, austenitic
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Physical Properties	Metric	English	Comments

Density	7.10 - 7.20 g/cc	0.257 - 0.260 lb/in³	Typical value of ductile iron

Mechanical Properties	Metric	English	Comments
Hardness, Brinell	<= 190	<= 190
Hardness, Knoop	211	211	Converted from Brinell
Hardness, Vickers	199	199	Approximated. Converted from Brinell hardness.
Tensile Strength, Ultimate	>= 379 MPa	>= 55000 psi
Tensile Strength, Yield	>= 207 MPa	>= 30000 psi
Elongation at Break	7.0 %	7.0 %	In 50 mm.

Component Elements Properties	Metric	English	Comments
Carbon, C	3.6 - 3.8 %	3.6 - 3.8 %
Cerium, Ce	0.0050 - 0.20 %	0.0050 - 0.20 %
Chromium, Cr	1.7 - 2.4 %	1.7 - 2.4 %
Copper, Cu	0.15 - 1.0 %	0.15 - 1.0 %
Iron, Fe	66.138 - 74.475 %	66.138 - 74.475 %
Magnesium, Mg	0.030 - 0.060 %	0.030 - 0.060 %
Manganese, Mn	0.15 - 1.0 %	0.15 - 1.0 %
Molybdenum, Mo	0.010 - 0.10 %	0.010 - 0.10 %
Nickel, Ni	18 - 22 %	18 - 22 %
Phosphorus, P	<= 0.20 %	<= 0.20 %
Silicon, Si	1.8 - 2.8 %	1.8 - 2.8 %
Sulfur, S	<= 0.0020 %	<= 0.0020 %

References for this datasheet.

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MDFE13 / 12010

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