8021 Aluminum Foil. 8021 aluminium foil for stove contains lithium, so they can be a little hard, yet still flexible enough to be bent without breaking up. We can use them as aluminium foil on stove top, or aluminum foil in oven bottom. Alloy: AA8021. Temper:O, H12, H14, H16, H18, H22, H24, H26, H28. Thickness:.2mm.