Coil coat aluminum 3105 h14 for pilproof cap is 0.012mm to 0.5mm thick, with good deep drawing and printing property. 3105 h14 aluminum has not been heat-treated, and its hardness if half hard in comparison to H18. It contains 98% aluminium and 0.3% copper. The adding of copper greatly improves its electricity conductivity. Like 1xxx aluminium, 3xxx cannot be heat …