AISI 4718 Steel, pseudocarburized and oil quenched, 150°C (300°F) temper, 25 mm round

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AISI 4718 Steel, pseudocarburized and oil quenched, 150°C (300°F) temper, 25 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 and oil quenched, 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	341
Hardness, Knoop	369	Converted from Brinell
Hardness, Rockwell B	99	Converted from Brinell
Hardness, Rockwell C	37	Converted from Brinell
Hardness, Vickers	361	Converted from Brinell
Tensile Strength, Ultimate	1127 MPa
Tensile Strength, Yield	812 MPa
Elongation at Break	15.3 %
Reduction of Area	51 %
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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M4718D / 7937

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