HPB300/HRB335/HRB400/HRB500 Reinforcement

1. How to get samples to check the quality? How long can I get the samples?
After the price is confirmed, samples can be provided for your evaluation. After confirming the sample details, the samples will be ready for delivery within 3-7 days, and sent to you by courier, and arrive within 3-5 days.
2.Do you provide samples ? is it free or extra ?
Answer:The sample could can provide for customer with free,but the courier freight will be covered by customer account.
3. Do you accept the third party inspection?
Answer: Yes absolutely we accept.
4.Can you accept customization?
Answer:Yes. If you have special requirements on products or packages, we can do customization for you.
5.How do you control the quality?
Answer:We have professional inspectors to analyze chemical composition of raw materials and test the finished products strictly according to standard stipulated in the contract. In this process, Internal and external surfaces, two ends appearance, bending degree, fixed length, outer diameter and wall thickness dimension etc will be checked one by one. You can be assured that all the products you get from us are reliable.

We supply high-quality steel reinforcement bars including HPB300, HRB335, HRB400, and HRB500. These hot-rolled steel bars are manufactured according to Chinese standard GB1499.2-2018. HPB300 is a plain round bar with smooth surface, ideal for stirrups and wall reinforcement. HRB335, HRB400, and HRB500 are deformed ribbed bars (rebar) featuring excellent bond strength with concrete. Available diameters range from 6mm to 40mm, with standard lengths of 9m or 12m. Suitable for concrete reinforcement in buildings, bridges, roads, and other civil engineering projects. Yield strength: 300MPa, 335MPa, 400MPa, and 500MPa respectively. Quality meets international standards.

◉ Product Details

Grade	Old Grade Name	Surface Type	Yield Strength (MPa)	Common Diameters	Main Application
HPB300	Grade I	Plain / Smooth	≥300	6-12mm	Stirrups, wall reinforcement
HRB335	Grade II	Deformed / Ribbed	≥335	12-25mm	Beams, columns, shear walls in medium/large structures
HRB400	Grade III	Deformed / Ribbed	≥400	6-40mm	General concrete reinforcement (most common grade)
HRB500	Grade IV	Deformed / Ribbed	≥500	12-50mm	Large prestressed structures, heavy-load buildings

◉ Key Features

HPB300: High ductility, excellent weldability, smooth surface for easy bending
HRB335: Good balance of strength and workability, suitable for general construction
HRB400: High strength, superior bond with concrete, most widely used grade
HRB500: Ultra-high strength, reduces steel consumption, for heavy-duty projects

◉ Technical Specifications (Typical)