Product specification:  Diameter:Φ300-Φ520  Roll width:40-130mmProduct performance:  HRC61~63  The groove life is same as tungsten carbide roll while the redressing amount is about 1.2-1.6 times that of a tungsten carbide roll.Roll material: Tungsten-Molybdenum serial high carbon high Vanadium steel with total alloy amount at 20~25%  W16:  W EQ=16 _ Reaches W EQ of HSS (WEQ >15)  All other tool steel roll WEQ is below 15,Website:http://www.kyhssrolls.com,similar to that of Mould steel  WEQ = W PERCENTAGE + 2 x Mo PERCENTAGE.  Single piece casting,density=8.05x103kg/m3.Properties:  No chemical segregation  Uniform base material, stable microstructure  Uniform hardness(HRC±1),low attenuation  Excellent red-hardness, wear resistance and impact load capacity  No cracking nor pitting during rolling  Uniform wear along the groove, smooth groove surface