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Alloy Steel Square Bar 4142 Prehardened, also known as Chromoly Steel, offers good strength, wear resistance, ductility, and excellent toughness. It does not require heat treatment but also has poor weldability. 4142 is typically used for gears, shafts, spindles, fixtures, bolts, valves, sprockets, pistons, and collars in various high-stress and heavy-duty applications.

shape Image

Dimension Name


Alloy 4142
Height 0.3125
Max Length 36
Eniteo Vendor ID 3145
MTR Availability Yes
Material Alloy Steel
Shape Bar-Square
Custom Cut Warehouse 0
Material Specifications

This material meets the following specs: ASTM -A322

Weight/Lineal Foot

0.33 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: 4142 Alloy Steel

Element Percentage
Cr 0.8 - 1.1
Fe 96.8 - 97.8
Mn 0.75 - 1
Mo 0.15 - 0.25
C 0.4 - 0.45
Si 0.15 - 0.35
S 0 - 0.04
P 0 - 0.035
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