AISI 5120H Steel, heat treated, machined to 25 mm, pseudocarburized, reheated to 845°C (1550°F), 150°C (300°F) temper

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AISI 5120H Steel, heat treated, machined to 25 mm, pseudocarburized, reheated to 845°C (1550°F), 150°C (300°F) temper
Categories:	Metal; Ferrous Metal; Alloy Steel; AISI 5000 Series Steel; Low Alloy Steel; Carbon Steel; Low Carbon Steel
Material Notes:	Normalized 925°C (1700°F) in 32mm rounds, machined to 25 mm rounds, pseudocarburized at 925°C (1700°F) for 8 h., box cooled to RT, reheated to 845°C (1550°F), oil quenched, 150°C (300°F) temper, machined and tested in 12.8mm rounds.
Key Words:	UNS H51200, ASTM A304, SAE J1268, DIN 1.7147, AFNOR 20 MC 5 (Fr), 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	285	285
Hardness, Knoop	311	311	Converted from Brinell
Hardness, Rockwell B	99	99	Converted from Brinell
Hardness, Rockwell C	30	30	Converted from Brinell
Hardness, Vickers	301	301	Converted from Brinell
Tensile Strength, Ultimate	938 MPa	136000 psi
Tensile Strength, Yield	758 MPa @Strain 0.2 %	110000 psi @Strain 0.2 %
Elongation at Break	16 %	16 %	in 50mm.
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	70 %	70 %	hot rolled 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	0.0000219 ohm-cm	0.0000219 ohm-cm	Typical 5000 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	46.6 W/m-K	323 BTU-in/hr-ft²-°F	Typical steel

Component Elements Properties	Metric	English	Comments
Carbon, C	0.17 - 0.23 %	0.17 - 0.23 %
Chromium, Cr	0.60 - 1.0 %	0.60 - 1.0 %
Iron, Fe	97.395 - 98.48 %	97.395 - 98.48 %	As remainder
Manganese, Mn	0.60 - 1.0 %	0.60 - 1.0 %
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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M512BC / 8053

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