5/16" Alloy Steel Round Bar 4340-Normalized Cold Finish

Product Details, Specifications, and Technical Information

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.

Dimension Name	Specification
Diameter	0.3125
Max Length	144
Alloy	4340
Temper	Normalized
Production Method	Cold Finish
MTR Availability	Yes
Material	Alloy Steel
Shape	Bar-Round
Custom Cut Warehouse	1

Weight/Lineal Foot
0.26 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	245
Rockwell Hardness B Scale	100
Density g/cm^3	7
Elongation Typical %	12
Melting Point °F	2580 - 2650
Modulus of Elasticity KSI x 10^3	29
Reduction of Area %	36
Specific Heat BTU/lb-°F (32-212F)	1
Tensile Strength KSI	185
Thermal Conductivity BTU-in/hr-ft^2-°F	309
Yield Strength KSI	125
Shear Strength KSI	110

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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0.3125" Alloy Steel Round Bar 4340-Normalized Cold Finish -Part #: 23268

Product Details, Specifications, and Technical Information