Delong Metal is group company in the steel manufacture & Trading, founded in the 2000s, 800+ staff, 25, 000+ m2 non-dust workshop, 40+ great large mills and cooperation partners in China, 4000, 000+ MT production per year under ISO management, 40, 000+customers in domestic and overseas market, 10 billion USD of annual turnover, 15+ subsidiary companies all over China, ranking the Top 100 private enterprises in China, 1 hour reach Shanghai/Tianjin /Guangzhou Port, we keep high quality, competitive price, thousands tons of stock, most efficient delivery and reliable cooperation for global valued customers.
Steel rebar is a ribbed steel bar on the surface, also known as ribbed steel bar, usually with two longitudinal ribs and transverse ribs evenly distributed along the length. The shape of the transverse ribs is spiral, herringbone, and crescent. It is expressed in millimeters of the nominal diameter. The nominal diameter of ribbed steel bars is equivalent to the nominal diameter of smooth round steel bars with equal cross-sections. The nominal diameter of the steel bars is 8-50 mm, and the recommended diameters are 8, 12, 16, 20, 25, 32, and 40 mm. Ribbed steel bars mainly bear tensile stress in concrete. Ribbed steel bars have greater bonding capacity with concrete due to the action of ribs, so they can better withstand external forces.
| Construction Deformed Steel Bar | |
| Product Name | steel rebar ; deformed steel bar |
| Diameter(mm) | 6mm-50mm or be required |
| Length | customized |
| Size | According to our customer |
| Material Grade | HRB235、Q235 |
| HRB335、HRB335E、HRBF335E | |
| HRB400、HRB400E | |
| HRB500、HRB500E,HRBF500E | |
| Standard | DIN GB ISO JIS BA ANSI |
| Surface | Requirement |
| Technique | Hot Rolled / Forged / Cold Drawn |
| Application | Building construction, construction concrete |
| Dia.(mm) | Weight(kg/m) | Dia.(mm) | Weight(kg/m) |
| 5 | 0.154 | 22 | 2.984 |
| 6 | 0.222 | 24 | 3.551 |
| 8 | 0.395 | 25 | 3.853 |
| 10 | 0.617 | 26 | 4.168 |
| 12 | 0.888 | 28 | 4.83 |
| 14 | 1.208 | 30 | 5.549 |
| 16 | 1.578 | 32 | 6.31 |
| 18 | 1.998 | 36 | 7.99 |
| 20 | 2.466 | 40 | 9.87 |
| Mechanical Features | ||||
| STEEL GRADE | Tensile Strength | Yield Strength | Rm/Re | Elongation |
| Re MPa | Rm MPa | |||
| A3 (RB25A3) | 482 | 641 | - | 22% |
| A4 (RB25A4) | 528 | 666 | - | 20% |
| B500A | 500 | 0.6 | 1.05 | 2.5 |
| B500B | 500 | 0.45 | 1.08 | 5 |
| B500C | 500 | 0.65 | ≥1.15 | 7.5 |
| <1.35 | ||||
| Chemical Features | |||||||
| STEEL GRADE | C | Mn | Si | P | S | Cr | Cu |
| A3 (RB25A3) | 0.297 | 0.594 | 0.153 | 0.0156 | 0.0096 | 0.0167 | 0.207 |
| A4 (RB25A4) | 0.281 | 0.598 | 0.178 | 0.0131 | 0.0322 | 0.0679 | 0.201 |
| B500A | 0.8 | 0.2 | 0.35 | 0.04 | 0.04 | 0.08 | 110 |
| B500B | 0.7 | 0.03 | 0.07 | 0.03 | 0.03 | 0.07 | 100 |
| B500C | 0.9 | 0.2 | 0.35 | 0.04 | 0.04 | 0.07 | 110 |
| Grade Equivalency | ||
| GOST | ASTM | JIS |
| A1 | - | SR24 |
| A2 | A615G40 | SD35 |
| A3 | A615G60 | SD40 |
| - | A615G75 | SD50 |
We operate within the scope of ISO 9001: 2015 CE UL CCC accredited management system and the raw materials are procured from suppliers in compliance with ASTM, BS EN and DIN standards.Our products are rigorously inspected to ensure they are within tolerance of our customer′s specifications, we work with accredited laboratories for specialised material testing and chemical analysis.In addition, we use X-ray fluorescence technology to meet our high inspection standards and to ensure that our customers get the best quality products.
