5052 aluminum sheet for can lid

5052 and 5182 aluminum alloys are used for the can lids. 5052 alloy has a low magnesium content while the 5182 alloy is an alloy with a high magnesium content. In terms of manufacturing easy-open lids, 5052 alloy is used more, accounting for about 60% of the total, and the thickness is mostly 0.22-0.26mm.

5052 pre cut aluminum foil sheets are used for beverage caps and food caps without internal pressure, and 5182 is used for beverage caps with internal pressure. At present, the production process of 5052 aluminum alloy can lid is: casting → sawing → milling → homogenization annealing → hot rolling → 1 pass of cold rolling → 2 passes of cold rolling → 3 passes of cold rolling → cold rolling 4 passes→5 passes of cold rolling→annealing→stretch bending→coating→finished product shearing.

5052-h19 can lid material properties

Tensile strength: 270-330 Mpa

Yield strength: 240-300 Mpa

Elongation: ≧5

Thickness: 0.208-0.360 mm

Thickness tolerance: ±0.005

Width: 800-1730 mm

Width tolerance: +1.0

Quality requirements

Flatness:

1. the aluminum sheet oes not allow obvious waves, the wave height within 1 meter does not exceed 3mm, and the waves do not exceed 3/meter;

 
2. the side curvature on any 2000mm length should not be greater than 0.5mm; 

3. Within any length o 1500 mm, the height of the end warp should be ≤5mm.

Surface quality:

There are no serious bubbles, missed coatings, scratches, corrosion, oil spots, peeling, streaks, color differences, spots, roller marks, periodicity, etc. that affect the appearance quality of the product.