Product Details, Specifications, and Technical Information
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.

Dimension Name | Specification |
Thickness | 2 |
Width | 6 |
Max Length | 144 |
MTR Availability | Yes |
Material | Alloy Steel |
Shape | Bar-Rectangle |
Custom Cut Warehouse | 0 |
Alloy | 4340 |
Temper | Normalized |
Production Method | Hot Rolled |
This material meets the following specs: ASTM -A322, AMS -6415, ASTM -A108, AMS -6409, AMS -6484
Weight/Lineal Foot | ||
40.75 pounds |
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 |