... delivery time reply within 12 hours ISO9001, SGS High alumina ball is broadly utilized as the covering or ... it, for instance, the stronger resistance to high temperature and high pressure, lower ratio of the moisture absorbing, ... 2.0Water sorption, (%)<3<1Acid resistance(%)>98Alkali resistance(%)>80>82>85>90>95Spalling resistance(°C)>250>300> ... volume, and remain 15-20% margins high alumina packing ball