AISI 4027 Steel, water quenched 865°C (1590°F), 595°C (1100°F) temper, 25 mm (1 in.) round

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AISI 4027 Steel, water quenched 865°C (1590°F), 595°C (1100°F) temper, 25 mm (1 in.) round
Categories:	Metal; Ferrous Metal; Alloy Steel; AISI 4000 Series Steel; Low Alloy Steel; Carbon Steel; Low Carbon Steel
Material Notes:	As quenched hardness: 50 HRC surface, 47 HRC 1/2 radius, 44 HRC center.
Key Words:	UNS G40270, ASTM A322, ASTM A331, ASTM A519, SAE J404, SAE J412, SAE J770, alloy 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	229	229
Hardness, Knoop	252	252	Converted from Brinell
Hardness, Rockwell B	96	96	Converted from Brinell
Hardness, Rockwell C	19	19	Converted from Brinell hardness. Value below normal HRC range, for comparison purposes only.
Hardness, Vickers	241	241	Converted from Brinell
Tensile Strength, Ultimate	786 MPa	114000 psi
Tensile Strength, Yield	640 MPa	92800 psi
Elongation at Break	23 %	23 %	in 50 mm
Reduction of Area	67.6 %	67.6 %
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 %	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	0.25 - 0.30 %	0.25 - 0.30 %
Iron, Fe	98.08 - 98.7 %	98.08 - 98.7 %	As remainder
Manganese, Mn	0.70 - 0.90 %	0.70 - 0.90 %
Molybdenum, Mo	0.20 - 0.30 %	0.20 - 0.30 %
Phosphorus, P	<= 0.035 %	<= 0.035 %
Silicon, Si	0.15 - 0.35 %	0.15 - 0.35 %
Sulfur, S	<= 0.040 %	<= 0.040 %

References for this datasheet.

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M4027O / 7449

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