Common size on stock, Special sizes needs new production.Can cut to Size, Cut to Shape.
EMERSONMETAL
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HRB400 and HRB500 are micro-alloyed, high-strength grades produced under strict Chinese national standards, featuring longitudinal and transverse ribs rolled into the surface to create mechanical anchorage within concrete. Whether you are casting columns, beams, floor slabs, or pile caps, these bars provide the tensile reinforcement necessary to compensate for concrete's inherent weakness in tension.
| Product name | 18mm 20mm Steel Rebar HRB400 HRB500 Deformed Steel Bar Iron Rods |
| Surface treatment | Oiled, Black painted or hot dip galvanized |
| common material | HRB335 HRB400 HRB500 Q195 Q235 Q345 |
| Outer diameter | Φ6、8、10、12、14、16、18、20、22、25、28、32、36、40、50 mm |
| Length | 6m、9m、12m |
| Technique | Hot Rolled |
| Packing | According to Customer's Requirements or Export's Standard |
Tianjin Emerson is a factory that provides various raw materials, including steel bars, steel plates, and steel coils. We offer cutting, bending, and welding services according to customer requirements. We specialize in OEM/ODM custom metal processing parts made from materials such as carbon steel and stainless steel.
| Property | HRB400 | HRB500 |
| Yield Strength | ≥400 MPa | ≥500 MPa |
| Tensile Strength | ≥540 MPa | ≥630 MPa |
| Elongation | ≥16% | ≥15% |
Q: What is the difference between HRB400 and HRB500 rebar?
A: HRB400 is a standard high-strength grade with a minimum yield strength of 400 MPa, suitable for most conventional building frames and slabs. HRB500 offers a higher yield strength of 500 MPa, allowing engineers to reduce the quantity of steel required for the same load capacity—beneficial for heavily loaded columns, long-span beams, and high-rise core walls. HRB500 is increasingly specified in modern seismic design for its superior strength-to-weight ratio.
Q: What is the theoretical weight per meter for 18mm and 20mm rebar?
A: The standard theoretical weight is 1.998 kg/m for 18mm diameter and 2.466 kg/m for 20mm diameter. Actual bundle weights may vary slightly due to manufacturing tolerances and rib geometry, but remain within ±6% of theoretical per GB/T 1499.2.
Q: Why does rebar have a deformed (ribbed) surface instead of being smooth?
A: The ribs create mechanical bonding with concrete. When concrete hardens around the ribs, it locks the bar in place, preventing slippage under tensile or shear loads. This mechanical interlock is far more reliable than the friction-based bond of smooth round bars, which is why deformed bars are mandatory for primary structural reinforcement in modern codes.
Q: Can you supply rebar cut to custom lengths, such as 4.5m or 7.2m?
A: Yes. While standard lengths are 6m, 9m, and 12m, we offer precision cut-to-length service for any dimension from 1m to 12m. Custom cutting reduces on-site waste and labor costs, particularly for projects with repetitive beam or pile cage specifications.
