8640 Hot Rolled SBQ Bar
8640 steel is known for its toughness and wear resistance, which is achieved after the low alloy steel has been carburized, or case hardened. Eaton Steel Bar Company stocks many diameters of 8640 hot rolled steel bars to meet the market demand. We supply AISI 8640 steel bars to various industries including oil & gas, automotive and military.
Typical applications for this grade of steel include forged tools, gears, axles, crankshafts and more. 8640 steel is usually heat treated and given an oil quench to reach maximum strength and hardness.
Shapes and Sizes
Eaton Steel Bar Company supplies 8640 steel bar in a variety of sizes ranging from 3/4”- 3”. The shapes available for this grade include:
- Rounded Cornered Square
Standard "8640 Grade" Chemical Composition
Estimated Mechanical Property Ranges for "Grade 8640"
|Tensile strength (psi)||90,000 - 100,000|
|Yield strength (psi)||65,000 - 75,000|
|Elongation in 2” (%)||15 - 25|
|Reduction of area (%)||30 - 40|
|Brinell Hardness (BHN)||180 - 210|