Product Description
There are mainly two types of steel bars, hot-rolled and cold-rolled, and most common steel bars are hot-rolled steel bars. Hot-rolled steel bars are finished steel bars that have been heated, rolled and formed and cooled naturally. Such as hot-rolled ribbed steel bar, hot-rolled smooth round steel bar. Cold-rolled steel bars are cold-formed steel bars on the basis of hot-rolled steel bars (mainly hot-rolled round wire rods). Such as cold-rolled ribbed steel bars, steel strands, etc. According to the rolling shape of hot-rolled steel bars, it can be divided into two categories: smooth round steel bars and ribbed steel bars. In actual use, steel bars are often divided into four grades according to their strength grades. Among them, Class I, Class II, and Class III hot-rolled steel bars are often used in non-prestressed reinforced concrete, and Class IV steel bars are often used in prestressed reinforced concrete because of their high strength and lower plastic deformation capacity than Class I~III steel bars. . Class I steel bar is a smooth round steel bar rolled by ordinary carbon steel such as killed steel, semi-killed steel or boiling steel. It belongs to low-strength steel bar, which has the characteristics of good plasticity, high elongation (above 25%), easy bending and forming, and easy welding. It has a wide range of applications, and can be used as the main stress reinforcement of medium and small reinforced concrete structures, stirrups of components, tie rods of steel and wood structures, etc. Hot-rolled round wire rod steel bars can also be used as raw materials for cold-drawn low-carbon steel wires and cold-rolled ribbed steel bars.
Classification of steel rebars
There are many types of rebar, usually classified by chemical composition, production process, rolling shape, supply form, diameter size, and use in the structure:
1. According to the diameter
Steel wire (diameter 3~5mm), thin steel bar (diameter 6~10mm), thick steel bar (diameter greater than 22mm).
2. According to mechanical properties
Class I rebar (300/420); Class II rebar (335/455); Class III rebar (400/540) and Class IV (500/630)
3. According to the production process
Hot-rolled, cold-rolled, cold-drawn steel bars, as well as heat-treated steel bars made of grade IV steel bars, have higher strength than the former.
4. According to the role in the structure
Compression bars, tension bars, erecting bars, distribution bars, stirrups, etc.
The steel bars arranged in reinforced concrete structures can be divided into the following types according to their functions:
① Stressed bar - steel bar that bears tensile and compressive stress.
② Stirrups - bear part of the oblique tensile stress and fix the position of the stress bars, which are mostly used in beams and columns.
③ Frame erection bars - used to fix the position of the steel hoop in the beam to form the steel skeleton in the beam.
④Distribution ribs - used in roof slabs and floor slabs, arranged vertically with the reinforcing bars of the slabs, evenly transferring the weight to the reinforcing bars, fixing the position of the reinforcing bars, and resisting thermal expansion and contraction caused by temperature deformation.
⑤Others - Structural ribs configured due to structural requirements of components or construction and installation needs. Such as waist bars, embedded anchor bars, prestressed bars, rings, etc.
According to rolling shape
①Smooth steel bars: Grade I steel bars (Q300 steel bars) are all rolled into a smooth round section, and the supply form is coiled, with a diameter of not more than 10mm and a length of 6m~12m.
② Ribbed steel bars: There are three types of spiral, herringbone and crescent shapes. Generally, grade II and III steel bars are rolled into a herringbone shape, and grade IV steel bars are rolled into a spiral shape and a crescent shape. Crescent rib reinforcement: The longitudinal section of the transverse rib is crescent-shaped and does not intersect with the longitudinal rib. ③ Steel wire (divided into low carbon steel wire and carbon steel wire) and steel strand.
④Cold-rolled and twisted steel bars: cold-rolled and cold-twisted.
The smooth round steel bar is actually the small round steel and coil of ordinary low carbon steel. Deformed bars are surface-ribbed bars, usually with 2 longitudinal ribs and transverse ribs evenly distributed along the length. The shape of the transverse rib is spiral, herringbone and crescent shape. Expressed in millimeters of nominal diameter. The nominal diameter of deformed bars corresponds to the nominal diameter of smooth round bars of equal cross-section. The nominal diameter of the rebar is 8-50 mm, and the recommended diameters are 8, 12, 16, 20, 25, 32, and 40 mm. Steel grades: 20MnSi, 20MnV, 25MnSi, BS20MnSi. Reinforcing bars are mainly subjected to tensile stress in concrete. Due to the action of ribs, deformed steel bars have greater bonding ability with concrete, so they can better withstand the action of external forces. Steel bars are widely used in various building structures. Especially large, heavy, light thin-walled and high-rise building structures.
FAQ：
Q: What kind of work does your company do?
A: We are a business steel industry and trade.We mainly produces carbon steel plate/pipe/coil/bars, etc.
Q: What are the advantages of your company?
A: (1): Prime quality and reasonable price.
(2): Wide excellent experiences with after-sale service.
(3): Every process will be checked by responsible QC which insures every product's quality.
(4): Professional packing teams which keep every packing safely.
(5): Samples can be provided as your requirements.
Q: What is your terms of payment ?
A: Can be negotiated by both parties. If you have another question, pls feel free to contact us as below.
Q: What about your price?
A: Our price is very competitive.
Pls feel free to contact us if you are interested in our products.
Q: How long is your delivery time?
A: Different products have different delivery time. The products will be delivered as soon as possible on the basis of the quality assurance. Usually the delivery time is within 5-15 days after we received your balance.
