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Product Details, Specifications, and Technical Information

See Alloy Steel Tolerances

Alloy Steel Round Bar 4340 Normalized Cold Finish 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.

shape Image
Dimension Name Specification
Diameter 0.75
Max Length 144
Alloy 4340
Temper Normalized
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 -A322, AMS -6415, ASTM -A108, AMS -6484, ASTM -A29

Weight/Lineal Foot
1.5 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
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
Chemistry Information: 4340 Alloy Steel
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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