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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Product Information

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Please note:

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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.
Diameter
35
Max Length
72
Alloy
4140
Temper
Annealed
Production Method
TGP
Metal Type
Alloy Steel
Shape
Bar-Round
Yes
Eniteo Vendor ID
1961
Custom Cut Warehouse
0
Weight/Lineal Foot
30.43 pounds
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Mechanical Properties

Density g/cm^3
8
Brinell Hardness 500 kg load
197
Rockwell Hardness B Scale
92
Ultimate Tensile Strength KSI
95
Yield Tensile Strength KSI
60
Elongation % in 2 in.
26
Melting Point °F
2580 - 2650
Shear Strength KSI
69
Electrical Conductivity % IACS
7
Machinability %
66
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Chemistry Information : 4140 Alloy Steel

Element
Percentage
Element
Percentage
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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