Ferro Silicon – Chemical Analysis Si 75 – 80% Al 1 % & 1.5 % Max C 0.1% Max S 0 . 04% Max P 0 . 04% Max Size 10 – 50MM – Min 90% or as required by end user 10 – 100MM – Min 90% or as required by end user Ferro Silicon – Chemical Analysis Si 70 – 75% Al 1% 1.5%Max C 0.1% Max S 0 . 04% Max P 0 . 04% Max Size 10 – 50 mm – Min 90% or as required by end user 10 – 100 mm – Min 90% or as required by end user