Technical guide with sources · ROLL Lab
Paper cores for aluminium and metal strip
In shortAluminium and steel strip is heavy and wound under tension: it needs thick-walled cores, extra-strong board and verified radial strength.
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High loads and tension
A metal coil is heavy and wound at high tension: the core takes both a crushing load and radial pressure. 6" or larger diameters, walls from 12 to 20 mm and high-density board are common.
What to specify
- Flat crush to ISO 11093-9 and radial crush in bar, with the method.
- Bending stiffness for wide coils.
- Low, stable moisture: cold metal can cause condensation.
- Ends and surface that do not mark the strip.
Sources
- ISO 11093 (parts 6, 7, 8, 9)
- ISO 13542
- CCTI T-158, T-159
- ROLL Lab calculation
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