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Rulon Bearings

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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 PropertiesOriginal ValueComments
Density 7.85 g/cc
 
Mechanical PropertiesOriginal ValueComments
Hardness, Brinell 262
@Diameter 102 mm
 277
@Diameter 76.2 mm
 306
@Diameter 50.8 mm
 321
@Diameter 25.4 mm
Hardness, Knoop 287
@Diameter 102 mm		Converted from Brinell
 302
@Diameter 76.2 mm		Converted from Brinell
 333
@Diameter 50.8 mm		Converted from Brinell
 348
@Diameter 25.4 mm		Converted from Brinell
Hardness, Rockwell B 98
@Diameter 102 mm		Converted from Brinell
 99
@Diameter 25.4 mm		Converted from Brinell
 99
@Diameter 50.8 mm		Converted from Brinell
 99
@Diameter 76.2 mm		Converted from Brinell
Hardness, Rockwell C 26
@Diameter 102 mm		Converted from Brinell
 28
@Diameter 76.2 mm		Converted from Brinell
 33
@Diameter 50.8 mm		Converted from Brinell
 35
@Diameter 25.4 mm		Converted from Brinell
Hardness, Vickers 276
@Diameter 102 mm		Converted from Brinell
 292
@Diameter 76.2 mm		Converted from Brinell
 323
@Diameter 50.8 mm		Converted from Brinell
 339
@Diameter 25.4 mm		Converted from Brinell
Tensile Strength, Ultimate 896 MPa
@Diameter 102 mm
 951 MPa
@Diameter 76.2 mm
 1040 MPa
@Diameter 50.8 mm
 1095 MPa
@Diameter 25.4 mm
Tensile Strength, Yield 731 MPa
@Diameter 102 mm
 786 MPa
@Diameter 76.2 mm
 834 MPa
@Diameter 50.8 mm
 945 MPa
@Diameter 25.4 mm
Elongation at Break 17.2 %
@Diameter 25.4 mm		in 50 mm
 18.2 %
@Diameter 50.8 mm		in 50 mm
 19.7 %
@Diameter 76.2 mm		in 50 mm
 20.6 %
@Diameter 102 mm		in 50 mm
Modulus of Elasticity 205 GPaTypical for steel
Bulk Modulus 160 GPaTypical for steel.
Poissons Ratio 0.29Calculated
Machinability 65 %annealed and cold drawn. Based on AISI 1212 steel = 100%.
Shear Modulus 80.0 GPaTypical for steel
 
Electrical PropertiesOriginal ValueComments
Electrical Resistivity 0.0000234 ohm-cmTypical steel
 
Thermal PropertiesOriginal ValueComments
Specific Heat Capacity 0.475 J/g-°CTypical steel
Thermal Conductivity 46.6 W/m-KTypical steel
 
Component Elements PropertiesOriginal ValueComments
Carbon, C 0.40 - 0.45 %
Chromium, Cr 0.40 - 0.60 %
Iron, Fe 96.625 - 97.75 %As remainder
Manganese, Mn 0.75 - 1.0 %
Molybdenum, Mo 0.15 - 0.25 %
Nickel, Ni 0.40 - 0.70 %
Phosphorus, P <= 0.035 %
Silicon, Si 0.15 - 0.30 %
Sulfur, S <= 0.040 %

References for this datasheet.

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