HRB300 steel bar is a crucial material in the construction field. The HRB300 steel bar has a yield strength of 300 megapascals, ensuring structural stability. It exhibits good ductility, allowing for some deformation without fracturing. The HRB300 steel bar is commonly used in reinforced concrete structures. It bonds well with concrete, enhancing the overall strength of the construction. The surface quality of the HRB300 steel bar is also important, as it affects its corrosion resistance and bonding ability.
HRB300 steel bar, concrete steel bar refers to the straight bar or coil steel bar used for reinforced concrete reinforcement. Its shape is divided into round steel bar and special-shaped steel bar. There are two delivery states: straight bar and coil. Plain round steel bar is actually small round steel bar and coil of ordinary mild steel. Special-shaped steel bar is a steel bar with ribs on the surface, usually with two longitudinal ribs and evenly distributed transverse ribs along the length. The shapes of transverse ribs include spiral, herringbone, crescent, etc.
The material of HRB300 steel bar meets the national standards of China and has the characteristics of high strength, excellent processability, good heat treatment performance, etc. It is widely used in many fields such as construction, bridges, railways, airports, dams, etc.
|
Products |
Deformed steel bar |
|
Grade |
HRB300, HRB400, HRB500 etc. |
|
Outer Diameter |
6mm,8mm,10mm,12mm,14mm,16mm,18mm,20mm,22mm,25mm,28mm,32mm,36mm,40mm,50mm or as customers' request |
|
Material |
Q195, Q235B, Q355B, 16Mn, ST37, 40Cr, 20CrMo, etc. |
|
Length |
6m/9m/12m or as customers' request |
|
Lead Time |
Within 7 days after received 30% deposit or irrevocable L/C at sight |
|
Packing |
Bundle, or with all kinds of colors PVC or as your requirements |
|
Application |
Building/construction |
1) The mechanical properties of the steel bar should comply with the following table: nominal diameter of the grade mm σs
|
grade |
nominal diameter mm |
σs(orσp0.2)Mpa |
σbMPa |
δ5% |
|
HRB335 |
6-25 28-50 |
300 |
490 |
16 |
|
HRB400 |
6-25 28-50 |
400 |
570 |
14 |
|
HRB500 |
6-25 28-50 |
500 |
630 |
12 |
Steel bar processing generally goes through four processes: steel rust removal; Steel bar straightening; Steel bar cutting; Steel bar forming.
When the bar joint is connected with straight thread or taper thread, it is necessary to increase the upsetting and threading process of the bar end. Rebar batching and replacement Rebar replacement
(1) When replacing the steel bar specified in the design document with a steel bar of another steel number or diameter, the following provisions shall be observed:It should be carried out according to the principle that the design value of the bearing capacity of the steel bar is equal, and the structural requirements such as the spacing of the steel bar, the anchoring length and the minimum diameter of the steel bar should be met after the replacement.
When replacing lower grade steel bars with higher grade steel bars, it is advisable to change the diameter of steel bars rather than the number of steel bars to reduce the cross-sectional area of steel bars.
(2) When a steel bar of the same diameter is used to replace a steel bar of another diameter, the diameter change range should not exceed 4mm, and the ratio of the total section area of the steel bar after the change to the section area specified in the design document should not be less than 98% or more than 103%.
(3) When the design main reinforcement is replaced with the same steel number, the spacing should be kept unchanged, and two types of reinforcement spacing configurations with diameters larger and smaller than the diameter of the design reinforcement can be replaced.
