What is the difference between the price, toughness and yield of HPB, HRB and RRB steel bars at the same level?

HPB235 (hot rolled round bar), hot rolled round bar, also called Q235.

HRB335 (hot rolled ribbed bar), hot rolled ribbed bar, also called 20MnSi.

HRB400 (hot rolled ribbed bar), hot rolled ribbed bar.

RRB400 (waste heat treated ribbed steel bar), waste heat treated steel bar.

Grade HPB235: stable quality, good plasticity, easy to form, but low yield strength, not suitable for steel bars in structures;

HRB335 grade: Ribbed steel bars are beneficial to bond with concrete, and have good strength and plasticity, so they are one of the main types of steel bars used at present.

HRB400 grade: Ribbed reinforcement is beneficial to bond with concrete, and has good strength and plasticity, so it is one of the main reinforcement varieties to be used in the future.

RRB400 grade: HRB335 steel bar is rapidly cooled after hot rolling, and tempered by the internal temperature of steel bar. The strength of quenched steel bars is improved, but the plasticity is reduced, and the plasticity is improved after waste heat treatment. Production conditions are limited, and the current output is limited.

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