How to classify steel bars?


We all know that there are many kinds of steel bars, and they are different in application. In this article, we classify the reinforcement according to multiple dimensions, which helps us to have a deeper understanding of the classification and application of reinforcement.

According to the rolling shape, it can be divided into:

  1. Smooth steel bar: Grade I steel bar (q300 steel bar) is rolled into a smooth round section, and the supplied form is round, with a diameter no more than 10 mm and length of 6 m ~ 12 M.
  2. Ribbed steel bar: spiral, herringbone, and crescent shape. Generally, grade II and III steel bars are rolled into adult shape, and grade IV steel bars are rolled into spiral and crescent shapes.
  3. Steel wire (including low carbon steel wire and carbon steel wire) and steel strand.
  4. Cold rolled and twisted steel bar: cold rolled and cold twisted.

According to the rolling process, it can be divided into:

1. Hot rolled steel bar

Hot rolled steel bars are 6.5-9 mm in diameter, most of which are rolled into coils; those with diameters of 10-40 mm are generally 6-12 m long straight bars. Hot rolled steel bars should have a certain strength, namely yield point and tensile strength, which is the main basis of the structural design. It can be divided into a hot-rolled round steel bar and a hot-rolled ribbed steel bar. Hot rolled steel bar is soft and rigid, and the necking phenomenon will occur when fracture and the elongation are large.

Hot rolled steel bar is the finished steel bar formed by hot rolling and naturally cooled. It is made of low carbon steel and common alloy steel under high temperatures. It is mainly used for reinforcement of reinforced concrete and prestressed concrete structure and is one of the most widely used steel products in civil engineering.

UKO provides hot mill rolls for hot rolled steel bars, including cemented carbide hot mill rolls and HSS mill rolls. Hot mill roll is one of the important parts of hot milling, and its quality is an important factor affecting rolling efficiency and rolling safety.

2. Cold rolled steel bar

The bond anchorage performance between cold-rolled ribbed bars and concrete is good. Therefore, when used in the component, the phenomenon of cracking in the anchorage zone and steel wire sliding is eliminated fundamentally, and the bearing capacity and crack resistance capacity of the end of the component are improved; in a reinforced concrete structure, the crack width is also smaller than that of the plain round steel bar, even than that of the hot-rolled ribbed bar.

The elongation of a cold-rolled ribbed steel bar is larger than that of the same kind of cold-working steel, which is used in the cast-in-place concrete structure of residential and public buildings.

UKO provides carbide cold rolls for cold-rolled bars. Tungsten carbide cold rolls, also tungsten carbide roller is including Profiling rolls, Oval reducing rolls, Round reducing rolls, Forming rolls, Sizing rolls.

Full mold and ready blanks for regular dimension, orders can be delivered in a short time. UKO has exported carbide products to 48 countries and has built cooperation with more than 200+ customers.

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