High-Strength MR Electrolytic Tin Plate Coils for Food Can Lids - TH415/TH550/TH580 Hardness Electrolytic Tin Plate (ETP) represents advanced cold-rolled low-carbon steel precision-coated with pure tin on both surfaces, specifically engineered for demanding packaging applications. Our MR-grade tinplate coils and sheets offer exceptional mechanical properties with hardness levels ranging from TH415 to TH580, making them ideal for manufacturing durable food can lids, aerosol