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Rulon Bearings

AISI 8642 Steel, oil quenched 845°C (1550°F), 650°C (1200°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  235
@Diameter 102 mm		235
@Diameter 4.00 in
 248
@Diameter 76.2 mm		248
@Diameter 3.00 in
 269
@Diameter 50.8 mm		269
@Diameter 2.00 in
 385
@Diameter 25.4 mm		385
@Diameter 1.00 in
Hardness, Knoop  259
@Diameter 102 mm		259
@Diameter 4.00 in		Converted from Brinell
 272
@Diameter 76.2 mm		272
@Diameter 3.00 in		Converted from Brinell
 294
@Diameter 50.8 mm		294
@Diameter 2.00 in		Converted from Brinell
 415
@Diameter 25.4 mm		415
@Diameter 1.00 in		Converted from Brinell
Hardness, Rockwell B  97
@Diameter 102 mm		97
@Diameter 4.00 in		Converted from Brinell
 98
@Diameter 76.2 mm		98
@Diameter 3.00 in		Converted from Brinell
 99
@Diameter 50.8 mm		99
@Diameter 2.00 in		Converted from Brinell
 101
@Diameter 25.4 mm		101
@Diameter 1.00 in		Converted from Brinell
Hardness, Rockwell C  21
@Diameter 102 mm		21
@Diameter 4.00 in		Converted from Brinell
 23
@Diameter 76.2 mm		23
@Diameter 3.00 in		Converted from Brinell
 27
@Diameter 50.8 mm		27
@Diameter 2.00 in		Converted from Brinell
 42
@Diameter 25.4 mm		42
@Diameter 1.00 in		Converted from Brinell
Hardness, Vickers  247
@Diameter 102 mm		247
@Diameter 4.00 in		Converted from Brinell
 261
@Diameter 76.2 mm		261
@Diameter 3.00 in		Converted from Brinell
 284
@Diameter 50.8 mm		284
@Diameter 2.00 in		Converted from Brinell
 408
@Diameter 25.4 mm		408
@Diameter 1.00 in		Converted from Brinell
Tensile Strength, Ultimate  807 MPa
@Diameter 102 mm		117000 psi
@Diameter 4.00 in
 855 MPa
@Diameter 76.2 mm		124000 psi
@Diameter 3.00 in
 903 MPa
@Diameter 50.8 mm		131000 psi
@Diameter 2.00 in
 972 MPa
@Diameter 25.4 mm		141000 psi
@Diameter 1.00 in
Tensile Strength, Yield  625 MPa
@Diameter 102 mm		90600 psi
@Diameter 4.00 in
 685 MPa
@Diameter 76.2 mm		99400 psi
@Diameter 3.00 in
 738 MPa
@Diameter 50.8 mm		107000 psi
@Diameter 2.00 in
 814 MPa
@Diameter 25.4 mm		118000 psi
@Diameter 1.00 in
Elongation at Break  19.2 %
@Diameter 25.4 mm		19.2 %
@Diameter 1.00 in		in 50 mm
 20.4 %
@Diameter 50.8 mm		20.4 %
@Diameter 2.00 in		in 50 mm
 21.5 %
@Diameter 76.2 mm		21.5 %
@Diameter 3.00 in		in 50 mm
 22 %
@Diameter 102 mm		22 %
@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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M864CI / 8490

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