Aluminum scrap baler density and bale size vary significantly depending on the material type (e.g., loose cans vs. heavy extrusions) and the specific baler model used.

Generally, high-density industrial balers can achieve densities above 350kg/m3 (approximately 22lb/ft), while specialized equipment can produce ultra-dense bales weighing up to 3,000 lbs for transport to smelting facilities

Bale Densities for Aluminum Scrap 

The density of a finished aluminum bale is largely determined by the initial form of the scrap and the hydraulic force of the baler. 

Used Beverage Cans (UBC): Standard densities range from 14to17lb/ft3

 (225to 273kg/m3) for unflattened cans, and up to 22lb/ft3 353kg/m3) for flattened cans.

Industrial Scrap/Extrusions: High-density balers can produce "tight" aluminum bales with densities reaching up to 50% of the liquid molten weight of the material.

Comparison to Raw Aluminum: For reference, the theoretical solid density of pure aluminum is approximately2,699kg/m3(169lb/ft3). 

Standard Bale Sizes and Weights 

Bale sizes are often influenced by the dimensions of the foundry furnace where they will eventually be melted. 

Baler Equipment Specifications 

The size of the baler machine itself typically scales with the size of the bale it produces. 

Machine Force: Aluminum cans (UBC) and thin scraps generally require lower tonnage, typically 30–40 tons of pressure. Heavier industrial scrap with "memory" (spring-back) may require 60–100 tons or more to maintain high density.

Chamber Customization: Most balers have fixed press box dimensions, but some manufacturers offer custom sizes to meet specific storage or transportation requirements.

Bale Shapes: While cuboid is the most common and cost-effective, some balers can produce octagonal or cylindrical bales for specific furnace mouths.