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Material Use

Materials used in extrusion:

Metals and alloys: Brass, copper, lead, aluminum, steel, magnesium, tin, titanium, and zinc.

Thermoplastics: ABS, Acrylic, Butyrate, Flexible Vinyl, PETG Co-Polyester, Polycarbonate, Polyethylene- High & Low Densities, Polypropylene, Polystyrene, Polyurethane, Rigid Vinyl, Thermoplastic Elastomer.

Following is a table of materials and their ranking. The ranking indicates the material suitability for the extrusion process.

A value of zero means that the corresponding material is never used with this process, a ranking of 100 means that it is excellent for use with this process.

Properties of extruded materials:

Deformation is greater in the outer zones of a bar than it is at the center, particularly when the extrusion ratio is low. The center receives only light deformation.

The improvement in tensile strength of Al 1100 resulting from extrusion with 3:1 ratio is 5000 psi (before extrusion) to 19000 psi (after extrusion). In general, the yield strength is increase about four times the initial strength.

In general, the inside surfaces of backward extruded parts are 5 to 25 Rockwell-B Hardness harder than the outside surfaces. The hardness of material alloys which undergo this backward extrusion process is decreased by 20 to 10 Rockwell-B Hardness. However in forward extrusion the outer surfaces are harder than the inner surfaces.