L’ossido di alluminio marrone viene fuso elettricamente in un forno ad arco da una miscela di bauxite ad alta temperatura. Ha un colore marrone, elevata durezza e grande tenacità. Gli utensili abrasivi realizzati in ossido di alluminio marrone sono adatti per la molatura di acciaio al carbonio, acciaio legato normale, ghisa malleabile e bronzo duro. Viene utilizzato per la miscela di rivestimento in ossido di alluminio refrattario, materiali di colata fusibili, ecc.
Grado abrasivo:
| MISURARE | Al2O3 MINIMO | SIO2 Massimo | TiO2 Massimo | Fe2O3 Massimo |
| Da 12# a 80# | 94,5-97% | 0,6-0,8% | 1,5-3% | 0,12-0,2% |
| Da 100# a 180# | 93,5% | 0,7-1% | 1,5-3,8% | 0,15-0,25% |
| Da 240# a 280# | 92% | 0,85-1,1% | 1,5-3,8% | 0,18-0,35% |
Applicazioni tipiche:
- applicazioni incollate o rivestite
- finitura o preparazione della superficie
- rimozione del rivestimento o della scala
- lucidatura
- superfici antiscivolo
Adatto per questi materiali:
- acciaio legato ferroso o normale
- ceramica
- plastica
- calcolo
- bicchiere
- legna
- gomma
- materiali compositi
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