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AISI 4320 Steel, normalized 895°C (1640°F), air cooled, 100 mm (4 in.) round
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 PropertiesMetricEnglishComments
Density 7.85 g/cc0.284 lb/in³
 
Mechanical PropertiesMetricEnglishComments
Hardness, Brinell 201201
Hardness, Knoop 223223Converted from Brinell
Hardness, Rockwell B 9393Converted from Brinell
Hardness, Rockwell C 1313Converted from Brinell hardness. Value below normal HRC range, for comparison purposes only.
Hardness, Vickers 211211Converted from Brinell
Tensile Strength, Ultimate 703 MPa102000 psi
Tensile Strength, Yield 395 MPa57300 psi
Elongation at Break 22.3 %22.3 %in 50 mm
Reduction of Area 54.7 %54.7 %
Modulus of Elasticity 205 GPa29700 ksiTypical for steel
Bulk Modulus 160 GPa23200 ksiTypical for steel.
Poissons Ratio 0.290.29Calculated
Machinability 60 %60 %annealed and cold drawn. Based on 100% machinability for AISI 1212 steel.
Shear Modulus 80.0 GPa11600 ksiTypical for steel.
 
Electrical PropertiesMetricEnglishComments
Electrical Resistivity 0.0000245 ohm-cm0.0000245 ohm-cmTypical 4000 series steel
 
Thermal PropertiesMetricEnglishComments
CTE, linear 11.3 µm/m-°C
@Temperature -18.0 - 95.0 °C		6.28 µin/in-°F
@Temperature -0.400 - 203 °F		condition of specimen unknown
Specific Heat Capacity 0.475 J/g-°C0.114 BTU/lb-°FTypical 4000 series steel
Thermal Conductivity 44.5 W/m-K309 BTU-in/hr-ft²-°FTypical steel
 
Component Elements PropertiesMetricEnglishComments
Carbon, C 0.17 - 0.22 %0.17 - 0.22 %
Chromium, Cr 0.40 - 0.60 %0.40 - 0.60 %
Iron, Fe 95.855 - 96.98 %95.855 - 96.98 %As remainder
Manganese, Mn 0.45 - 0.65 %0.45 - 0.65 %
Molybdenum, Mo 0.20 - 0.30 %0.20 - 0.30 %
Nickel, Ni 1.65 - 2.0 %1.65 - 2.0 %
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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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, normalized 895°C (1640°F), air cooled, 50 mm (2 in.) round
AISI 4320 Steel, normalized 925°C (1700°F) in 32 mm rounds, machined to 13.7 mm rounds, pseudocarburized 925°C (1700°F) for 8 hrs., oil quenched, 150°C (300°F) temper, tested in 12.8 mm rounds
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, mock carburized 925°C (1700°F) for 8 hrs., reheated to 815°C (1500°F), oil quenched, 230°C (450°F) temper, 100 mm (4 in.) round

M432AU / 7711

Specialty Compounds RTP Company




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