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A36 steel bars are widely used in construction for manufacturing building steel frame connectors, beam supports, and prefabricated structural fasteners, as their good strength and weldability ensure stable performance of building structures. In machinery manufacturing, they are applied to produce equipment bases, non-high-load transmission shafts, and bracket components, benefiting from easy machinability and forming. They also find use in the automotive industry (for low-stress chassis accessories and truck carriage frame rods), the agricultural machinery sector (for tractor chassis parts and harvester support rods), and infrastructure projects (for guardrail uprights, street lamp pole cores, and small bridge auxiliary components), serving as a cost-effective material for general industrial and civil scenarios requiring reliable basic mechanical properties.