AISI 4820 Steel, mock carburized, reheated to 800°C (1470°F), 230°C (450°F) temper, 50 mm (2 in.) round

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AISI 4820 Steel, mock carburized, reheated to 800°C (1470°F), 230°C (450°F) temper, 50 mm (2 in.) round
Categories:	Metal; Ferrous Metal; Alloy Steel; AISI 4000 Series Steel; Low Alloy Steel; Carbon Steel; Low Carbon Steel
Material Notes:	Mock carburized at 925°C (1700°F) for 8 hours, reheated to 800°C (1470°F), oil quenched, 230°C (450°F) temper, 50 mm round. Post oil quenched hardness 36 HRC surface, 31 HRC half-radius, 27 HRC center
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	269	269
Hardness, Knoop	294	294	Converted from Brinell
Hardness, Rockwell B	99	99	Converted from Brinell
Hardness, Rockwell C	27	27	Converted from Brinell
Hardness, Vickers	284	284	Converted from Brinell
Tensile Strength, Ultimate	896 MPa	130000 psi
Tensile Strength, Yield	635 MPa @Strain 0.2 %	92100 psi @Strain 0.2 %
Elongation at Break	19 %	19 %	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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M482BB / 7997

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