1. Threaded steel:

The specification range of threaded steel is generally between 6-50mm, and the ones we usually deal with more often are 8 mm、10mm、12mm、14mm、16mm、18mm、20mm、22mm、25mm、28mm、32mm、36mm、40mm Wait. National allowable deviations: 6-12mm deviation within ± 7%, 14-20mm deviation within ± 5%, 22-50mm deviation within ± 4%.

Threaded steel is generally fixed at 9m and 12m in length, with 9m thread mainly used for normal road construction and 12m thread mainly used for bridge construction.

Threaded steel can be divided into three categories based on strength: HRB335, HRB400, and HRB500.

2. Wire:

The commonly used specifications are 6.5mm, 8.0mm, and 10mm (diameter); In addition, there are 5.5mm, 6.0mm, 7.0mm, and so on. At present, the maximum diameter of wire rods produced in China can reach 30mm. In addition, the production of wire rods generally allows a tolerance of ± 0.4mm.

The common grades of wire rods are generally divided into three types: Q195, Q215, and Q235. Among them, there are only two grades of wire rods for construction steel, Q215 and Q235; Example: Q235 (Q - refers to the yield strength of steel, 235 refers to a yield strength not less than 235Mpa).

Wire can be divided into general wire, high wire, and quasi high wire according to rolling speed

3. Panluo:

Building steel, as the name suggests, is threaded steel that is coiled together like wire, and the most commonly available ones on the market are 6.5-8.0-10-12-14.

Advantages of disk screws: Threaded steel is only available in 9-12 sizes, while disk screws can be cut as needed.

4. Round steel:

Round steel refers to a solid strip of steel with a circular cross-section. Its specifications are expressed in millimeters of diameter, such as "50" representing round steel with a diameter of 50 millimeters.

Round steel material: 10 #, 20 #, 35 #, 45 #, 304, 316, 20 Cr、40Cr、20CrMo、35CrMo、42CrMo、40CrNiMo、GCr15、65Mn、50Mn、50Cr、3Cr2W8V、20CrMnTi、5CrMnMo Wait.

Round steel is divided into three types: hot-rolled, forged, and cold drawn. The specification of hot-rolled round steel is 5.5-250 millimeters. Among them, 5.5-25mm small round steel is mostly supplied in bundles of straight bars, commonly used as steel bars, bolts, and various mechanical parts; Round steel larger than 25 millimeters is mainly used for manufacturing mechanical parts or making seamless steel pipe blanks.

The function of building steel:

Threaded steel is widely used in various building structures.

Wire is not only widely used as reinforcement for building reinforced concrete, but also suitable for wire drawing and mesh wire (special steel).