... 10B is a kind of regular Brown Aluminum Oxide abrasive with the elongated shaped and low bulk density. To ... grains, we specially process the ingots, separate the magnetic material, and sieve the grains carefully to get a complete ... 3.95Hardness 2090 Knoop scale, 9.0 Mohs scaleMagnetic Material 0.0076%Grain Sizes Available (F):12, 14, 16 ... -Standard 42-1:2006 or ISO 8486-1. abrasive sandblasting material