| After-sales Service: | Cutting, Bending |
|---|---|
| Warranty: | / |
| Length: | 6m,9m,12m as Customer |
|
Still deciding? Get samples of $ !
Request Sample
|
Suppliers with verified business licenses
Audited Supplier Audited by an independent third-party inspection agency
Carbon Steel Rebar (short for reinforcing bar) is a ribbed steel bar used to strengthen concrete structures by providing tensile strength. Made primarily from carbon steel (low to medium carbon content), it is the most common type of rebar due to its cost-effectiveness, durability, and adaptability in construction.
| Rebar Size (#) | Diameter (inches) | Diameter (mm) | Weight (lb/ft) | Weight (kg/m) | Common Grades |
|---|---|---|---|---|---|
| #3 | 0.375" | 9.5 mm | 0.376 | 0.560 | Grade 40, 60 |
| #4 | 0.500" | 12.7 mm | 0.668 | 0.994 | Grade 40, 60 |
| #5 | 0.625" | 15.9 mm | 1.043 | 1.552 | Grade 40, 60, 75 |
| #6 | 0.750" | 19.1 mm | 1.502 | 2.235 | Grade 60, 75 |
| #7 | 0.875" | 22.2 mm | 2.044 | 3.042 | Grade 60, 75 |
| #8 | 1.000" | 25.4 mm | 2.670 | 3.973 | Grade 60, 75 |
| #9 | 1.128" | 28.7 mm | 3.400 | 5.060 | Grade 60, 75 |
| #10 | 1.270" | 32.3 mm | 4.303 | 6.404 | Grade 60, 75 |
| #11 | 1.410" | 35.8 mm | 5.313 | 7.907 | Grade 60, 75 |
| #14 | 1.693" | 43.0 mm | 7.650 | 11.38 | Grade 60, 75 |
| #18 | 2.257" | 57.3 mm | 13.60 | 20.24 | Grade 60, 75 |
| Grade | Diameter (mm/inch) | Yield Strength (MPa) | Common Use |
|---|---|---|---|
| Grade 40 | #3 (9.5mm) - #18 (57mm) | ≥280 MPa | Light-duty construction |
| Grade 60 | #3 (9.5mm) - #18 (57mm) | ≥420 MPa | Bridges, high-rise |
| Grade 75 | #6 (19mm) - #18 (57mm) | ≥520 MPa | Heavy infrastructure |
Key Sizes:
#3 (9.5mm), #4 (12.7mm), #5 (15.9mm), #8 (25.4mm), #10 (32mm).
| Standard | Equivalent Sizes | Notes |
|---|---|---|
| ASTM A615 | #3 (9.5mm) to #18 (57mm) | Most common in USA |
| GB/T 1499 | 6mm to 50mm | China standard (HRB400, HRB500) |
| BS 4449 | 6mm to 50mm | UK/EU standard (B500A/B/C) |
| Standard | Grades | Yield Strength (MPa) |
|---|---|---|
| ASTM A615 (U.S.) | Grade 40, 60, 75 | 280, 420, 520 |
| GB/T 1499 (China) | HRB400, HRB500 | 400, 500 |
| BS 4449 (UK/EU) | B500A, B500B, B500C | 500 |
Q: How to prevent carbon steel rebar from rusting?
A: Use epoxy coatings, galvanization, or ensure adequate concrete cover (min. 40mm).
Q: Can it be welded?
A: Yes, but high-carbon grades (e.g., Grade 75) require preheating to avoid cracks.
Q: Can I use ASTM rebar in non-US projects?
A: Yes, but check local codes (e.g., GB/T 1499 in China, BS 4449 in Europe).
Q: What's the difference between #5 and #6 rebar?
A: #5 = 15.9mm (1.55 kg/m), #6 = 19mm (2.23 kg/m) - thicker and stronger.
Q: Does ASTM rebar rust?
A: Uncoated (black) rebar can rust; specify epoxy-coated for corrosion resistance.
){kind=link}