Xi'an Dongmeng Group Co., Ltd. is one of the most reliable manufacturers and suppliers of epoxy coated steel rebar in China, also supports customized service. With abundant experience, we warmly welcome you to wholesale cheap products in stock here and get free sample from our factory. For price consultation, contact us.
Epoxy-Coated Steel Rebar | ASTM A775 & A934
Epoxy-coated steel rebar is reinforcing steel protected by a fusion-bonded epoxy coating. It is specified in concrete projects where moisture and chlorides create a corrosion risk, including bridge decks, parking structures and selected coastal works. The project specification determines the steel grade, coating route, fabrication requirements and acceptance criteria.
Xi'an Dongmeng Group Co., Ltd. accepts project inquiries for epoxy-coated reinforcing bars. Send us your drawings, required standards, bar sizes, quantities and delivery destination. We will confirm the available product configuration, inspection documents, minimum order and lead time in a written quotation.
Where Epoxy-Coated Rebar Is Specified
Epoxy-coated reinforcement is commonly considered for bridge decks and road structures exposed to deicing salts, parking structures, and concrete works in coastal environments. The engineer of record determines whether it is suitable for the exposure conditions and sets the concrete cover, anchorage, splice and detailing requirements.
The coating acts as a barrier around the steel. Its condition during fabrication, transport, storage and placement matters. Include protection, inspection and repair requirements in the project specification and purchase order.
ASTM A775 vs ASTM A934: Which Coating Route Do You Need?
| ASTM A775/A775M | ASTM A934/A934M | |
|---|---|---|
| Fabrication sequence | Straight bars are coated first; subsequent fabrication requires the specified handling and repair procedure | Bars are prefabricated to the required shape before surface preparation and coating |
| Typical order information | Straight-bar sizes, lengths and any later fabrication requirements | Approved bar bending schedule, dimensions and quantities by shape |
| Selection point | Use when the project specifies the A775 route | Use when the project specifies prefabricated bars coated after shaping |
Confirm the route with the project engineer before ordering. The coating specification does not replace the requirement to state the underlying steel standard and grade.
Technical Specifications
| Item | Project ordering guidance |
|---|---|
| Product | Epoxy-coated steel reinforcing bar |
| Coating | Fusion-bonded epoxy |
| Coating specification | ASTM A775/A775M for the specified straight-bar coating route; ASTM A934/A934M for bars prefabricated before coating |
| Base-bar specification | State the required standard and grade, such as ASTM A615/A615M or ASTM A706/A706M; confirm by mill certificate |
| Grade | Follow the approved drawings. Quote ASTM and Chinese-standard grades separately; do not treat them as automatic substitutes |
| Bar size | Specify the exact ASTM bar number or metric nominal diameter. Confirm availability for the selected grade and coating route |
| Length | 6 m, 9 m, 12 m or a specified cut length, subject to quotation |
| Shape | Straight bars or approved prefabricated shapes with a bar bending schedule |
| Coating thickness | Set the acceptance range in the selected standard and project specification; verify it through the agreed inspection records |
| Inspection documents | Request the base-steel mill certificate and applicable coating inspection records in the purchase order |
| MOQ and delivery | Confirm for the required size, form, quantity and destination before placing an order |
Mechanical Properties of Base Metal
|
Chinese Rebar Code |
Yield Strength (Mpa) |
Tensile Strength (Mpa) |
Carbon Content |
|
HRB400, HRBF400, HRB400E, HRBF400E |
400 |
540 |
≤ 0.25 |
|
HRB500, HRBF500, HRB500E, HRBF500E |
500 |
630 |
≤ 0.25 |
|
HRB600 |
600 |
730 |
≤ 0.28 |
Features and Benefits
Superior Corrosion Resistance: The epoxy coating provides a durable barrier protecting the steel from chloride and moisture penetration.
Extended Service Life: Reduces rusting and cracking, ensuring long-term structural performance.
Strong Adhesion: Fusion-bonded epoxy coating adheres firmly to the steel surface, minimizing peeling and damage during handling.
High Compatibility: Works effectively with concrete and other protective systems such as galvanized or stainless steel components.
Versatile Application: Available in multiple diameters, lengths, and bending configurations.
Low Maintenance Cost: Reduces repair and replacement expenses in harsh environments
Quality, Handling and Documentation
For a project order, agree on the following before production:
Base steel: Confirm the steel standard, grade, bar marking and mill certificate requirements.
Coating route: State ASTM A775/A775M or ASTM A934/A934M and provide the approved fabrication schedule.
Acceptance: Define the required coating inspection plan, including thickness, continuity and other tests applicable to the order.
Transport and storage: Specify bundle identification and protection against abrasion or impact.
