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Help CenterSteel Rebar & Deformed Steel Bar，ASTM A615 Gr40 / Gr60、BS4449 B500B
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1. Product Overview
Deformed Steel Bar, also named Reinforcing Bar or Steel Reinforcement, is featured with crescent transverse ribs on surface. Mechanical interlock is formed between ribs and concrete to prevent slippage between steel and concrete.Reinforcing Bar is continuously hot rolled, divided into ordinary grade and seismic grade. Grades marked with letter E own reasonable yield-to-tensile ratio and high elongation, suitable for seismic fortification zones. All kinds of Steel Reinforcement deliver stable strength and excellent ductility, available for bending, welding and mechanical sleeve connection. Deformed Steel Bar is widely adopted in residential buildings, bridges, highways, water conservancy and municipal reinforced concrete projects worldwide.
2. Implementation Standards
✅ Domestic Standard: GB 1499.2-2024
✅ European & American Standards: ASTM A615, BS 4449 B500B
✅ Japanese & Korean Standards: JIS G3112All Deformed Steel Bar are tested batch by batch via tensile, bending and impact tests. Original Mill Test Certificates (MTC) can be provided. Third-party inspection such as SGS and BV is acceptable to meet tender requirements of domestic and overseas infrastructure projects purchasing Reinforcing Bar and Steel Reinforcement.
3. Common Steel Grades
Ordinary Grade
HRB400, HRB500
Seismic Grade (Mainstream for Engineering)
HRB400E, HRB500E
Export Standard Grades
ASTM A615 Gr40 / Gr60, BS4449 B500B
Selection Guide
HRB400E: Residential buildings, factories, municipal road beams, slabs and columns, universal Reinforcing Bar
HRB500E: High-rise buildings, long-span bridges and large water conservancy hubs, high-strength Deformed Steel Bar
B500B / Gr60: Standard Steel Reinforcement for infrastructure projects in Southeast Asia, Middle East and Africa
4. Production Process
Continuous casting square billet incoming inspection → Uniform heating in walking-beam furnace → High-pressure water descaling → Continuous rough, intermediate & finish rolling → Thermo-mechanical controlled rolling & cooling → Natural cooling on cooling bed → Fixed-length shearing → Full appearance & dimension inspection → Mechanical & chemical test → Marking → Strapping & warehousing.Continuous rolling process ensures full rib shape, stable dimensional tolerance and uniform performance of every Deformed Steel Bar.
5. Core Technical Parameters
5.1 Common Specification Range
Nominal Diameter: Φ10,12,14,16,18,20,22,25,28,32mmStandard Length: 9m, 12m; customized length 6m–12m availableDelivery Form: Straight Deformed Steel Bar; coiled steel reinforcement is optional
5.2 Key Mechanical Properties (HRB400E)
Yield strength ≥400MPa, Tensile strength ≥540MPa, Elongation ≥16%; Tensile/yield ratio ≥1.25, Yield ratio ≤0.85, Agt ≥9%
5.3 Appearance Requirements
Continuous intact crescent ribs, free of missing ribs, cracks, scars and folds. Clear rolling marks (grade, mill logo, diameter) on each bar of Reinforcing Bar.
6. Core Product Advantages
Strong bonding force: Surface rib structure enables tight combination between Deformed Steel Bar and concrete, stable load transfer without slippage.
Reliable seismic performance: Seismic grade Reinforcing Bar has sufficient ductility to absorb deformation energy under earthquake and avoid brittle structural collapse.
Excellent processability: Suitable for cold bending, arc welding, electroslag pressure welding and straight thread sleeve connection, matching various construction technologies.
Pure stable material: Strict control of harmful sulfur and phosphorus elements to reduce aging embrittlement risk for Steel Reinforcement.
Complete specifications & sufficient stock: Regular HRB400E Deformed Steel Bar Φ12–Φ32 available in stock, supporting small trial orders and bulk engineering orders.
Complete documents: Standard mill certificates, convenient acceptance by engineering supervisors for all Reinforcing Bar.
7. Main Application Fields
Building Construction: Frame beams, columns, floor slabs and foundations of high-rise apartments and industrial plants mainly adopt Deformed Steel Bar.
Transportation Infrastructure: Reinforcing Bar widely used in expressways, railway bridges, tunnels, culverts and toll station main structures.
Water Conservancy Projects: Dams, sluices, reservoirs and sewage treatment structures constructed with Steel Reinforcement.
Municipal Engineering: Utility tunnels, viaducts, retaining walls and airport terminals using Deformed Steel Bar.
Ports, storage yards and heavy equipment foundation reinforced concrete structures manufactured from Reinforcing Bar.
8. Packaging, Transportation & Delivery Cycle
Packaging: Strapped by steel strips with clear label on each bundle; seaworthy anti-moisture package for export orders to prevent loose binding during sea transportation of Steel Reinforcement.
Transportation: Truck delivery, railway transport and container sea freight with convenient loading at Qingdao, Tianjin ports for all Deformed Steel Bar.
Delivery Cycle: Standard in-stock specifications deliverable within 3–7 working days. Orders with special length or customized export grades take 7–12 working days. Independent production plan for ten-thousand-ton large-scale projects.
Weighing Method: Theoretical weight or actual weighing, confirmed through mutual negotiation for all Deformed Steel Bar, Reinforcing Bar and Steel Reinforcement.
9. Quality Acceptance Standards
All Deformed Steel Bar are inspected according to national and overseas standards. Dimensions, weight tolerance, surface appearance and mechanical properties must meet requirements. No cracks or internal lamination allowed. Complete material certificates are delivered together with goods. On-site third-party sampling inspection is acceptable for every batch of Reinforcing Bar and Steel Reinforcement.
10. Precautions for Use
Seismic grade Steel Reinforcement marked with E must be adopted for main structures in seismic zones. Ordinary bar cannot be used as replacement.
Avoid violent impact during handling and stacking to prevent bar deformation and surface damage of Deformed Steel Bar.
Anti-rust protection is required for long-term outdoor storage. Rusty Reinforcing Bar can only be used after passing re-inspection.
Control bending radius during processing to avoid micro-cracks on ribs of Steel Reinforcement.
Follow design drawing requirements for overlapping length and anchorage to guarantee coordinated stress of steel and concrete.
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