AISI 4419 Steel, double quenched, 230°C (450°F) temper

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AISI 4419 Steel, double quenched, 230°C (450°F) temper
Categories:	Metal; Ferrous Metal; Alloy Steel; AISI 4000 Series Steel; Low Alloy Steel; Carbon Steel; Low Carbon Steel
Material Notes:	Carburized 925°C (1700°F) for 8 hrs., pot cooled, reheated to 855°C (1570°F), quenched in agitated oil, reheated to 830°C (1525°F), quenched in agitated oil, 230°C (450°F) temper; 1.8 mm case depth.
Key Words:	UNS G44190, ASTM A322, ASTM A331, SAE J404, SAE J412, SAE J770
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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	201	201
Hardness, Knoop	223	223	Converted from Brinell
Hardness, Rockwell B	93	93	Converted from Brinell
Hardness, Rockwell C	13	13
Hardness, Vickers	211	211	Converted from Brinell
Tensile Strength, Ultimate	679 MPa	98500 psi
Tensile Strength, Yield	376 MPa	54500 psi
Elongation at Break	23.4 %	23.4 %	in 50 mm.
Reduction of Area	59.7 %	59.7 %
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	65 %	65 %	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	0.18 - 0.23 %	0.18 - 0.23 %
Iron, Fe	98.095 - 98.77 %	98.095 - 98.77 %	As remainder
Manganese, Mn	0.45 - 0.65 %	0.45 - 0.65 %
Molybdenum, Mo	0.45 - 0.60 %	0.45 - 0.60 %
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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M419AS / 7671

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