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Master Bond adhesives

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AISI 8740 Steel, oil quenched 830°C (1525°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

Material Notes: Post oil quenched hardness 52 HRC surface, 49 HRC half-radius, 45 HRC center

Key Words: DIN 1.6546, UNI 40 NiCrMo 2 KB, B.S. Type 7, ASTM A331, ASTM A505, ASTM A519, MIL-SPEC MIL-S-6049, SAE J404, SAE J412, SAE J770, UNS G87400, AMS 6322, AMS 6323, AMS 6325, AMS 6327, AMS 6358, ASTM A322
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Physical PropertiesOriginal ValueComments
Density 7.85 g/cc
 
Mechanical PropertiesOriginal ValueComments
Hardness, Brinell 255
Hardness, Knoop 279Converted from Brinell
Hardness, Rockwell B 98Converted from Brinell
Hardness, Rockwell C 25Converted from Brinell
Hardness, Vickers 269Converted from Brinell
Tensile Strength, Ultimate 876 MPa
Tensile Strength, Yield 731 MPa
Elongation at Break 21.5 %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 100% machinability for AISI 1212 steel.
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 96.595 - 97.72 %As remainder
Manganese, Mn 0.75 - 1.0 %
Molybdenum, Mo 0.20 - 0.30 %
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 8740 Steel, oil quenched 830°C (1525°F), 540°C (1000°F) temper, 50 mm (2 in.) round
AISI 8740 Steel, oil quenched 830°C (1525°F), 595°C (1100°F) temper, 50 mm (2 in.) round

M874AR / 8591

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