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Help CenterSteel Rebar & Deformed Steel Bar / Rebar，Φ6mm、Φ8、Φ10、Φ12、Φ14、Φ16、Φ18、Φ20、Φ22、Φ25、Φ28、Φ32、Φ40、Φ50mm
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1. Product Overview
The standard name of deformed steel bar is Hot Rolled Ribbed Bar (Rebar). It is the primary load-bearing steel for reinforced concrete structures. Two longitudinal ribs and evenly distributed transverse crescent ribs are rolled on the bar surface, which greatly improve the bonding force between steel bar and concrete, prevent sliding under stress and enhance the bearing capacity and seismic performance of buildings.
Applicable Standards
National Standard of China: GB 1499.2-2018 Steel for Reinforcement of Concrete – Part 2: Hot Rolled Ribbed BarsExport standards available on demand: BS4461 (UK), JIS G3112 (Japan), ASTM A615 (USA), AS4671 (Australia), etc. Certifications including CARES and KSA are supported.
2. Steel Grades & Mechanical Properties
Grade Explanation: HRB = Hot Rolled Ribbed Bar; number = minimum yield strength (MPa); suffix E = seismic resistant rebar; F = fine grain rebar
| Grade | Min. Yield Strength ReL | Min. Tensile Strength Rm | Elongation A | Application Scope |
|---|---|---|---|---|
| HRB400 / HRB400E | 400MPa | 540MPa | ≥16% | Civil residences, factories, municipal roads, mainstream general grade |
| HRB500 / HRB500E | 500MPa | 630MPa | ≥15% | High-rise buildings, bridges, tunnels, large heavy-load infrastructure |
| HRB600 | 600MPa | 730MPa | ≥14% | Super high-rises, long-span structures, special engineering projects |
| HRB335 (Old Grade II Bar) | 335MPa | 455MPa | ≥17% | Phased out, only used for partial old building renovation |
Mandatory special requirements for seismic rebar (Grade E): Strength ratio ≥1.25, yield strength ratio ≤1.30, total elongation at maximum force ≥9%. Compulsory for construction in seismic zones.
Chemical Composition (Internal Control Standard)
C ≤0.25%, Si ≤0.80%, Mn ≤1.60%, P ≤0.045%, S ≤0.045%, Carbon Equivalent Ceq ≤0.55. Low harmful impurities ensure stable welding and bending performance.
3. Size & Theoretical Weight
Nominal Diameter Range
Φ6mm, Φ8mm, Φ10mm, Φ12mm, Φ14mm, Φ16mm, Φ18mm, Φ20mm, Φ22mm, Φ25mm, Φ28mm, Φ32mm, Φ40mm, Φ50mmCommon sizes for civil construction: Φ12–Φ25; Large sizes Φ28–Φ50 for bridges and pile foundations.
Standard Delivery Length
Domestic regular fixed lengths: 9m, 12m; Custom lengths 6m, 8m, 10m or multiple lengths available
Export standard lengths: 6–12m, cuttable per customer’s requirement
Theoretical Weight of Common Sizes (kg/m)
Φ12=0.888, Φ16=1.580, Φ20=2.466, Φ25=3.850, Φ32=6.310, Φ40=9.865
4. Production Process
Steelmaking: Molten steel smelted by converter or electric furnace, continuously cast into steel billets
High-temperature rolling: Billets heated above 1100°C, continuously rolled by bar mill with rib patterns formed simultaneously
Controlled cooling: Air cooling or water quenching to stabilize metallographic structure and guarantee strength & toughness
Finishing & Bundling: Fixed-length cutting, surface marking, strapping and quality inspection before warehousing
5. Surface Quality & Marking Requirements
Surface: Clear and uniform ribs, free of cracks, scabs, folds, delamination and severe rust; flat cut ends
Permanent Marking: Each bar is embossed with permanent marks including manufacturer code, steel grade and nominal diameter for traceability
Dimensional Tolerance: ±6% for Φ6–12mm; ±5% for Φ14–20mm; ±4% for Φ22–50mm, complying with national standard deviation limits
6. Core Product Advantages
Strong Adhesion: Concave-convex ribs interlock tightly with concrete to avoid structural cracking and sliding
Balanced Mechanical Performance: High strength and good ductility, excellent performance for bending, welding and threading
Stable Seismic Performance: HRB400E/HRB500E meet full seismic indicators to absorb deformation energy under earthquakes
Material Saving: Higher strength of HRB500 reduces steel consumption by 15%–20% under equal bearing capacity to lower overall project cost
Wide Compatibility: Full size range covering all concrete engineering including civil buildings, industrial plants, road & bridge, water conservancy and metro projects
7. Main Application Fields
Civil Construction: Main reinforcement for beams, columns, floor slabs, foundations and shear walls of residential buildings, office towers and shopping malls
Infrastructure: Expressways, railway bridges, tunnels, culverts, metro stations and pile foundations
Water Conservancy & Energy: Dams, hydropower stations, reservoirs, nuclear power auxiliary civil works
Industrial Plants: Heavy-duty workshops, warehouses and large equipment foundations
Overseas Export: Housing and infrastructure projects in Southeast Asia, Middle East, Africa and Europe
8. Packaging, Delivery & Quality Warranty
Packaging: Mechanically bundled with galvanized steel strips, each bundle weighs 2–3 tons. Metal quality tags are attached to each bundle marked with size, grade, heat number and weight
Lead Time: 5–7 days for regular in-stock sizes; 7–10 days for special large sizes or customized export orders. Direct container loading available at Tianjin Port
Quality Guarantee: Original mill test certificate (MTC) with full mechanical and chemical test reports provided for each batch. Third-party inspection (SGS, BV etc.) is acceptable.
Transportation: Truck, railway and sea container shipping are all available. FOB Tianjin Port or CIF terms can be arranged for foreign trade
9. Quality Inspection Items
Visual & dimensional inspection: Diameter, rib height, rib spacing and surface defects
Mechanical tests: Tensile test (yield strength, tensile strength, elongation), 180° cold bending test
Chemical analysis: Carbon, silicon, manganese, phosphorus, sulfur and carbon equivalent
Special seismic test for Grade E rebar: Strength ratio, yield ratio and total elongation at maximum force
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