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AISI 4118 Steel, direct quenched from pot, carburized, 150°C (300°F) temper
Categories:
Metal
;
Ferrous Metal
;
Alloy Steel
;
AISI 4000 Series Steel
;
Low Alloy Steel
;
Carbon Steel
;
Low Carbon Steel
Material Notes:
Heat treatment: Direct quenched from pot, carburized at 925°C for 8 hrs., quenched in agitated oil, 150°C (300°F) temper, 1.6 mm case depth.
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
352
Hardness, Knoop
381
Converted from Brinell
Hardness, Rockwell B
99
Converted from Brinell
Hardness, Rockwell C
39
Converted from Brinell
Hardness, Vickers
372
Converted from Brinell
Tensile Strength, Ultimate
1225
MPa
Tensile Strength, Yield
903
MPa
Elongation at Break
9.0 %
in 50 mm
Reduction of Area
42.3 %
Modulus of Elasticity
205
GPa
Typical for steel
Bulk Modulus
160
GPa
Typical for steel
Poissons Ratio
0.29
Calculated
Fatigue Strength
758
MPa
specimen with 1.02 mm case depth, 64 HRC case hardness
772
MPa
specimen with 0.33 mm case depth, HRC 63 case hardness
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.
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
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Users viewing this material also viewed the following:
AISI 4118 Steel, direct quenched from pot, carburized, 230°C (450°F) temper
AISI 4118 Steel, double quenched and tempered, carburized, 230°C (450°F) temper
Overview of materials for AISI 4000 Series Steel
AISI 4118 Steel, single quenched and tempered, carburized, 230°C (450°F) temper
AISI 4118 Steel, annealed at 870°C (1600°F), furnace cooled at 11°C (20°F)/hour, 25 mm (1 in.) round
M4118N / 7474
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