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AISI 8740H Steel, normalized 870°C (1600°F)
Categories:
Metal
;
Ferrous Metal
;
Alloy Steel
;
AISI 8000 Series Steel
;
Low Alloy Steel
;
Carbon Steel
;
Medium Carbon Steel
Key Words:
B.S. Type 7, UNS H87400, ASTM A304, SAE J1268, DIN 1.6546, UNI 40 NiCrMo 2 KB
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Physical Properties
Original Value
Comments
Density
7.85
g/cc
Mechanical Properties
Original Value
Comments
Hardness, Brinell
269
Hardness, Knoop
294
Converted from Brinell
Hardness, Rockwell B
99
Converted from Brinell
Hardness, Rockwell C
27
Converted from Brinell
Hardness, Vickers
284
Converted from Brinell
Tensile Strength, Ultimate
930
MPa
Tensile Strength, Yield
550
MPa
Elongation at Break
16 %
in 50 mm
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 100% machinability for AISI 1212 steel.
Shear Modulus
80.0
GPa
Typical for steel
Izod Impact
18.0
J
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
96.435 - 97.88 %
As remainder
Manganese, Mn
0.70 - 1.05 %
Molybdenum, Mo
0.20 - 0.30 %
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 8650 Steel, oil quenched 800°C (1470°F), 540°C (1000°F) temper, 13 mm (0.5 in.) round
AISI 8740 Steel, normalized 870°C (1600°F)
AISI E4340 H Steel, normalized, oil quenched and tempered
AISI 8630 Steel, normalized
AISI 8720 Steel
M874BA / 8593
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