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Product Details, Specifications, and Technical Information

Alloy Steel Round Bar 4140 Annealed Cold Finish, also referred to as Chromoly Steel, is known for strength, resistance to fracturing, abrasion, and impact in high stress applications. 4140 is popular for a wide range of applications and is ductile and easily machined in the annealed state. It is commonly used for gears, shafts, spindles, fixtures, bolts, valves, sprockets, pistons, and collars in various high-stress and heavy-duty applications.

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Dimension Name Specification
Diameter 0.6875
Max Length 144
MTR Availability Yes
Full Length true
Material Alloy Steel
Shape Bar-Round
Custom Cut Warehouse 1
Alloy 4140
Temper Annealed
Production Method Cold Finished
Material Specifications

This material meets the following specs: ASTM -A108

Weight/Lineal Foot
1.27 pounds
Please note that this data is to be used ONLY FOR REFERENCE, NOT FOR DESIGN, and by using it,you agree that any decisions you make regarding materials for your project are at your own discretion.
Mechanical Properties
Property Value
Density g/cm^3 8
Yield Tensile Strength KSI 60
Ultimate Tensile Strength KSI 95
Brinell Hardness 500 kg load 197
Rockwell Hardness B Scale 92
Elongation % in 2 in. 26
Shear Strength KSI 69
Machinability % 66
Electrical Conductivity % IACS 7
Melting Point °F 2580 - 2650
Chemistry Information: 4140 Alloy Steel
Element Percentage
C 0.38 - 0.43
Cr 0.8 - 1.1
Fe 96.785 - 97.84
Mn 0.7 - 1
Mo 0.15 - 0.25
P 0.035 max
S 0.04 max
Si 0.15 - 0.3
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