Mechanical properties of metal container

Metal containers offer the advantage of sufficient strength and robustness to permit easy handling, filling and processing, storage and distribution and without damage. Metal containers also impermeability to mass transfer and to light, good thermal conductivity and resistance to relatively high temperature.

The main metals used in packaging are mild steel sheet, tinplate, terne plate, galvanized mild steel sheet, stainless steel, aluminum alloys and aluminium.

Axial strength
Resistance to buckling of can from top load. Axial strength is independent of the gauge of sheet metal and temper within the range of loads that would be normally applied.

Panelling resistance
Resistance to paneling is a function of gauge and strength of the side wall. It is resistance of the panel to external pressure and/or in-can vacuum. Panelling resistance is a function of sheet metal gauge and strength of side wall.

Peaking resistance
It is the resistance to internal pressure during the processing cycle. When the content is filled in the container, the gas in head space expands generating increasing pressure in can.
Mechanical properties of metal container