Site repairs: Inspect cut ends and coating damage. For A775 bars, use the applicable project requirements and ASTM D3963/D3963M handling and repair provisions.
Request sample inspection records or other supporting documents during quotation review if your project requires them.
Packaging and Delivery
Packed in bundles with color-coded tags and labels.
Each bundle includes bar size, length, heat number, and coating batch number.
Protected with plastic or tarpaulin wrapping to prevent coating damage during transport.
Fast worldwide delivery via sea or land freight.
FAQ – Frequently Asked Questions
What is the difference between ASTM A775 and ASTM A934 epoxy-coated rebar?
Under the A775 route, straight bars are coated before any subsequent project fabrication. A934 covers reinforcing bars prefabricated to shape before they are coated. Specify the required route in the purchase order.
Can you quote ASTM A615 Grade 60 epoxy-coated rebar?
Send the ASTM A615/A615M grade, bar sizes, quantities and required coating specification. Availability and the supporting mill certificate should be confirmed in the quotation.
Is HRB400 the same as ASTM Grade 60?
Do not substitute one designation for the other based on its name or nominal strength. They belong to different specifications. Any proposed substitution requires review against the project requirements and approval by the responsible engineer.
What sizes and lengths can I order?
The existing product listing gives a 6–50 mm diameter range and 6 m, 9 m and 12 m lengths. Confirm the exact ASTM bar number or metric diameter, grade, length and coating route when requesting a quote.
What coating thickness should I specify?
Use the acceptance requirements of the selected coating standard and your project specification. A single thickness range should not be applied to every A775 and A934 order.
Can coated bars be cut or bent after coating?
Any subsequent fabrication must follow the approved project procedure and the applicable coating and handling requirements. Plan bends before ordering; inspect and repair any resulting coating damage as specified.
How should damaged coating or cut ends be handled?
Identify damage during handling and before concrete placement. Use the approved repair material and procedure specified for the order. For A775 material, refer to the applicable ASTM D3963/D3963M and project requirements.
Is epoxy-coated rebar suitable for coastal projects?
It may be specified for chloride-exposed concrete, including selected coastal works. Suitability depends on the complete structural and durability design, exposure conditions, and proper coating handling.
What documents should a buyer request?
State your requirements for the base-steel mill certificate, heat identification, coating inspection records, bundle identification and any project-specific inspection in the purchase order.
What determines MOQ, price and lead time?
The steel standard and grade, bar size, straight or prefabricated form, coating specification, total quantity and delivery destination all affect the offer. Send these details for a project-specific quotation.
application
1. Definition and composition
Epoxy coated steel bars are made by coating a layer of epoxy powder coating on the surface of steel bars. Through a specific process, it is tightly bonded to the surface of the steel bars to form a dense anti-corrosion layer. This coating can effectively isolate the steel bars from the surrounding environment, thereby preventing the steel bars from corroding.
2. Manufacturing process
The manufacturing process of epoxy coated steel bars mainly includes the steps of steel bar surface pretreatment, epoxy powder coating preparation and coating, curing and cooling. Among them, steel bar surface pretreatment is the key link, and it is necessary to thoroughly remove impurities such as oil and rust on the surface of the steel bars to ensure a good combination of the coating and the steel bars. Electrostatic spraying is usually used during coating to make the epoxy powder evenly adhere to the surface of the steel bars. The curing process needs to be carried out at high temperature to melt the epoxy powder and level it on the surface of the steel bars, and finally form a solid anti-corrosion layer.
3. Performance characteristics
Excellent anti-corrosion performance: Epoxy coating has extremely high corrosion resistance, which can effectively prevent the corrosion of steel bars in harsh environments and extend the service life of steel bars.
Good adhesion: The epoxy coating is tightly bonded to the surface of the steel bar, not easy to fall off, and can maintain a long-term anti-corrosion effect.
Convenient construction: The construction process of epoxy coated steel bars is relatively simple and easy to operate, which can greatly improve the construction efficiency.
Environmental performance: Epoxy coating materials are non-toxic, non-polluting, meet environmental protection requirements, and are harmless to the human body and the environment.
4. Application fields
Epoxy coated steel bars are widely used in various occasions where steel bar anti-corrosion is required, such as bridges, tunnels, highways, water conservancy projects, seaports and other infrastructure construction. Especially in environments containing chloride ions, such as coastal areas or salt lake areas, the anti-corrosion performance of epoxy coated steel bars is more prominent, which can effectively prevent structural damage caused by corrosion of steel bars.
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Looking for a reliable Epoxy-Coated Rebar supplier?
We provide high-quality ASTM A775 / A934 epoxy-coated reinforcing bars with full certification and global export support.
Our address
Room 4107, Runfeng Building, Sanqiao New Street, Weiyang District, Xi'an City, Shaanxi Province
Phone Number
+86 15769214734
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