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Rulon Bearings

AISI 8642 Steel, oil quenched 845°C (1550°F), 595°C (1100°F) temper, round
Categories: Metal; Ferrous Metal; Alloy Steel; AISI 8000 Series Steel; Low Alloy Steel; Carbon Steel; Medium Carbon Steel
Key Words: SAE J770, UNS G86420, ASTM A322, ASTM A331, ASTM A505, ASTM A519, SAE J404, SAE J412
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Physical PropertiesMetricEnglishComments
Density 7.85 g/cc0.284 lb/in³
 
Mechanical PropertiesMetricEnglishComments
Hardness, Brinell  262
@Diameter 102 mm		262
@Diameter 4.00 in
 277
@Diameter 76.2 mm		277
@Diameter 3.00 in
 306
@Diameter 50.8 mm		306
@Diameter 2.00 in
 321
@Diameter 25.4 mm		321
@Diameter 1.00 in
Hardness, Knoop  287
@Diameter 102 mm		287
@Diameter 4.00 in		Converted from Brinell
 302
@Diameter 76.2 mm		302
@Diameter 3.00 in		Converted from Brinell
 333
@Diameter 50.8 mm		333
@Diameter 2.00 in		Converted from Brinell
 348
@Diameter 25.4 mm		348
@Diameter 1.00 in		Converted from Brinell
Hardness, Rockwell B  98
@Diameter 102 mm		98
@Diameter 4.00 in		Converted from Brinell
 99
@Diameter 25.4 mm		99
@Diameter 1.00 in		Converted from Brinell
 99
@Diameter 50.8 mm		99
@Diameter 2.00 in		Converted from Brinell
 99
@Diameter 76.2 mm		99
@Diameter 3.00 in		Converted from Brinell
Hardness, Rockwell C  26
@Diameter 102 mm		26
@Diameter 4.00 in		Converted from Brinell
 28
@Diameter 76.2 mm		28
@Diameter 3.00 in		Converted from Brinell
 33
@Diameter 50.8 mm		33
@Diameter 2.00 in		Converted from Brinell
 35
@Diameter 25.4 mm		35
@Diameter 1.00 in		Converted from Brinell
Hardness, Vickers  276
@Diameter 102 mm		276
@Diameter 4.00 in		Converted from Brinell
 292
@Diameter 76.2 mm		292
@Diameter 3.00 in		Converted from Brinell
 323
@Diameter 50.8 mm		323
@Diameter 2.00 in		Converted from Brinell
 339
@Diameter 25.4 mm		339
@Diameter 1.00 in		Converted from Brinell
Tensile Strength, Ultimate  896 MPa
@Diameter 102 mm		130000 psi
@Diameter 4.00 in
 951 MPa
@Diameter 76.2 mm		138000 psi
@Diameter 3.00 in
 1040 MPa
@Diameter 50.8 mm		151000 psi
@Diameter 2.00 in
 1095 MPa
@Diameter 25.4 mm		158800 psi
@Diameter 1.00 in
Tensile Strength, Yield  731 MPa
@Diameter 102 mm		106000 psi
@Diameter 4.00 in
 786 MPa
@Diameter 76.2 mm		114000 psi
@Diameter 3.00 in
 834 MPa
@Diameter 50.8 mm		121000 psi
@Diameter 2.00 in
 945 MPa
@Diameter 25.4 mm		137000 psi
@Diameter 1.00 in
Elongation at Break  17.2 %
@Diameter 25.4 mm		17.2 %
@Diameter 1.00 in		in 50 mm
 18.2 %
@Diameter 50.8 mm		18.2 %
@Diameter 2.00 in		in 50 mm
 19.7 %
@Diameter 76.2 mm		19.7 %
@Diameter 3.00 in		in 50 mm
 20.6 %
@Diameter 102 mm		20.6 %
@Diameter 4.00 in		in 50 mm
Modulus of Elasticity 205 GPa29700 ksiTypical for steel
Bulk Modulus 160 GPa23200 ksiTypical for steel.
Poissons Ratio 0.290.29Calculated
Machinability 65 %65 %annealed and cold drawn. Based on AISI 1212 steel = 100%.
Shear Modulus 80.0 GPa11600 ksiTypical for steel
 
Electrical PropertiesMetricEnglishComments
Electrical Resistivity 0.0000234 ohm-cm0.0000234 ohm-cmTypical steel
 
Thermal PropertiesMetricEnglishComments
Specific Heat Capacity 0.475 J/g-°C0.114 BTU/lb-°FTypical steel
Thermal Conductivity 46.6 W/m-K323 BTU-in/hr-ft²-°FTypical steel
 
Component Elements PropertiesMetricEnglishComments
Carbon, C 0.40 - 0.45 %0.40 - 0.45 %
Chromium, Cr 0.40 - 0.60 %0.40 - 0.60 %
Iron, Fe 96.625 - 97.75 %96.625 - 97.75 %As remainder
Manganese, Mn 0.75 - 1.0 %0.75 - 1.0 %
Molybdenum, Mo 0.15 - 0.25 %0.15 - 0.25 %
Nickel, Ni 0.40 - 0.70 %0.40 - 0.70 %
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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