棕色氧化鋁是在高溫下由鋁土礦混合物在電弧爐中電熔而成的。它顏色為棕色，硬度高，韌性好。棕剛玉製成的磨俱適用於研磨碳鋼、普通合金鋼、可鍛造鑄鐵、硬青銅，用於耐火材料氧化鋁內襯混合物、澆注材料澆注料等。
磨料等級：
| 尺寸 | 氧化鋁 分分鐘 | 二氧化矽 最大限度 | 鈦酸二甲酯 最大限度 | 氧化鐵 最大限度 |
| 12#-80# | 94.5-97％ | 0.6-0.8％ | 1.5-3％ | 0.12-0.2％ |
| 100#-180# | 93.5％ | 0.7-1％ | 1.5-3.8％ | 0.15-0.25％ |
| 240#-280# | 92％ | 0.85-1.1％ | 1.5-3.8％ | 0.18-0.35％ |
典型應用：
- 黏合或塗層應用
- 表面處理或準備
- 塗層或氧化皮去除
- 拋光
- 防滑表面
適用於這些材料：
- 黑色鋼或普通合金鋼
- 陶瓷
- 塑膠
- 結石
- 玻璃
- 木頭
- 橡皮
- 複合材料
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