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AISI 8640H Steel, quenched 845°C (1550°F), 540°C (1000°F) temper
Categories:
Metal
;
Ferrous Metal
;
Alloy Steel
;
AISI 8000 Series Steel
;
Low Alloy Steel
;
Carbon Steel
;
Medium Carbon Steel
Material Notes:
Transition temperature: -79°C (50% brittle)
Key Words:
B.S. Type 7, UNS H86400, ASTM A304, SAE J1268, DIN 1.6546, UNI 40 NiCrMo 2 KB, 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 Properties
Original Value
Comments
Density
7.85
g/cc
Mechanical Properties
Original Value
Comments
Hardness, Knoop
381
Converted from Rockwell C hardness.
Hardness, Rockwell C
38
Hardness, Vickers
368
Converted from Rockwell C hardness.
Modulus of Elasticity
205
GPa
Typical for steel
Bulk Modulus
160
GPa
Typical for steel.
Poissons Ratio
0.29
Calculated
Machinability
65 %
annealed and cold drawn. Based on AISI 1212 steel = 100%.
Shear Modulus
80.0
GPa
Typical for steel
Charpy Impact
15.0
J
@Temperature -185 °C
20.0
J
@Temperature -130 °C
33.0
J
@Temperature -73.0 °C
54.0
J
@Temperature -18.0 °C
54.0
J
@Temperature 38.0 °C
Electrical Properties
Original Value
Comments
Electrical Resistivity
0.0000234
ohm-cm
Typical steel
Thermal Properties
Original Value
Comments
Specific Heat Capacity
0.475
J/g-°C
Typical steel
Thermal Conductivity
46.6
W/m-K
Typical steel
Component Elements Properties
Original Value
Comments
Carbon, C
0.37 - 0.44 %
Chromium, Cr
0.35 - 0.65 %
Iron, Fe
96.485 - 97.93 %
As remainder
Manganese, Mn
0.70 - 1.05 %
Molybdenum, Mo
0.15 - 0.25 %
Nickel, Ni
0.35 - 0.75 %
Phosphorus, P
<= 0.035 %
Silicon, Si
0.15 - 0.30 %
Sulfur, S
<= 0.040 %
References
for this datasheet.
Some of the values displayed above may have been converted from their original units and/or rounded in order to display the information in a consistent format. Users requiring more precise data for scientific or engineering calculations can click on the property value to see the original value as well as raw conversions to equivalent units. We advise that you only use the original value or one of its raw conversions in your calculations to minimize rounding error. We also ask that you refer to MatWeb's
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Users viewing this material also viewed the following:
AISI 8640 Steel, oil quenched 845°C (1550°F), 650°C (1200°F) temper, 50 mm (2 in.) round
AISI 8640 Steel, oil quenched 845°C (1550°F), 650°C (1200°F) temper, 100 mm (4 in.) round
AISI 8640 Steel, oil quenched 845°C (1550°F), 540°C (1000°F) temper, 75 mm round
AISI 8640 Steel, oil quenched 845°C (1550°F), 540°C (1000°F) temper, 50 mm (2 in.) round
AISI 8640 Steel, oil quenched 845°C (1550°F), 540°C (1000°F) temper, 25 mm (1 in.) round
M864BB / 8474
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