Aluminum coil 5182 h19 is a super hard 5182 aluminium alloy. The hardness of 5182 ranks medium in 5000 alloys, but H19 indicates a state even stronger than H18. H1x, indicating simple work hardening state. The second digit, indicating the final work hardening degree of the product, is 1-9. The number 9 is super hard state, which is represented by …