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Help CenterDeformed Steel Bar & Ribbed Steel Bar，12/14/16/18/20/22/25mm
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Detailed Description of Deformed Steel Bar
1. Definition & Classification
Deformed steel bar, hot rolled ribbed bar for short, features ribbed surface. It is widely used in reinforced concrete structures to enhance bonding force with concrete and prevent displacement.
Grades (GB 1499.2-2024)
HRB335: Yield strength ≥335MPa
HRB400/HRB400E: Yield strength ≥400MPa, mainstream seismic grade
HRB500: Yield strength ≥500MPa, high strength grade
E: Seismic resistance property
Common Specifications: Diameter 12/14/16/18/20/22/25/28/32/40mmStandard length: 9m, 12m, customized length available
2. Chemical Composition (HRB400E)
| Element | C | Si | Mn | P | S | Alloy Elements |
|---|---|---|---|---|---|---|
| Content(%) | 0.20-0.25 | 0.40-0.70 | 1.20-1.60 | ≤0.045 | ≤0.045 | Trace |
3. Mechanical Properties
| Grade | Yield Strength(MPa) | Tensile Strength(MPa) | Elongation(%) |
|---|---|---|---|
| HRB400E | ≥400 | ≥540 | ≥16 |
4. Theoretical Weight
| Nominal Diameter(mm) | Weight(kg/m) |
|---|---|
| 12 | 0.888 |
| 16 | 1.580 |
| 20 | 2.466 |
| 25 | 3.850 |
| 32 | 6.310 |
| 40 | 9.860 |
5. Production Process
Iron smelting → Steelmaking → Continuous casting → High temperature rolling → Cooling & finishing → Inspection & packing
6. Product Advantages
Strong adhesion and anchoring performance with concrete
High tensile strength and bearing capacity
Excellent seismic and ductility performance
Easy bending, welding and mechanical connection
Cost-effective for construction projects
7. Application Scope
Building beam, column, floor, foundation, bridge, tunnel, highway, water conservancy project, factory building and large infrastructure construction
8. Quality Standard & Inspection
Executive Standard: GB 1499.2-2024Surface free of crack, scar and fold; clear rib shape.Strict tests on dimension, weight, tension and bending performance.
9. Packaging & Transportation
Bundled packing, 2-5 tons per bundle with product label.Store and transport away from moisture to avoid rust and deformation.
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