AISI 4620 Steel, single quenched and tempered, carburized, oil quenched, 230°C (450°F) temper

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AISI 4620 Steel, single quenched and tempered, carburized, oil quenched, 230°C (450°F) temper
Categories:	Metal; Ferrous Metal; Alloy Steel; AISI 4000 Series Steel; Low Alloy Steel; Carbon Steel; Low Carbon Steel
Material Notes:	Single quenched and tempered: carburized at 925°C (1700°F) for 8 hrs., pot cooled, reheated to 815°C (1500°F), quenched in agitated oil, 230°C (450°F) temper. 1.7 mm case depth.
Key Words:	SAE J404, SAE J412, SAE J799, UNS G46200, AMS 6294, ASTM A322, ASTM A331, ASTM A505, ASTM A535, MIL SPEC MIL-S-7493 (A4620)
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Physical Properties	Original Value	Comments

Density	7.85 g/cc

Mechanical Properties	Original Value	Comments
Hardness, Brinell	248	Core Property
Hardness, Knoop	272	Converted from Brinell
Hardness, Rockwell B	98	Converted from Brinell
Hardness, Rockwell C	23	case hardness at 1.7 mm. Peak case hardness: 64 HRC at 0.94 mm, 63 HRC at 0.38 mm
Hardness, Vickers	261	Converted from Brinell
Tensile Strength, Ultimate	796.3 MPa
Tensile Strength, Yield	557 MPa
Elongation at Break	20.5 %	in 50 mm
Reduction of Area	63.6 %
Modulus of Elasticity	205 GPa	Typical for steel
Bulk Modulus	160 GPa	Typical for steel
Poissons Ratio	0.29	Calculated
Fracture Toughness	30.0 - 45.0 ksi-in½	cracks originating in case; case depth 0.30 to 0.35 in.
	65.0 - 105 ksi-in½	cracks originating in core
Machinability	65 %	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	0.17 - 0.22 %
Iron, Fe	96.405 - 97.38 %	As remainder
Manganese, Mn	0.45 - 0.65 %
Molybdenum, Mo	0.20 - 0.30 %
Nickel, Ni	1.65 - 2.0 %
Phosphorus, P	<= 0.035 %
Silicon, Si	0.15 - 0.35 %
Sulfur, S	<= 0.040 %

References for this datasheet.

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M462BD / 7901

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