... Good abrasion resistance; 4) ISO9001:2008 1)We produced the tyre protection chains, that retain the traditional steel products, but also ... , road construction, dam engineering, quarry and steel plant operations.Tyre Protection Chain: We use special alloy component to the ... face rockwell hardness(HRC) 52-58 degrees.we can assure product quality in hardness,tenacity,wear-resisting &a super long ...