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Help CenterSteel Rebar & Reinforced Steel Bar，HRB400、HRB500、HRB400E、HRB500E
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1. Product Overview
Reinforced Steel Bar, also known as hot-rolled ribbed steel bar, is a special hot-rolled steel bar for concrete structures with spiral transverse ribs on the surface. The ribs greatly enhance the bonding force with concrete. Featuring high tensile strength, excellent elongation, superior seismic performance and good weldability & bendability, Reinforced Steel Bar serves as the core reinforcing material for concrete load-bearing structures in building construction, road & bridge, water conservancy and municipal infrastructure projects. Our factory mainly supplies two major series: Ordinary Reinforced Steel Bar and Seismic Reinforced Steel Bar. All specifications of Reinforced Steel Bar can adapt to various working conditions including ordinary civil buildings, high-rise buildings, bridge pile foundations, water conservancy dams, underground pipe corridors and high-intensity seismic projects. Adopting continuous casting billet integrated hot rolling technology, Reinforced Steel Bar features regular rib shapes, strict dimensional tolerances and clearly rolled brand & size marks on the surface. It supports deep processing such as cutting, bending, threading and welding, making it one of the most widely used construction steel products for domestic infrastructure and overseas civil engineering projects.
2. Product Classification
Classified by strength grade and seismic performance, Reinforced Steel Bar is divided into two core categories, covering most application scenarios of civil engineering, municipal, water conservancy and bridge projects:
1. Ordinary Reinforced Steel Bar: With HRB400 and HRB500 as core grades, Ordinary Reinforced Steel Bar has stable strength and high cost performance. As the most widely used Reinforced Steel Bar in the market, it is extensively applied in civil buildings, factory frames, municipal roads and secondary load-bearing components, suitable for conventional concrete structure projects without high seismic resistance requirements.
2. Seismic Reinforced Steel Bar: Seismic Reinforced Steel Bar adopts grades with suffix E, namely HRB400E and HRB500E, which meet dual seismic indicators of yield-to-tensile strength ratio and elongation. It has strong deformation capacity and avoids brittle fracture under seismic conditions. Seismic Reinforced Steel Bar is mostly used for high-rise buildings, bridge piers, water conservancy dams, high-intensity seismic buildings and key underground projects, complying with mandatory design requirements for seismic structures.
3. Special-purpose Reinforced Steel Bar: Including fine-grained Reinforced Steel Bar, wire rod coils and epoxy-coated Reinforced Steel Bar. Custom semi-finished processing such as fixed-length cutting, bending and threading is available to adapt to complex working conditions including corrosive environments and dense reinforcement layout.
3. Implementation Standards & Material Grades
All Reinforced Steel Bar products are manufactured in strict accordance with mandatory steel standards for reinforced concrete. Chemical composition, mechanical properties and seismic indicators are fully controlled. Complete MTC material test certificates can be provided to meet the acceptance requirements of domestic construction projects and export orders:
Implementation Standards: GB/T 1499.2-2018 Steel for Reinforced Concrete – Hot Rolled Ribbed Bars; International Standards: ASTM A615/A615M, BS 4449, JIS G3112
Ordinary Reinforced Steel Bar Grades: HRB400, HRB500, suitable for conventional concrete structures such as ordinary residences, factories and municipal roads
Seismic Reinforced Steel Bar Grades: HRB400E, HRB500E; Export grades: Gr60, Gr75, B500B, applicable to high-rise buildings, bridges, water conservancy and high-intensity seismic resistance projects
The high-quality Reinforced Steel Bar supplied by our factory features full hot rolling forming, full and clear transverse ribs without cracks, scabs or folds. The internal structure is uniform and stable, ensuring reliable tensile resistance, elongation, bending and welding performance ofReinforced Steel Bar.
4. Specification Parameters
4.1 Nominal Diameter Range
Conventional nominal diameter of Reinforced Steel Bar: 6mm-50mm; Common sizes: 12mm, 14mm, 16mm, 18mm, 20mm, 22mm, 25mm, 28mm, 32mm; Non-standard custom diameterReinforced Steel Bar is available. Small-diameter bars are used for structural reinforcement, while medium and large-diameter bars are applied to main load-bearing parts such as beams, columns, pile foundations and piers.
4.2 Length Range
Standard fixed lengths: 9000mm, 12000mm. Custom fixed and multiple lengths are supported to reduce on-site cutting loss and match the blanking dimensions of various civil engineering projects.
4.3 Surface & Delivery Condition
Delivered with hot-rolled black surface. Clear rolled marks of grade, size and factory logo are shown on the bar surface with regular spiral ribs and no cracks, folds or scabs. Deep processing including cutting, bending and threading is available on request, adapting to binding, welding and mechanical connection construction methods.
5. Core Product Advantages
1. Strong Concrete Bonding Force & Reliable Structural Safety: The uniform transverse ribs on Reinforced Steel Bar enable firm occlusion and bonding with concrete, avoiding stress slip and greatly improving the overall bearing capacity of concrete components.
2. Stable Mechanical Properties & Excellent Seismic Performance: Ordinary Reinforced Steel Bar and Seismic Reinforced Steel Bar have qualified yield strength, tensile strength and elongation indicators. Seismic-grade Reinforced Steel Bar meets strict yield-to-tensile strength ratio requirements, absorbing deformation energy during earthquakes and reducing structural collapse risks.
