Alloy Steel Rectangle Bar 4340 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:

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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.
Thickness
1.25
Width
6
Max Length
144
Alloy
4340
Metal Type
Alloy Steel
Shape
Bar-Rectangle
Yes
RoHS
Yes 6C
REACH
No
Custom Cut Warehouse
1
Weight/Lineal Foot
25.56 pounds
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Mechanical Properties

Density g/cm^3
8
Yield Tensile Strength KSI
63
Brinell Hardness 500 kg load
197
Ultimate Tensile Strength KSI
97
Rockwell Hardness B Scale
92
Elongation % in 2 in.
26
Melting Point °F
2590 - 2660
Shear Strength KSI
62
Electrical Conductivity % IACS
7
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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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