The allowable deviation of the STEEL WIRE diameter of 6-10mm is plus or minus 0.40, and the allowable deviation of out-of-roundness is less than or equal to 0.50. The surface of the steel wire rod must not have cracks, folds, etc. Indentations, local bumps, concave blocks, scratches, pits, etc. are allowed. , but its attempted (actual size) is not larger than 0.2mm. The surface of the disk is iron oxide scale, also known as the decarburized layer. The color is dark . When observed with the naked eye, the heavier the color, the better the texture.

High-strength prestressed steel wire is an economical and efficient steel material with high tensile strength and yield strength, good plasticity, and low relaxation performance. It is widely used in the construction of cement products, bridges, nuclear power plants, high-rise long-span buildings, highways, etc.
 
Wire rod is round steel with a relatively small diameter. The product form is rolled into a coil and supplied. Common ones on construction sites are 6, 8, 10, and 12 mm in diameter. They are mostly made of low carbon steel and are generally not used for the main bars of reinforced concrete structures. , mostly used to make steel bar sleeves, and small-diameter ones are used for "brick reinforcement" in brick-concrete structures.

Type

There are many varieties of wire rod. Among carbon steel wire rods, low carbon steel wire rods are commonly known as soft wires, while medium and high carbon steel wire rods are commonly known as hard wires. Wire rod is mainly used as blank for drawing, and can also be directly used as building materials and processed into mechanical parts. Stainless steel wire rod is used to make stainless steel wire, stainless steel spring steel wire, stainless steel upset steel wire and stainless steel wire rope. With the advancement of production technology, square,
Hexagonal, sector-shaped and other special-shaped wire rods; the upper limit of diameter has been expanded to 38 mm; the plate weight has increased from the original 40-60 kg to 3,000 kg. Due to the development of a new post-rolling heat treatment process, the iron oxide scale on the surface of the wire rod has been significantly thinned, and the structural properties have also been greatly improved.

Wire rods need to be straightened and cut using a steel bar straightening machine before use. At the same time, the oxidized scale is removed in the machine, and the strength is improved to a certain extent during repeated bending and stretching. For small construction sites that do not have a straightening machine, it is not advisable to use a winch to straighten the wire rod. Direct pulling is not advisable as it may easily cause too much plastic deformation. A pulley weight should be used at one end to control the pulling force.