不同的，鋁材的折彎系數通常是板厚的一半，而鐵材、不銹鋼以及白鐵的系數則相同。以下為不同材質的折彎系數表：鐵材、不銹鋼及白鐵：鈑厚 | 系數 | 適用范圍 (內尺寸) --- | --- | --- 0.3 | 0 | -0.60 | > 2.3 0.4 | 0.1 | -0.70 | > 2.3 0.5 | 0.15 | -0.85 | > 2.3 0.6 | 0.2 | -1.00 | > 2.4 0.8 | 0.3 | -1.30 | > 2.4 1.0 | 0.4 | -1.60 | > 3.5 1.2 | 0.5 | -1.90 | > 4.0 1.4 | 0.55 | -2.25 | > 4.5 1.5 | 0.6 | -2.40 | > 4.5 1.6 | 0.6 | -2.60 | > 4.5 1.8 | 0.7 | -2.90 | > 5.5 2 | 0.7 | -3.30 | > 6.5 2.3 | 0.8 | -3.80 | > 7.5 2.5 | 0.8 | -4.20 | > 8.0 2.6 | 0.8 | -4.40 | > 8.0 3.0 | 1.0 | -5.00 | > 10.0 4.0 | 1.2 | -6.8 | > 13.0 4.5 | 1.3 | -7.7 | > 13.0 5.0 | 1.3 | -8.7 | > 22.0 6.0 | 1.5 | -10.5 | > 22.0 6.3 | 1.2 | -11.4 | > 27.0 6.35 | 1.2 | -11.5 | > 27.0 10 | 3.6 | -16.4 | > 36.0 鋁材：鈑厚 | 系數 | 適用范圍 (內尺寸) --- | --- | --- 0.50 | 0.25 | -0.75 | > 2.3 0.60 | 0.30 | -0.90 | > 2.4 0.80 | 0.40 | -1.20 | > 2.4 1.00 | 0.50 | -1.50 | > 3.5 1.20 | 0.60 | -1.80 | > 4.0 1.50 | 0.75 | -2.25 | > 4.5 1.60 | 0.80 | -2.40 | > 4.5 2.00 | 1.00 | -3.00 | > 6.5 2.30 | 1.10 | -3.50 | > 7.5 3.00 | 1.50 | -4.50 | > 10.0 4.00 | 2.00 | -6.00 | > 13.0 5.00 | 2.50 | -7.50 | > 22.0