AISI 4118 Steel, normalized at 910°C (1670°F), air cooled, 14 mm (0.55 in.) round

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AISI 4118 Steel, normalized at 910°C (1670°F), air cooled, 14 mm (0.55 in.) round
Categories:	Metal; Ferrous Metal; Alloy Steel; AISI 4000 Series Steel; Low Alloy Steel; Carbon Steel; Low Carbon Steel
Material Notes:	Normalized: heated to 910°C (1670°F), air cooled. Oil quenched. Forging temp.: 1230°C (2250°F) max. Carburizing temp.: 885 - 925°C. Hardening temp.: 830°C. Tempering temp.: 120 - 185°C.
Key Words:	alloy steels, UNS G41180, ASTM A322, ASTM A331, ASTM A505, ASTM A519
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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	170	170
Hardness, Knoop	191	191	Converted from Brinell
Hardness, Rockwell B	86	86	Converted from Brinell
Hardness, Vickers	178	178	Converted from Brinell
Tensile Strength, Ultimate	586 MPa	85000 psi
Tensile Strength, Yield	393 MPa	57000 psi
Elongation at Break	31.5 %	31.5 %	in 50 mm
Reduction of Area	70.1 %	70.1 %
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	60 %	60 %	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	0.0000245 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 %
Chromium, Cr	0.40 - 0.60 %	0.40 - 0.60 %
Iron, Fe	97.7 - 98.49 %	97.7 - 98.49 %	As remainder
Manganese, Mn	0.70 - 0.90 %	0.70 - 0.90 %
Molybdenum, Mo	0.080 - 0.15 %	0.080 - 0.15 %
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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M4118B / 7462

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