HPB300/HRB335 are mainstream Chinese national standard hot-rolled concrete reinforcement rebars, with distinct performance characteristics. HPB300 is a plain round low-carbon steel rebar featuring excellent plasticity and ductility, ideal for light reinforcement. HRB335 is a ribbed rebar with higher tensile strength and superior bonding performance with concrete. Both have good weldability and cold workability, complete standard diameters, stable mechanical properties and high cost-effectiveness, serving as core materials for general concrete structure reinforcement in construction.