ASTM A615 covers deformed and plain carbon steel bars for concrete reinforcement. This specification covers bars and coils in four grades, Grade 40, Grade 60, Grade 75, and Grade 80. The grade designates the yield strength of the material, i.e. Grade 60 has a 60ksi minimum yield.
A615 Designation Numbers
| Bar No. | Nominal Diameter |
|---|---|
| 3 | 0.375” |
| 4 | 0.500” |
| 5 | 0.625” |
| 6 | 0.750” |
| 7 | 0.875” |
| 8 | 1.000” |
| 9 | 1.128” |
| 10 | 1.270” |
| 11 | 1.410” |
| 14 | 1.693” |
| 18 | 2.257” |
A615 Mechanical Requirements
| Grade 40 | Grade 60 | Grade 75 | Grade 80 | |
|---|---|---|---|---|
| Tensile, ksi | 60 | 90 | 100 | 105 |
| Yield, ksi | 40 | 60 | 75 | 80 |
| Elongation in 8” | ||||
| Bar size #3 | 11 | 9 | 7 | 7 |
| 4,5,6 | 12 | 9 | 7 | 7 |
| 7,8 | - | 8 | 7 | 7 |
| 9 thru 18 | - | 7 | 6 | 6 |
A615 Bend Test Requirements
| Bar Designation# | Pin Dia. Grade 40 | Pin Dia, Grade 60 | Pin Dia, Grade 75 | Pin Dia, Grade 80 |
|---|---|---|---|---|
| 3,4,5 | 3-1/2d | 3-1/2d | 5d | 5d |
| 6 | 5d | 5d | 5d | 5d |
| 7,8 | - | 5d | 5d | 5d |
| 9,10,11 | - | 7d | 7d | 7d |
| 14,18 | - | 9d | 9d | 9d |
Weldability
Welding this material should be approached with caution since no specific provisions have been included to enhance weldability. If weldable rebar is required, rebar per ASTM A706 should be considered.