Hot-rolled steel logo identity: The initial of the hot rolled steel is H, hot rolled ribbed steel HRB335, HRB400 and so on.

Hot-rolled steel is processed directly in the steel plants in the steel furnace steel, is out of the oven is hot (so called "hot rolling") of the finished product, after cooling can be used. From low carbon steel and ordinary steel pressed at high temperature is mainly used for reinforcement of reinforced and prestressed concrete structures, it is one of the varieties of steel used in Civil Engineering largest.

6.5 to 9 mm diameter steel, most rolled into wire rod;

10 to 40 mm in diameter is generally from 6 to 12 meters long straight.

Hot-rolled steel grade is mainly based on: yield point elongation tensile strength of cold-formed. It is divided into hot-rolled and hot-rolled steel garden light ribbed steel two kinds. Hot-rolled steel is soft just, will produce large necking elongation at break.

Hot-rolled ribbed steel bar 1	Hot-rolled ribbed steel bar 2
Hot rolled plain round steel bar 4

Heattreated steel suitable for reinforcement of prestressed concrete members, but its strong sensitivity to stress corrosion and defects. Q235 hot rolled steel mainly rolled steel and light garden ribbed steel rolling two types of alloy steel, mainly used for reinforcement of reinforced concrete structures and prestressed reinforced concrete structures. Common non-prestressed reinforced concrete can be used Ⅰ grade steel or HRB335, HRB400 rebar according to the conditions of use; prestressing steel should be preferred HRB400 rebar, you can also use HRB335 rebar.

Hot-rolled steel in accordance with national standards are divided into four levels, I, II, III, IV level. Level to improve the strength (tensile strength and yield point) increase, plastic (elongation and cold-formed) decreased. I grade steel by the Q235 (low carbon steel) rolling from, for non-prestressed reinforcement; II, III grade steel is made of low-alloy steel rolling, applicable to non-prestressed reinforcement and prestressing steel; IV grade steel used made of high-quality steel rolling, the highest intensity, good quality, suitable for prestressing steel.

Hot-rolled steel can produce steel mesh, used for bridge strengthening, construction crack (can replace load-bearing wall), coal and other support. 

In accordance with the standard hot-rolled steel yield strength value distinction.

Hot rolled HPB300-- yield strength of ≧ 300Mpa.

Rolled ribbed HRB335, HRBF335-- yield strength ≧ 335Mpa.

HRB400, HRBF400, RRB400-- yield strength ≧ 400Mpa.

HRB500, HRBF500-- yield strength ≧ 500Mpa.