a.precision:0.00-0.30mm;b.fine polishing abrasive:0.30mm;c.linear accuracy:0.20mm/m;d.chemical composition and mechanical proper 1.Features:having a good plasticity, toughness, weldability, cold performance, and a certain degree of intensity2.Uses:mass production of steel plate, profiled bar, steel bars, room frame, high-voltage transmission towers, bridges, and vehicles