AISI 4118 Steel, mock carburized at 925°C (1700°F) for 8 hours, reheated to 830°C (1525°F), oil quenched, 150°C (300°F) temper, 150°C (300°F) temper, 14 mm (0.55 in.) round

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AISI 4118 Steel, mock carburized at 925°C (1700°F) for 8 hours, reheated to 830°C (1525°F), oil quenched, 150°C (300°F) temper, 150°C (300°F) temper, 14 mm (0.55 in.) round
Categories:	Metal; Ferrous Metal; Alloy Steel; AISI 4000 Series Steel; Low Alloy Steel; Carbon Steel; Low Carbon Steel
Material Notes:	Heat treatment: Mock carburized at 925°C (1700°F) for 8 hrs., reheated to 830°C (1525°F), oil quenched, 150°C (300°F) temper.
Key Words:	alloy steels, UNS G41180, ASTM A322, ASTM A331, ASTM A505, ASTM A519
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Physical Properties	Original Value	Comments

Density	7.85 g/cc

Mechanical Properties	Original Value	Comments
Hardness, Brinell	293
Hardness, Knoop	319	Converted from Brinell
Hardness, Rockwell B	99	Converted from Brinell
Hardness, Rockwell C	31	Converted from Brinell
Hardness, Vickers	309	Converted from Brinell
Tensile Strength, Ultimate	986 MPa
Tensile Strength, Yield	645 MPa
Elongation at Break	17.5 %	in 50 mm
Reduction of Area	41.3 %
Modulus of Elasticity	205 GPa	Typical for steel
Bulk Modulus	160 GPa	Typical for steel
Poissons Ratio	0.29	Calculated
Machinability	60 %	hot rolled and cold drawn. Based on 100% machinability for AISI 1212 steel.
Shear Modulus	80.0 GPa	Typical for steel

Electrical Properties	Original Value	Comments
Electrical Resistivity	0.0000245 ohm-cm	Typical 4000 series steel

Thermal Properties	Original Value	Comments
Specific Heat Capacity	0.475 J/g-°C	Typical 4000 series steel
Thermal Conductivity	44.5 W/m-K	Typical steel

Component Elements Properties	Original Value	Comments
Carbon, C	0.18 - 0.23 %
Chromium, Cr	0.40 - 0.60 %
Iron, Fe	97.7 - 98.49 %	As remainder
Manganese, Mn	0.70 - 0.90 %
Molybdenum, Mo	0.080 - 0.15 %
Phosphorus, P	<= 0.035 %
Silicon, Si	0.15 - 0.35 %
Sulfur, S	<= 0.040 %

References for this datasheet.

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M4118F / 7466

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