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AISI 4140H Steel, normalized at 870°C (1600°F), air cooled, 13 mm (0.5 in.) round
Categories: Metal; Ferrous Metal; Alloy Steel; AISI 4000 Series Steel; Low Alloy Steel; Carbon Steel; Medium Carbon Steel
Material Notes: Normalized (heated to 870°C, air cooled)
Key Words: AFNOR 40 CD 4, AFNOR 42 CD 4, JIS SCM 4 H, JIS SCM440, SS14 2244 (Sweden), B.S. 708 A 42 (UK), B.S. 708 M 40 (UK), B.S. 709 M 40 (UK), UNS H41400, ASTM A304, SAE J1268, DIN 1.7225
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Physical PropertiesOriginal ValueComments
Density 7.85 g/cc
 
Mechanical PropertiesOriginal ValueComments
Hardness, Brinell 302
Hardness, Knoop 328Converted from Brinell
Hardness, Rockwell B 99Converted from Brinell
Hardness, Rockwell C 32Converted from Brinell
Hardness, Vickers 319Converted from Brinell
Tensile Strength, Ultimate 1020 MPa
Tensile Strength, Yield 675 MPa
Elongation at Break 17.8 %
Reduction of Area 48.2 %
Modulus of Elasticity 205 GPaTypical for steel
Bulk Modulus 160 GPaTypical for steels.
Poissons Ratio 0.29Calculated
Machinability 65 %Based on AISI 1212 as 100% machinability.
Shear Modulus 80.0 GPaTypical for steels.
 
Electrical PropertiesOriginal ValueComments
Electrical Resistivity 0.0000220 ohm-cm
@Temperature 20.0 °C		specimen hardened and tempered
 0.0000263 ohm-cm
@Temperature 100 °C		specimen hardened and tempered
 0.0000326 ohm-cm
@Temperature 200 °C		specimen hardened and tempered
 0.0000475 ohm-cm
@Temperature 400 °C		specimen hardened and tempered
 0.0000646 ohm-cm
@Temperature 600 °C		specimen hardened and tempered
 
Thermal PropertiesOriginal ValueComments
CTE, linear 12.2 µm/m-°C
@Temperature 0.000 - 100 °C
 13.7 µm/m-°C
@Temperature 20.0 - 400 °C
 14.6 µm/m-°C
@Temperature 20.0 - 600 °C
Specific Heat Capacity 0.473 J/g-°C
@Temperature 150 - 200 °C
 0.519 J/g-°C
@Temperature 350 - 400 °C
 0.561 J/g-°C
@Temperature 550 - 600 °C
Thermal Conductivity 42.6 W/m-K
 
Component Elements PropertiesOriginal ValueComments
Carbon, C 0.37 - 0.44 %
Chromium, Cr 0.75 - 1.2 %
Iron, Fe 96.585 - 97.93 %As remainder
Manganese, Mn 0.65 - 1.1 %
Molybdenum, Mo 0.15 - 0.30 %
Phosphorus, P <= 0.035 %
Silicon, Si 0.15 - 0.30 %
Sulfur, S <= 0.040 %

References for this datasheet.

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Users viewing this material also viewed the following:
AISI 4140 Steel, normalized at 870°C (1600°F), air cooled, 13 mm (0.5 in.) round
AISI 4140H Steel, oil quenched 845°C (1550°F), tempered 540°C (1000°F), 13 mm (0.5 in.) round
AISI 4140 Steel, annealed at 815°C (1500°F) furnace cooled 11°C (20°F)/hour to 665°C (1230°F), air cooled, 25 mm (1 in.) round
Overview of materials for AISI 4000 Series Steel
AISI 4140 Steel, normalized at 870°C (1600°F), reheated to 845°C (1550°F), oil quenched, 205°C (400°F) temper, 25 mm (1 in.) round

M414AH / 7567




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