5.6/5.6 Heavy-Duty Electrolytic Tinplate Sheet for Industrial Can Lids This 5.6/5.6 heavy-coating electrolytic tinplate sheet in T4 temper is engineered for the most demanding industrial can lid stamping applications. With a robust tin coating mass of 5.6 g/m² on both surfaces, this material provides superior barrier protection against aggressive chemicals, solvent-based products, and corrosive industrial contents that would rapidly degrade standard tinplate packaging.