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Steel is the ideal material for aerosol cans. For 2-piece (2P) or monoblock aerosols, pressure resistance is provided by the bottom. Pressure resistance comes from a combination of the steel’s thickness and hardness.
As ironing and necking steps are required, hard grades cannot be used. In this case, soft grades are required.
Metallic coating: Tin coating (ECCS is not suitable for ironing). A differential tin coating with a higher tin coating rate outside the can is recommended for the ironing step. Passivation 311 is the most widely used but Passivation 300 is possible if improved wettability is required.
