| 品牌 | 东升 |
|---|
棕刚玉
棕刚玉是以铝矾土为主要原料，经高温溶炼而成。呈棕褐色、硬度高、韧性大。用其制造的磨具，适用于碳素钢、可锻铸铁、硬青铜等的磨削。此外在耐火材料、化工添加剂、精密铸造及防滑材料等方面也有广泛应用。
The main material lr brown fused alumina is bauxite.which is electrically fused in high temperature.it is brown and featured high hardness and toughness.The abrasive tools made of it are suitable for the grinding of carbon steel.malleable cast iron,hard bronze.etc.ln addition.they are used as refractory materials,chemical additive,precision founding and anti-sliding materials
化学成份：
| 牌号（代号） Code | 粒度范围 Grit size range | 化学成分%Chemical composition% | ||
| Al2O3 | TiO3 | CaO | ||
| A A-P1 | F4-F80 (P12-P80) | 95.0-97.5 | 1.5-3.8 | ≤0.45 |
| F90-F150 (P100-P150) | 94.0-97.5 | |||
| F180-F220 (P180-P220) | 93.0-97.5 | |||
| F220(P220) | ≥92.0 | |||
物理性能：
Physical property
| 基本矿物 Basic minerals | 晶体尺寸 Crystal size μm | 真比重 True density g/cm3 | 堆积密度 Bulk density g/ cm3 | 显微硬度 Knoop hardness kg/mm2 |
| α-Al2O3 | 300-12000 | ≥3.90 | 1.5-1.95 | 1800-2200 |
Water-washed P grains of brown fused alumina
| 粒度号Grit size | 清洁度Cleanness |
| AP50 | 120 |
| AP80 | 130 |
The shaped brown fused slumina
| 粒度号 Grit size | 堆积密度 Bulk density g/cm3 | 粒度号 Grit size | 堆积密度 Bulk density g/cm3 |
| F24 | 1.8-1.95 | F80 | 1.61-1.71 |
| F30 | 1.77-1.90 | F90 | 1.59-1.71 |
| F36 | 1.75-1.90 | F100 | 1.57-1.68 |
| F40 | 1.73-1.86 | F120 | 1.54-1.68 |
| F46 | 1.70-1.84 | F150 | 1.50-1.65 |
| F54 | 1.68-1.82 | F180 | 1.48-1.62 |
| F60 | 1.66-1.80 | F220 | 1.45-1.55 |
| F70 | 1.63-1.76 | ||