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Ensinger PEI

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AISI 8640 Steel, oil quenched 845°C (1550°F), 650°C (1200°F) temper, 50 mm (2 in.) round
Categories: Metal; Ferrous Metal; Alloy Steel; AISI 8000 Series Steel; Low Alloy Steel; Carbon Steel; Medium Carbon Steel

Key Words: SAE J404, SAE J412, SAE J770, DIN 1.6546, UNI 40 NiCrMo 2 KB, B.S. Type 7, UNS G86400, ASTM A322, ASTM A331, ASTM A505, ASTM A519, MIL-SPEC MIL-S-16974, ISO 683-12 10, ISO 683/VIII 1, ISO 683/VIII 1a, ISO 683/VIII 1b, ISO R683-8 1a, ISO R683-8 1b
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Physical PropertiesOriginal ValueComments
Density 7.85 g/cc
 
Mechanical PropertiesOriginal ValueComments
Hardness, Brinell 221
Hardness, Knoop 244Converted from Brinell
Hardness, Rockwell B 95Converted from Brinell
Hardness, Rockwell C 18Converted from Brinell hardness. Value below normal HRC range, for comparison only.
Hardness, Vickers 232Converted from Brinell
Tensile Strength, Ultimate 848 MPa
Tensile Strength, Yield 717 MPa
Elongation at Break 19 %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 0.38 - 0.43 %
Chromium, Cr 0.40 - 0.60 %
Iron, Fe 96.645 - 97.77 %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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AISI 8640 Steel, oil quenched 845°C (1550°F), 650°C (1200°F) temper, 25 mm (1 in.) round

M864AJ / 8470

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