AISI 4718 Steel, pseudocarburized, reheated to 850°C (1560°F) and oil quenched, 150°C (300°F) temper, 13.7 mm round

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AISI 4718 Steel, pseudocarburized, reheated to 850°C (1560°F) and oil quenched, 150°C (300°F) temper, 13.7 mm round
Categories:	Metal; Ferrous Metal; Alloy Steel; AISI 4000 Series Steel; Low Alloy Steel; Carbon Steel; Low Carbon Steel
Material Notes:	Full heat treatment: normalized at 925°C (1700°F), machined to 25 mm (1 in.), pseudocarburized at 925°C (1700°F) for 8 hours, box cooled to RT, reheated to 850°C (1560°F), 150°C (300°F) temper, machined and tested in 12.8 mm (0.505 in.) rounds
Key Words:	alloy steels, UNS G47180, ASTM A322, ASTM A331, ASTM A505, SAE J404, SAE J412, SAE J770, DIN 1.6755
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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	1172 MPa
Tensile Strength, Yield	841 MPa
Elongation at Break	13 %
Reduction of Area	52 %
Modulus of Elasticity	205 GPa	Typical for steel
Bulk Modulus	160 GPa	Typical for steel.
Poissons Ratio	0.29	Calculated
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	0.16 - 0.21 %
Chromium, Cr	0.35 - 0.55 %
Iron, Fe	96.31 - 97.39 %	As remainder
Manganese, Mn	0.70 - 0.90 %
Molybdenum, Mo	0.30 - 0.40 %
Nickel, Ni	0.90 - 1.2 %
Phosphorus, P	<= 0.040 %
Silicon, Si	0.20 - 0.35 %
Sulfur, S	<= 0.040 %

References for this datasheet.

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M4718G / 7940

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