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.