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Non-round, 3P cans require: excellent axial resistance for safe transportation; panelling resistance to withstand retorting pressure constraints; and dent resistance.
For efficient production, grades exhibiting high-speed welding and flanging performance should be selected.
The smaller curvature radius of rectangular cans makes flanging more difficult. Softer grades, typically with a yield strength of ≤ 415 MPa, are recommended.
Metallic coating: Tin coating only (ECCS not weldable).
Corrosion resistance: Tin coating must be selected based on the aggressiveness of the food.