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Mounting cups close the aerosol after filling and must resist the high internal pressure. They require packaging steel grades with high formability and controlled anisotropy. The steel should be delivered as lacquered slit coils, ready to feed into the press. If the aerosol mounting cup is to be lacquered, coil-coated steels are required.
Batch annealed grades are normally used.
Metallic and organic coating:
Tin coating (E5.0/5.0) with 300 passivation when delivered lacquered
Tin coating (E7.5/7.5) with passivation 311 when delivered uncoated