If your material contains a significant percentage of these metals then it will have some degree of magnetism to it.
Magnets for the sheet metal industry
Flexible Steel Vinyl Magnetically-Receptive Sheet
FlexMove Alpine Conveyors - Dorner Conveyors
Hold sheet metal and automotive metal panels firmly in a positive location for cutting, welding, tacking, painting and repair operations.Rare earth
Sheet Metal Magnets
Types of Magnetic Sheet Metal - Alpine Sheet Metal Systems
Sheet Steel Separator
Sheet Magnet Manufacturers
M-D Building Products 57321 Decorative Magnetic
FlexMove Alpine Conveyors - Dorner Conveyors
Types of Magnetic Sheet Metal - Alpine Sheet Metal Systems
M-D Building Products 57321 Decorative Magnetic
Steel Plate Lifting Magnets - Magnetic Sheet Metal Lifting Device
8.5 x 11-inch flexible steel sheet material. Sheet thickness is 0.025 inches Flexible Steel Vinyl Magnetically-Receptive Sheets are impregnated with
Flexible Steel Vinyl Magnetically-Receptive Sheet | 0.025in Thick | Letter Size 8.5x11 inch | Adhesive Backed Peel and Stick (1)
Flexible Steel Vinyl Magnetically-Receptive Sheet
Types of Magnetic Sheet Metal - Alpine Sheet Metal Systems