The internal radius R of press brake air bending is approximately 16% of the die opening V. You can use the press brake radius calculator to get the most accurate data.
Min Bending Radius
| No. | Materials | Min bending radius |
| 1 | 08, 08F, 10, 10F, DX2, SPCC, E1-T52, 0Cr18Ni9, 1Cr18Ni9, 1Cr18Ni9Ti, 1100-H24, T2 | 0.4t |
| 2 | 15, 20, Q235, Q235A, 15F | 0.5t |
| 3 | 25, 30, Q255 | 0.6t |
| 4 | 1Cr13, H62（M, Y, Y2, cold rolled） | 0.8t |
| 5 | 45, 50 | 1.0t |
| 6 | 55, 60 | 1.5t |
| 7 | 65Mn, 660SiMn, 1Cr17Ni7, 1Cr17Ni-Y, Cr17Ni-DY, SUS301, 0Cr18Ni9, SUS302 | 2.0t |
- The bending radius refers to the inner radius of the bending part, and t is the wall thickness of the material.
- t is the wall thickness of the material, M is the annealed state, Y is the hard state, and Y2 is the 1/2 hard state.