Which type of alloy steel is commonly used to manufacture bolts that are subjected to torsional stresses?

AISI 2330, which is classified as a medium-carbon alloy steel, is widely recognized and utilized for manufacturing bolts that must withstand torsional stresses. This type of steel is known for its excellent strength and toughness, making it suitable for applications that demand high mechanical performance under load.

The properties of AISI 2330 can be enhanced through heat treatment, allowing the steel to achieve higher hardness and improved fatigue resistance, both of which are essential for ensuring reliability in threaded fasteners experiencing significant twisting or torsional loads. Such conditions are common in mechanical assemblies where bolts hold components together while subjected to dynamic forces.

In contrast, other alloy steels presented, such as AISI 3141, AISI 4830, and AISI 4310, possess different compositions and characteristics that may not provide the same level of performance under torsional stresses. AISI 3141 is typically used for applications requiring good ductility but may lack the necessary tensile strength for high-stress scenarios. AISI 4830 offers properties that can be beneficial for other types of applications but is not specifically optimized for torsional stresses. AISI 4310, although it has good strength and hardenability, is more commonly used in applications like gears and shafts rather