AISI 4820 Steel, double quenched and tempered (150°C (300°F)), 1.2 mm case depth

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AISI 4820 Steel, double quenched and tempered (150°C (300°F)), 1.2 mm case depth
Categories:	Metal; Ferrous Metal; Alloy Steel; AISI 4000 Series Steel; Low Alloy Steel; Carbon Steel; Low Carbon Steel
Material Notes:	Carburized at 925°C (1700°F) for 8 hrs., pot cooled, reheated to 815°C (1500°F), oil quenched, reheated to 790°C (1450°F), oil quenched, 150°C (300°F) temper. 1.2mm case depth. Recommended practice for max. case hardness
Key Words:	SAE 770, low carbon steels, UNS G48200, ASTM A322, ASTM A331, ASTM A505, ASTM A519, ASTM A535, SAE J404, SAE J414,
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Physical Properties	Metric	English	Comments

Density	7.85 g/cc	0.284 lb/in³

Mechanical Properties	Metric	English	Comments
Hardness, Brinell	415	415
Hardness, Knoop	446	446	Converted from Brinell
Hardness, Rockwell B	103	103	Converted from Brinell
Hardness, Rockwell C	60	60	case hardness at 1.2mm case depth.
Hardness, Vickers	440	440	Converted from Brinell
Tensile Strength, Ultimate	1410 MPa	205000 psi
Tensile Strength, Yield	1141 MPa	165500 psi
Elongation at Break	13.8 %	13.8 %	in 50 mm.
Modulus of Elasticity	205 GPa	29700 ksi	Typical for steel
Bulk Modulus	160 GPa	23200 ksi	Typical for steel
Poissons Ratio	0.29	0.29	Calculated
Machinability	50 %	50 %	annealed and cold drawn. Based on 100% machinability for AISI 1212 steel.
Shear Modulus	80.0 GPa	11600 ksi	Typical for steel

Electrical Properties	Metric	English	Comments
Electrical Resistivity	0.0000245 ohm-cm	0.0000245 ohm-cm	Typical 4000 series steel

Thermal Properties	Metric	English	Comments
Specific Heat Capacity	0.475 J/g-°C	0.114 BTU/lb-°F	Typical 4000 series steel
Thermal Conductivity	44.5 W/m-K	309 BTU-in/hr-ft²-°F	Typical steel

Component Elements Properties	Metric	English	Comments
Carbon, C	0.18 - 0.23 %	0.18 - 0.23 %
Iron, Fe	94.645 - 95.72 %	94.645 - 95.72 %	As remainder
Manganese, Mn	0.50 - 0.70 %	0.50 - 0.70 %
Molybdenum, Mo	0.20 - 0.30 %	0.20 - 0.30 %
Nickel, Ni	3.25 - 3.75 %	3.25 - 3.75 %
Phosphorus, P	<= 0.035 %	<= 0.035 %
Silicon, Si	0.15 - 0.30 %	0.15 - 0.30 %
Sulfur, S	<= 0.040 %	<= 0.040 %

References for this datasheet.

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M482AE / 7974

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