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Rulon Bearings

AISI 8650H Steel, oil quenched 800°C (1470°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
Material Notes: Post oil quenched hardness 61 HRC surface, 61 HRC half-radius, 61 HRC center.

Applications: torsion bar springs.
Key Words: UNS H86500, ASTM A304, SAE J1268
Vendors: No vendors are listed for this material. Please click here if you are a supplier and would like information on how to add your listing to this material.
 
Physical PropertiesMetricEnglishComments
Density 7.85 g/cc0.284 lb/in³
 
Mechanical PropertiesMetricEnglishComments
Hardness, Brinell  241
@Diameter 102 mm		241
@Diameter 4.00 in
 277
@Diameter 50.8 mm		277
@Diameter 2.00 in
 285
@Diameter 25.4 mm		285
@Diameter 1.00 in
 293
@Diameter 12.7 mm		293
@Diameter 0.500 in
Hardness, Knoop  265
@Diameter 102 mm		265
@Diameter 4.00 in		Converted from Brinell
 302
@Diameter 50.8 mm		302
@Diameter 2.00 in		Converted from Brinell
 311
@Diameter 25.4 mm		311
@Diameter 1.00 in		Converted from Brinell
 319
@Diameter 12.7 mm		319
@Diameter 0.500 in		Converted from Brinell
Hardness, Rockwell B  97
@Diameter 102 mm		97
@Diameter 4.00 in		Converted from Brinell
 99
@Diameter 12.7 mm		99
@Diameter 0.500 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
Hardness, Rockwell C  22
@Diameter 102 mm		22
@Diameter 4.00 in		Converted from Brinell
 28
@Diameter 50.8 mm		28
@Diameter 2.00 in		Converted from Brinell
 30
@Diameter 25.4 mm		30
@Diameter 1.00 in		Converted from Brinell
 31
@Diameter 12.7 mm		31
@Diameter 0.500 in		Converted from Brinell
Hardness, Vickers  254
@Diameter 102 mm		254
@Diameter 4.00 in		Converted from Brinell
 292
@Diameter 50.8 mm		292
@Diameter 2.00 in		Converted from Brinell
 301
@Diameter 25.4 mm		301
@Diameter 1.00 in		Converted from Brinell
 309
@Diameter 12.7 mm		309
@Diameter 0.500 in		Converted from Brinell
Tensile Strength, Ultimate  841 MPa
@Diameter 102 mm		122000 psi
@Diameter 4.00 in
 931 MPa
@Diameter 50.8 mm		135000 psi
@Diameter 2.00 in
 972 MPa
@Diameter 25.4 mm		141000 psi
@Diameter 1.00 in
 1020 MPa
@Diameter 12.7 mm		148000 psi
@Diameter 0.500 in
Tensile Strength, Yield  650 MPa
@Diameter 102 mm		94300 psi
@Diameter 4.00 in
 834 MPa
@Diameter 50.8 mm		121000 psi
@Diameter 2.00 in
 910 MPa
@Diameter 25.4 mm		132000 psi
@Diameter 1.00 in
 945 MPa
@Diameter 12.7 mm		137000 psi
@Diameter 0.500 in
Elongation at Break  18.5 %
@Diameter 12.7 mm		18.5 %
@Diameter 0.500 in		in 50 mm
 19.5 %
@Diameter 25.4 mm		19.5 %
@Diameter 1.00 in		in 50 mm
 21.2 %
@Diameter 50.8 mm		21.2 %
@Diameter 2.00 in		in 50 mm
 22.5 %
@Diameter 102 mm		22.5 %
@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 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 0.0000234 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 0.47 - 0.54 %0.47 - 0.54 %
Chromium, Cr 0.35 - 0.65 %0.35 - 0.65 %
Iron, Fe 96.33 - 97.83 %96.33 - 97.83 %As remainder
Manganese, Mn 0.70 - 1.05 %0.70 - 1.05 %
Molybdenum, Mo 0.15 - 0.25 %0.15 - 0.25 %
Nickel, Ni 0.35 - 0.75 %0.35 - 0.75 %
Phosphorus, P <= 0.035 %<= 0.035 %
Silicon, Si 0.15 - 0.35 %0.15 - 0.35 %
Sulfur, S <= 0.045 %<= 0.045 %

References for this datasheet.

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