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The most complete sheet metal bending allowance table

Common bending allowance table

Material Thickness V slot Angle Bending allowance
Steel plate, fingerprint resistant plate, aluminum zinc coated plate 1 8(30°) 30 0
45 0.5
60 1
75 1.4
7 90 1.8
105 1.2
120 0.8
135 0.5
150 0.3
165 0.2
1.2 8(30°) 30 0.2
45 0.7
60 1.1
75 1.7
7 90 2
105 1.4
120 1
135 0.6
150 0.4
165 0.2
1.5(actual 1.4) 8(30°) 30 0.5
45 0.9
60 1.4
75 1.9
10 90 2.6
105 1.8
120 1.2
135 0.8
150 0.5
165 0.2
Steel plate 2 12(30°) 30 0.6
45 1.3
60 1.9
75 2.5
12 90 3.5
105 2.4
120 1.6
135 1.1
150 0.7
165 0.3
2.5(actual 2.4) 12(30°) 30 1.2
45 1.8
60 2.4
75 3.2
16 90 4.4
Steel plate 2.5(actual 2.4) 16 105 3
120 2.1
135 1.3
150 0.8
165 0.4
3(actual 2.9) 57°die 60 2.9
75 3.8
18 90 5.2
105 3.6
120 2.4
135 1.6
150 1
165 0.5
Steel plate 4(actual 3.9) 25 90 6.7
105 4.8
120 3.3
135 2.2
150 1.3
165 0.6
4.5(actual 4.3) 25 90 7.3
105 5.2
120 3.5
135 2.4
150 1.4
165 0.7
5(actual 4.8) 40 90 9
105 6.5
120 4.3
135 2.8
150 1.7
165 0.8
6 40 90 10
105 7.4
120 5
135 3.3
150 2
165 0.9
Milled aluminum plate 1.2 7 90 1.5
1.5 10 90 2
Steel plate, aluminum zinc coated plate Bilayer 1.5 18 90 Inner 2.6 Outer 3.4
Bilayer 2 25 90 Inner 3.2 Outer 4.1
PVC 3 15(30°) 90 5

The bending allowance table is applicable to the corresponding material, material thickness and angle.

If the material thickness and angle in the table are not met, the following table can be used to calculate:

the bending allowance of the corresponding angle = material thickness * multiple of the corresponding angle 2.65-2.4

Angle Multiple of material thickness
60 1
65 1.1
70 1.3
75 1.5
80 1.6
85 1.7
90 1.8
95 1.6
100 1.4
105 1.2
110 1.1
115 1
120 0.8
125 0.7
130 0.6
135 0.55
140 0.5
145 0.3
150 0.33
155 0.3
160 0.2
165 0.15
170 0.1
175 0.1

For example, the material thickness is 3, the material is ordinary steel, the bending angle is 95 degrees, and the corresponding bending coefficient = 3 * 1.6 = 4.8

The bending allowance table requires the non-right angle dimensions to be marked and measured as follows:

bending allowance table requires the non-right angle dimensions to be marked and measured

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