Compacted Additives
Compacted alloying additives also (known as ALTAB™) are a mixture of hardener elements such as Mn, Cr, Fe, Ti and Cu compacted with high grade aluminum powder. Compacted additives have a slower recovery time and lower recovery rate than that of master alloys as the elements in question are not in solution with aluminum. However, many cast-house operations have adopted an economical practice that includes the use of both high concentration compacted additives and lower concentration hardener waffle to achieve the desired recovery and productivity results.