OVERVIEW SPECIFICATIONS AND TECHNICAL INFORMATION

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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

Alloy 4140
Temper Annealed
Production Method Cold Finish
Diameter 0.5
Max Length 144
MTR Availability Yes
Full Length true
Material Alloy Steel
Shape Bar-Round
Custom Cut Warehouse 1
Material Specifications

This material meets the following specs: ASTM -A108

Weight/Lineal Foot

0.67 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
Brinell Hardness 500 kg load 197
Density g/cm^3 7
Rockwell Hardness B Scale 92
Elongation Typical % 25
Melting Point °F 2580 - 2650
Modulus of Elasticity KSI x 10^3 29
Reduction of Area % 56
Specific Heat BTU/lb-°F (32-212F) 1
Thermal Conductivity BTU-in/hr-ft^2-°F 296
Yield Strength KSI 60
Tensile Strength KSI 95
Shear Strength KSI 69

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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