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Product Details, Specifications, and Technical Information

Alloy Steel Hex Bar 4140/4142 Cold Finish, also referred to as Chromoly Steel, are known for strength, resistance to fracturing, abrasion, and impact in high stress applications. 4140 and 4142 are both popular for a wide range of applications and are mechanically extremely similar, both are ductile and easily machined in the annealed state. They are commonly used for gears, shafts, spindles, fixtures, bolts, valves, sprockets, pistons, and collars in various high-stress and heavy-duty applications.

shape Image
Dimension Name Specification
Max Length 144
Across Flats 1.25
Alloy 4140
Production Method Cold Finished
MTR Availability Yes
Full Length true
Material Alloy Steel
Shape Bar-Hex
Custom Cut Warehouse 1
Material Specifications

This material meets the following specs: ASTM -A108(Replaced ASTM-A331)

Weight/Lineal Foot
4.62 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.
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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