Also known as wire rod, usually it refers to a small-diameter round plate. Wire rod diameter in the range of 5 to 19 mm range (usually about 6 to 9 mm), the lower limit is the minimum size of hot-rolled steel section. Many varieties of wire rod. Carbon steel wire rod in the low-carbon steel wire rod known as cord, medium and high carbon steel wire rod, commonly known as hard-line. Wire rod for drawing mainly for blank, may also be used as building materials and processed into mechanical parts. Stainless steel wire rod for the manufacture of stainless steel wire, stainless steel spring wire, stainless steel wire and stainless steel wire rope upsetting wire. With the advances in production technology, it has emerged square, hexagonal, fan-shaped cross section and other wire rod; the upper limit has been expanded to a diameter of 38 mm; heavy plate from the original 40 to 60 kg has increased to 3000 kg. Due to the development of new heat treatment after rolling process, wire rod surface oxide scale obviously thinning, organizational performance has been greatly improved. Rod is a relatively small diameter round, rolled into plate product form is available on the site are common 6,8,10,12 mm diameter, mostly in low-carbon steel, it is generally not used for reinforcement of reinforced concrete structures for brick structure used for the manufacture of reinforced sleeve, and the small diameter of the "brick reinforcement." Rod before use with steel straightening machine tone down the material, but also the machine to remove the oxide rust skin, but also repeated bending stretching, strength has improved to some extent. No straightening machine for small sites, use hoist straightened wire rod, if it is a direct pull is not desirable, too prone to plastic deformation, should end with a pulley weight to control the tension.