... usage: Material for zinc, copper coated wire, standard bolts, common structures High Carbon Steel Wire Rod for Prestressed Concrete 1) Sizes ... material for bronze coated and zinc coated steel wire, construction materialCold Heading Steel Wire Rod 1)Steel grade: SWRCH15A, SWRCH22A, SWRCH35K ... , ML08Al, ML15Al 2)Diameter: 5.5mm-12mmWelding Steel Wire Rod 1)Steel grade: ER50-6, ER70S-6, H08A, ...