AISI 4820H Steel, mock carburized, reheated to 800°C (1470°F), 150°C (300°F) temper, 13 mm (0.5 in.) round

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AISI 4820H Steel, mock carburized, reheated to 800°C (1470°F), 150°C (300°F) temper, 13 mm (0.5 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, 150°C (300°F) temper, 13 mm round. Post oil quenched hardness 45 HRC surface, 45 HRC half-radius, 44 HRC center
Key Words:	UNS H48200, ASTM A304, SAE J1268, low carbon steels
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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	401	401
Hardness, Knoop	432	432	Converted from Brinell
Hardness, Rockwell B	102	102	Converted from Brinell
Hardness, Rockwell C	44	44	Converted from Brinell
Hardness, Vickers	425	425	Converted from Brinell
Tensile Strength, Ultimate	1440 MPa	209000 psi
Tensile Strength, Yield	1195 MPa	173300 psi
Elongation at Break	14.2 %	14.2 %	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 steels.

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	0.17 - 0.23 %	0.17 - 0.23 %
Iron, Fe	94.495 - 95.88 %	94.495 - 95.88 %	As remainder
Manganese, Mn	0.40 - 0.80 %	0.40 - 0.80 %
Molybdenum, Mo	0.20 - 0.30 %	0.20 - 0.30 %
Nickel, Ni	3.2 - 3.8 %	3.2 - 3.8 %
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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