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Ensinger PEI

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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 PropertiesOriginal ValueComments
Density 7.85 g/cc
 
Mechanical PropertiesOriginal ValueComments
Hardness, Brinell 235
@Diameter 102 mm
 248
@Diameter 76.2 mm
 269
@Diameter 50.8 mm
 385
@Diameter 25.4 mm
Hardness, Knoop 259
@Diameter 102 mm		Converted from Brinell
 272
@Diameter 76.2 mm		Converted from Brinell
 294
@Diameter 50.8 mm		Converted from Brinell
 415
@Diameter 25.4 mm		Converted from Brinell
Hardness, Rockwell B 97
@Diameter 102 mm		Converted from Brinell
 98
@Diameter 76.2 mm		Converted from Brinell
 99
@Diameter 50.8 mm		Converted from Brinell
 101
@Diameter 25.4 mm		Converted from Brinell
Hardness, Rockwell C 21
@Diameter 102 mm		Converted from Brinell
 23
@Diameter 76.2 mm		Converted from Brinell
 27
@Diameter 50.8 mm		Converted from Brinell
 42
@Diameter 25.4 mm		Converted from Brinell
Hardness, Vickers 247
@Diameter 102 mm		Converted from Brinell
 261
@Diameter 76.2 mm		Converted from Brinell
 284
@Diameter 50.8 mm		Converted from Brinell
 408
@Diameter 25.4 mm		Converted from Brinell
Tensile Strength, Ultimate 807 MPa
@Diameter 102 mm
 855 MPa
@Diameter 76.2 mm
 903 MPa
@Diameter 50.8 mm
 972 MPa
@Diameter 25.4 mm
Tensile Strength, Yield 625 MPa
@Diameter 102 mm
 685 MPa
@Diameter 76.2 mm
 738 MPa
@Diameter 50.8 mm
 814 MPa
@Diameter 25.4 mm
Elongation at Break 19.2 %
@Diameter 25.4 mm		in 50 mm
 20.4 %
@Diameter 50.8 mm		in 50 mm
 21.5 %
@Diameter 76.2 mm		in 50 mm
 22 %
@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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M864CI / 8490

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