HSS roll (referred to as high-speed steel roll) is the hot rolling material with hardness HSD82-86 of the working layer(the highest hardness HSD93). High-speed steel, known as wind steel or sharp steel, is a complex alloy steel with a complex composition, containing carbide-forming elements such as W, Mo, Cr, V, etc. The total amount of alloy elements is about 10% to 25%. TINVO HSS roll conforms to ISO, GB, ASTM, DIN, JIS.