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AISI 4320 Steel, double quenched and tempered (carburized 925°C (1700°F) for 8hrs, pot cooled, reheated to 815°C (1500°F), quenched in agitated oil, reheated to 775°C, quenched in agitated oil, 150°C (300°F) temper), 1.9 mm case depth
Categories: Metal; Ferrous Metal; Alloy Steel; AISI 4000 Series Steel; Low Alloy Steel; Carbon Steel; Low Carbon Steel
Key Words: UNS G43200, ASTM A322, ASTM A331, ASTM A505, ASTM A519, ASTM A535
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Physical PropertiesOriginal ValueComments
Density 7.85 g/cc
 
Mechanical PropertiesOriginal ValueComments
Hardness, Brinell 302
Hardness, Knoop 328Converted from Brinell
Hardness, Rockwell B 99Converted from Brinell
Hardness, Rockwell C 62Case hardness
Hardness, Vickers 319Converted from Brinell
Tensile Strength, Ultimate 1050 MPa
Tensile Strength, Yield 670 MPa
Elongation at Break 19.5 %in 50 mm
Reduction of Area 49.4 %
Modulus of Elasticity 205 GPaTypical for steel
Bulk Modulus 160 GPaTypical for steels.
Poissons Ratio 0.29Calculated
Fracture Toughness 30.0 - 45.0 ksi-in½cracks originating in case; case depth 0.30 to 0.35 in.
 65.0 - 105 ksi-in½cracks originating in core
Machinability 60 %annealed and cold drawn. Based on 100% machinability for AISI 1212 steel.
Shear Modulus 80.0 GPaTypical for steels.
 
Electrical PropertiesOriginal ValueComments
Electrical Resistivity 0.0000245 ohm-cmTypical 4000 series steel
 
Thermal PropertiesOriginal ValueComments
CTE, linear 11.3 µm/m-°C
@Temperature -18.0 - 95.0 °C		condition of specimen unknown
Specific Heat Capacity 0.475 J/g-°CTypical 4000 series steel
Thermal Conductivity 44.5 W/m-KTypical steel
 
Component Elements PropertiesOriginal ValueComments
Carbon, C 0.17 - 0.22 %
Chromium, Cr 0.40 - 0.60 %
Iron, Fe 95.855 - 96.98 %As remainder
Manganese, Mn 0.45 - 0.65 %
Molybdenum, Mo 0.20 - 0.30 %
Nickel, Ni 1.65 - 2.0 %
Phosphorus, P <= 0.035 %
Silicon, Si 0.15 - 0.30 %
Sulfur, S <= 0.040 %

References for this datasheet.

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Users viewing this material also viewed the following:
AISI 4320 Steel, direct quench from pot (carburized 925°C (1700°F) for 8 hrs., quenched in agitated oil, 150°C (300°F) temper), 1.5 mm case depth
AISI 4320 Steel, single quenched and tempered (carburized 925°C (1700°F) for 8hrs, pot cooled, reheated to 830°C (1525°F), quenched in agitated oil, 150°C (300°F) temper)
AISI 4320 Steel, direct quench from pot (carburized 925°C (1700°F) for 8 hrs., quenched in agitated oil, 230°C (450°F) temper), 1.5 mm case depth
AISI 4320 Steel, single quenched and tempered (carburized 925°C (1700°F) for 8hrs, pot cooled, reheated to 815°C (1500°F), quenched in agitated oil, 230°C (450°F) temper), 1.9 mm case depth
AISI 4320 Steel, normalized at 895°C (1640°F)

M432AE / 7695




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