3. Excellent Construction & Machinability: Premium Reinforced Steel Bar features superior cold bending performance and supports cutting, threading, flash butt welding and lap welding, adapting to various construction techniques including on-site binding and mechanical connection.
4. Stable Dimensional & Weight Accuracy: The nominal diameter, rib height and theoretical weight of Reinforced Steel Bar are within controllable tolerances with small batch performance fluctuations, ensuring reliable engineering measurement and structural calculation.
5. Complete Specifications & Stable Supply: Conventional Reinforced Steel Bar is in sufficient stock for mass delivery. Special specifications and deep-processed semi-finished Reinforced Steel Bar can be arranged for production to match project delivery schedules.
6. Main Application Scenarios
1. Building Construction Engineering: Reinforced Steel Bar is widely used for reinforcement of beams, columns, floor slabs and shear walls in high-rise residences, commercial buildings and factories; Seismic Reinforced Steel Bar is applied to the main load-bearing frames of high-seismic-grade buildings.
2. Road & Bridge Traffic Engineering: Reinforced Steel Bar is extensively adopted as the main stress-bearing steel bar for highway bridges, railway bridges, tunnels, pile foundations, bearing platforms and piers to bear dynamic and static loads.
3. Water Conservancy & Underground Engineering: Seismic Reinforced Steel Bar is preferred for heavy-load parts of reservoir dams, flood gates, underground pipe corridors, subway stations and foundation support to enhance structural durability and disaster resistance.
4. Municipal Infrastructure: Reinforced Steel Bar is used for reinforcement of various concrete structures such as urban viaducts, pipe networks, retaining walls and comprehensive pipe corridors.
5. Overseas Civil Engineering Projects: Export Reinforced Steel Bar can be produced in accordance with American, British and Japanese standards, supporting complete sets of export material certificates for overseas building and road infrastructure projects.
6. Prefabricated Component Manufacturing: Reinforced Steel Bar is massively processed into prefabricated steel frames for PC components such as precast floor slabs, precast beams & columns and pipe piles in prefabricated factories.
7. Processing Methods
1. Cutting & Blanking: Reinforced Steel Bar is mechanically cut according to drawing sizes into fixed-length steel bar segments for beams, columns and pile foundations.
2. Bending Forming: Ordinary Reinforced Steel Bar and Seismic Reinforced Steel Bar can be cold-bent into steel components such as stirrups, hooks and reinforcement cages.
3. Threading & Mechanical Connection: The ends of Reinforced Steel Bar are rolled and threaded for mechanical docking via straight thread sleeves, replacing on-site welding and improving joint quality.
4. Welding Processing: Reinforced Steel Bar supports flash butt welding and lap welding for steel frame splicing, meeting the specifications of civil engineering construction.
8. Packaging, Quality Inspection & Delivery
1. Packaging Standard: Finished Reinforced Steel Bar is multi-point bundled with high-strength steel straps, sorted and aligned with material labels attached to each bundle. Export orders adopt reinforced marine packaging suitable for container ocean transportation.
2. Quality Inspection Guarantee: Each batch of Reinforced Steel Bar undergoes chemical composition, tensile and cold bending tests; Seismic Reinforced Steel Bar is additionally tested for yield-to-tensile strength ratio and total elongation at maximum force. Original factory MTC certificates are provided, supporting SGS, BV and other third-party inspection and acceptance.
3. Delivery Cycle: Conventional Reinforced Steel Bar, Ordinary Reinforced Steel Bar and Seismic Reinforced Steel Bar are in sufficient stock and delivered within 3-7 working days; non-standard fixed-length and deep-processed semi-finished Reinforced Steel Bar are delivered within 10-15 working days.
4. Logistics Distribution: Support full-truck domestic transportation and port container loading, complying with FOB, CIF and other international trade terms.
9. Storage & Usage Precautions
1. Store Reinforced Steel Bar on hardened ground with high terrain and smooth drainage, stacked at an elevated height to avoid rusting caused by water immersion. Stack Reinforced Steel Bar of different grades and specifications separately with clear identification.
2. Stack Ordinary Reinforced Steel Bar and Seismic Reinforced Steel Bar separately by grade and diameter to avoid mixed use. Seismic-resistant structures must adopt E-grade Seismic Reinforced Steel Bar, and replacement with ordinary Reinforced Steel Bar is strictly prohibited.
3. Protect Reinforced Steel Bar during hoisting and handling to prevent collision and bending deformation. Reinforced Steel Bar with severe bending, cracks or excessive rust is forbidden for main load-bearing structures.
4. Distinguish between Ordinary Reinforced Steel Bar and Seismic Reinforced Steel Bar during project selection, strictly matching the grade and diameter of design drawings. Random replacement is not allowed to avoid unqualified structural stress performance.
5. The cutting, bending, welding and sleeve connection construction of Reinforced Steel Bar shall comply with concrete structure construction specifications to ensure qualified steel bar joints and anchorage length and guarantee overall structural safety.
10. Supporting Derivative Products
- Seismic Reinforced Steel Bar: HRB400E and HRB500E grades with complete seismic indicators, suitable for high-rise buildings, bridges and high-intensity seismic engineering projects
- Deep-processed Reinforced Steel Bar: Original Reinforced Steel Bar processed with customized cutting, bending and threading, providing semi-finished steel products to reduce on-site construction workload
- Fine-grained Reinforced Steel Bar: HRBF400E and HRBF500E grades with superior weldability, ideal for large-scale civil engineering projects with high welding requirements
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