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Help CenterDeformed Steel Rebar Used in Tunnel Lining and Bridge Construction HRB400
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Hemaokang Steel (Shandong) Co., Ltd., established in 2025 with an annual export value of US$50–100 million and a team of 51–100 experienced professionals, is proud to offer the HRB400 Deformed Steel Rebar — a premium reinforcement solution specifically engineered for tunnel lining and bridge construction. Our rebar combines high yield strength with excellent ductility, ensuring structural integrity in demanding environments where safety and longevity are non-negotiable. Manufactured under strict ISO9001 quality management systems, each bar delivers consistent performance, making it the trusted choice for civil engineers and contractors worldwide.
Product Overview:
HRB400 deformed steel rebar is a hot-rolled ribbed bar with a minimum yield strength of 400 MPa, designed to bond strongly with concrete. Its deformation pattern (ribs) maximizes mechanical interlock, reducing slippage and enhancing load transfer. This rebar is ideal for heavy-duty applications such as tunnel linings (shotcrete support, ground stabilization) and bridge decks, piers, and abutments where high tensile strength and crack resistance are critical.
▶ Key Features & Technical Advantages
- High Yield Strength (400 MPa min) – Reduces the quantity of steel needed, saving material costs while maintaining safety margins.
- Excellent Weldability – Low carbon equivalent permits welding without preheating for most common joints, accelerating on-site fabrication.
- Superior Bond with Concrete – Rib geometry enhances shear transfer and crack control, crucial for tunnel linings and bridge decks.
- Ductility (Elongation ≥ 16%) – Allows plastic deformation before failure, providing warning signs in overload conditions.
- Consistent Dimensional Accuracy – Strict tolerance control on diameter, length, and rib height ensures easy installation and compatibility with standard couplers.
- Corrosion Resistance Options – Available with optional epoxy coating or galvanizing for aggressive environments (upon request).
▶ Technical Specifications (HRB400 Grade)
| Parameter | Value | Test Standard |
|---|---|---|
| Yield Strength (ReL) | ≥ 400 MPa | GB/T 228.1 |
| Tensile Strength (Rm) | ≥ 540 MPa | GB/T 228.1 |
| Elongation (A) | ≥ 16% | GB/T 228.1 |
| Bend Test (180°) | Pass (d = 6a) | GB/T 1499.2 |
| Surface Rib Height | 0.5 – 1.5 mm (average) | GB/T 1499.2 |
| Carbon Equivalent (Ceq) | ≤ 0.50% | GB/T 1499.2 |
| Packaging Weight | 2 – 5 tons per bundle (customizable) | Customer spec |
▶ Industry-Specific Benefits
- For Tunnel Lining: The rebar’s high bond strength ensures effective load transfer to shotcrete, preventing delamination. Its ductility accommodates ground movement without sudden failure, critical in soft rock or seismic zones.
- For Bridge Construction: The rebar’s tensile strength and fatigue resistance extend service life of decks and piers. Consistent rib dimensions simplify tie‑wire connections and reduce labor time.
- Logistical Advantages: Our flexible cutting and bending services (up to 12 m lengths) reduce waste and speed up installation. Bundles are clearly tagged with grade, heat number, and dimensions for traceability.
▶ Customization Options
- Diameter: 10 mm to 40 mm (other sizes available upon request).
- Length: 6 m, 9 m, 12 m, or cut-to-length.
- Bending: Standard hooks, stirrups, or custom shapes per drawing.
- Coating: Epoxy, galvanized, or black (mill scale).
- Packaging: Bare bundles, or with waterproof wrapping for sea freight.
Our HRB400 deformed rebar complies with international standards such as ISO 6935‑2 and can also be supplied to ASTM A615 Grade 60 or BS4449 Grade B500B upon request. All shipments include mill test certificates (EN 10204 type 2.2 or 3.1) and are traceable to the original heat.
▶ Trust & Reliability
Hemaokang Steel has been recognized for its commitment to quality since inception. Our ISO9001‑certified facility employs rigorous inspection protocols at every stage — from raw material sourcing to final packaging. With an annual export value exceeding US$50 million and a presence in over 15 major markets including North America, Southeast Asia, the Middle East, and Europe, we have earned the trust of global infrastructure developers.
Why choose Hemaokang?
- ✅ ISO9001 certified quality management system
- ✅ In‑house testing lab for tensile, bend, and chemical analysis
- ✅ Fast turnaround: 15–30 days for standard orders
- ✅ Competitive pricing backed by direct mill supply
- ✅ Dedicated after‑sales support and technical consultation
We invite you to experience the strength and reliability of our HRB400 deformed rebar for your next tunnel lining or bridge project. Contact our sales team today for a quotation, sample request, or technical datasheet — we are ready to support your success.
Frequently Asked Questions (FAQ)
Q1: What is the difference between HRB400 and HRB500 rebar?
A: HRB400 has a minimum yield strength of 400 MPa, while HRB500 delivers 500 MPa. HRB400 is more cost‑effective for general tunnel and bridge work; HRB500 is used when higher strength is required to reduce steel congestion. Both are available from Hemaokang.
Q2: Can you supply rebar with threads or couplers?
A: Yes, we can provide threaded ends and matching mechanical couplers as per your specifications. This option reduces on‑site welding and speeds up connection.
Q3: What is the typical delivery lead time?
A: For standard diameters and lengths, lead time is 15–20 days after order confirmation. Custom sizes or coatings may require 25–30 days. We offer partial shipments to meet urgent milestones.
Q4: How is the rebar protected against corrosion during transit?
A: Standard bundles are shipped with bare mill scale (dark surface) which offers short‑term protection. For longer sea journeys or humid climates, we can apply a water‑resistant wrapping or rust‑preventive oil at no extra cost for large orders.
Q5: Do you provide third‑party inspection before shipment?
A: Absolutely. We welcome SGS, Bureau Veritas, or any accredited inspector. Mill certificates and test reports are issued with every shipment. ISO9001 audits are conducted annually.
Q6: What is the minimum order quantity (MOQ)?
A: Standard MOQ is 25 metric tons per size. For trial orders or special profiles, we can negotiate lower quantities — please contact us.
Q7: Can you bend rebar into specific shapes for tunnel arches?
A: Yes, we have bending machines capable of producing circular segments, hooks, and stirrups. Provide a detailed drawing, and our engineers will confirm feasibility and tolerance.
Q8: Are samples available for testing?
A: Yes, we can send free samples of 1‑meter length (shipping cost covered by customer for non‑regular clients). For large projects, we support paid sample sets with comprehensive test reports.
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