steel rod for tire bead wire wire rod C70DA, C72DA, C80DA, C82DA, C88DA and C92DA Under the ... of wire rod for tire bead wire are C70DA, C72DA, C80DA, C82DA, C88DA and C92DA. Because of the large drawing deformation the steel is ... required to have fewer contents of S and P, less impurity and accurate rolling tolerance. Steel Rod for Tire Bead Wire