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Master Bond adhesives

AISI E4340 Steel, quenched 845°C, 540°C (1000°F) temper
Categories: Metal; Ferrous Metal; Alloy Steel; AISI 4000 Series Steel; Low Alloy Steel; Carbon Steel; Medium Carbon Steel
Material Notes: Transition temperature: -90°C

AISI E4340 has a favorable response to heat treatment (usually oil quenching followed by tempering) and exhibits a good combination of ductility and strength when treated thusly. Uses include piston pins, bearings, ordnance, gears, dies, and pressure vessels.
Key Words: alloy steels, UNS G43406, ASTM A304, ASTM A331, ASTM A505, ASTM A519
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Physical PropertiesMetricEnglishComments
Density 7.85 g/cc0.284 lb/in³
 
Mechanical PropertiesMetricEnglishComments
Hardness, Knoop 381381Converted from Rockwell C hardness.
Hardness, Rockwell C 3838
Hardness, Vickers 368368Converted from Rockwell C hardness.
Modulus of Elasticity 200 GPa29000 ksiAISI 4340
Bulk Modulus 159 GPa23100 ksiEstimated from elastic modulus
Poissons Ratio 0.290.29Typical for steel
Machinability 50 %50 %annealed and cold drawn. Based on 100% machinability for AISI 1212 steel.
Shear Modulus 78.0 GPa11300 ksiEstimated from elastic modulus
Charpy Impact  20.0 J
@Temperature -185 °C		14.8 ft-lb
@Temperature -301 °F
 24.0 J
@Temperature -130 °C		17.7 ft-lb
@Temperature -202 °F
 38.0 J
@Temperature -73.0 °C		28.0 ft-lb
@Temperature -99.4 °F
 47.0 J
@Temperature -18.0 °C		34.7 ft-lb
@Temperature -0.400 °F
 49.0 J
@Temperature 38.0 °C		36.1 ft-lb
@Temperature 100 °F
 
Electrical PropertiesMetricEnglishComments
Electrical Resistivity  0.0000248 ohm-cm
@Temperature 20.0 °C		0.0000248 ohm-cm
@Temperature 68.0 °F
 0.0000298 ohm-cm
@Temperature 100 °C		0.0000298 ohm-cm
@Temperature 212 °F
 0.0000552 ohm-cm
@Temperature 400 °C		0.0000552 ohm-cm
@Temperature 752 °F
 0.0000797 ohm-cm
@Temperature 600 °C		0.0000797 ohm-cm
@Temperature 1110 °F
 
Thermal PropertiesMetricEnglishComments
CTE, linear  11.3 µm/m-°C
@Temperature 20.0 °C		6.28 µin/in-°F
@Temperature 68.0 °F
 12.4 µm/m-°C
@Temperature 250 °C		6.89 µin/in-°F
@Temperature 482 °F
 13.7 µm/m-°C
@Temperature 500 °C		7.61 µin/in-°F
@Temperature 932 °F
Specific Heat Capacity 0.475 J/g-°C0.114 BTU/lb-°FTypical 4000 series steel
Thermal Conductivity 44.5 W/m-K309 BTU-in/hr-ft²-°FTypical steel
 
Component Elements PropertiesMetricEnglishComments
Carbon, C 0.38 - 0.43 %0.38 - 0.43 %
Chromium, Cr 0.70 - 0.90 %0.70 - 0.90 %
Iron, Fe 95.175 - 96.27 %95.175 - 96.27 %As remainder
Manganese, Mn 0.65 - 0.85 %0.65 - 0.85 %
Molybdenum, Mo 0.20 - 0.30 %0.20 - 0.30 %
Nickel, Ni 1.65 - 2.0 %1.65 - 2.0 %
Phosphorus, P <= 0.025 %<= 0.025 %
Silicon, Si 0.15 - 0.30 %0.15 - 0.30 %
Sulfur, S <= 0.020 %<= 0.020 %

References for this datasheet.

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M434DV / 7815




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