S235JR steel bars are widely used in construction for manufacturing building steel frame support rods, beam-column connecting fasteners, and prefabricated structural components, as their stable mechanical properties and good weldability ensure the safety and stability of building structures. In machinery manufacturing, they are applied to produce equipment bases, non-high-load transmission shafts, and bracket parts, benefiting from easy cutting, drilling, and forming. They also find use in the automotive industry (for low-stress chassis accessories and light truck carriage frame rods), the agricultural machinery sector (for tractor chassis supports and harvester auxiliary rods), and municipal infrastructure (for street lamp pole cores, guardrail uprights, and small-scale bridge auxiliary components), serving as a cost-effective choice for general industrial and civil scenarios requiring reliable basic structural performance.