01

Bending Aluminum Sheet and Plate

Approximate Radii for 90 Cold Bend^{1 2 3 4 5 6}

Alloy	Temper	RADII FOR VARIOUS THICKNESSES EXPRESSED IN TERM OF THICKNESS “t”
Alloy	Temper	1/64	1/32	1/16	1/8	3/16	1/4	3/8	1/2
1100	O H12 H14 H16 H18	0 0 0 0 1t	0 0 0 1/2t 1t	0 0 0 1t 1-1/2t	0 1/2t 1t 1-1/2t 2-1/2t	1/2t 1t 1t 1-1/2t 3t	1t 1t 1-1/2t 2-1/2t 3-1/2t	1t 1-1/2t 2t 3t 4t	1-1/2t 2t 2-1/2t 4t 4-1/2t
2024	O T3 T361⁶ T4 T81 T861⁶	0 2-1/2t 3t 2-1/2t 4-1/2t 5t	0 3t 4t 3t 5-1/2t 6t	0 4t 5t 4t 6t 7t	1/2t 5t 6t 5t 7-1/2t 8-1/2t	1t 5t 6t 5t 8t 9-1/2t	1t 6t 8t 6t 9t 10t	2-1/2t 7t 8-1/2t 7t 10t 11-1/2t	4t 7-1/2t 9-1/2t 7-1/2t 10-1/2t 11-1/2t
3003	O H12 H14 H16 H18	0 0 0 1/2t 1t	0 0 0 1t 1-1/2t	0 0 0 1t 2t	0 1/2t 1t 1-1/2t 2-1/2t	1/2t 1t 1t 2-1/2t 3-1/2t	1t 1t 1-1/2t 3t 4-1/2t	1t 1-1/2t 2t 3-1/2t 5-1/2t	1-1/2t 2t 2-1/2t 4t 6-1/2t
5005	O H12 H14 H16 H18 H32 H34 H36 H38	0 0 0 1/2t 1t 0 0 1t 1-1/2t	0 0 0 1t 1-1/2t 0 0 1t 1-1/2t	0 0 0 1t 2t 0 0 1t 2t	0 1/2t 1t 1-1/2t 2-1/2t 1/2t 1t 1-1/2t 2-1/2t	1/2t 1t 1-1/2t 2-1/2t 3-1/2t 1t 1-1/2t 2-1/2t 3-1/2t	1t 1t 1-1/2t 3t 4-1/2t 1t 1-1/2t 3t 4-1/2t	1t 1-1/2t 2t 3-1/2t 5-1/2t 1-1/2t 2t 3-1/2t 5-1/2t	1-1/2t 2t 2-1/2t 4t 6-1/2t 2t 2-1/2t 4t 6-1/2t
5052	O H32 H34 H36 H38	0 0 0 1t 1t	0 0 0 1t 1-1/2t	0 0 1t 1-1/2t 2-1/2t	0 1t 1-1/2t 1-1/2t 2-1/2t	1/2t 1-1/2t 2t 2-1/2t 3t	1t 1-1/2t 2-1/2t 3-1/2t 5t	1-1/2t 1-1/2t 2-1/2t 4t 5-1/2t	1-1/2t 2t 3t 4-1/2t 6-1/2t
5086	O H32 H34 H36	0 0 1/2t 1-1/2t	0 1/2t 1t 2t	1/2t 1t 1-1/2t 2-1/2t	1t 1-1/2t 2 3t	1t 1-1/2t 2-1/2t 3-1/2t	1t 2t 3t 4t	1-1/2t 2-1/2t 3-1/2t 4-1/2t	1-1/2t 3t 4t 5t
5454	O H32 H34	0 1/2t 1/2t	1/2t 1/2t 1t	1t 1t 1-1/2t	1t 2t 2t	1t 2t 2-1/2t	1-1/2t 2-1/2t 3t	1-1/2t 3t 3-1/2t	2t 4t 4t
6061	O T4 T6	0 0 1t	0 0 1t	0 1t 1-1/2t	1t 1-1/2t 2-1/2t	1t 2-1/2t 3t	1t 3t 3-1/2t	1-1/2t 3-1/2t 4-1/2t	2t 4t 5t
7075	O T6	0 3t	0 4t	1t 5t	1t 6t	1-1/2t 6t	2-1/2t 8t	3-1/2t 9t	4t 9-1/2t

The radii listed are the minimum recommended for vending sheets and plates without fracturing in a standard press brake with air bend dies. Other types of bending operations may require larger radii or permit smaller radii. The minimum permissible radii will also vary with design and condition of the tooling
Alclad sheet in the heat-treatable alloys can be bent over slightly smaller radii than the corresponding tempers of the bare alloy.
Heat-treatable alloys can be formed over appreciably smaller radii immediately after solution heat treatment.
The H112 temper (applicable to non-heat treatable alloys) is supplied in the as fabricated condition without special property control but usually can be formed over radii applicable to the H14 (or H34) temper or smaller.
The reference test method is ASTM E290.
Tempers T361 and T861 formerly designated as T36 and T86, respectively.