Alloy Steel Round Bar 4340 Normalized Rough Turned has high strength, toughness, wear resistance, and fatigue strength. It can be machined in all states other than hardened and it is easily welded. Additionally, 4340 can be cold worked easily in the annealed state. It is typically used in military aircraft, automotive systems, hydraulic parts, machine tools, and a steel crankshafts.

MTR MTR Available
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Product Information

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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
4
Max Length
144
Alloy
4340
Temper
Normalized
Production Method
Rough Turned
Metal Type
Alloy Steel
Shape
Bar-Round
Yes
RoHS
Yes 6C
REACH
No
Custom Cut Warehouse
1
Weight/Lineal Foot
42.66 pounds
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Mechanical Properties

Ultimate Tensile Strength KSI
186
Yield Tensile Strength KSI
125
Density g/cm^3
8
Elongation % in 2 in.
12
Rockwell Hardness C Scale
100
Melting Point °F
2580 - 2650
Shear Strength KSI
110
Brinell Hardness 3000 kg load
363
Electrical Conductivity % IACS
8
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Chemistry Information : 4340 Alloy Steel

Element
Percentage
Element
Percentage
Element
Percentage
C
0.37 - 0.43
Cr
0.8
Fe
96
Mn
0.7
Ni
1.83
P
0.035  max
S
0.04  max
Si
0.23
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