Rebar price
The main factors affecting the price of rebar are production cost, supply-demand relationship and speculation, which are restricted by many other factors. Speculation sometimes easily leads to irrational rise or fall of rebar prices. It is understood that since March this year, rebar prices have been in a weak decline, and relevant people have analyzed that this state will continue in a short time.
Rebar specification
The specifications of rebar are usually required to be listed in import and export trade contracts. Generally speaking, the specifications of steel bars should include standard brand, nominal diameter, nominal weight, specified length and allowable values of the above indicators. Nominal diameters recommended by steel bar standards are 6, 8, 10, 12, 16, 20, 25, 32, 40 and 50 mm. The supply length of steel bars can be divided into two types: fixed length and double length. The fixed length range of steel bars exported from China is 6 ~ 12m, and that exported from Japan is 3.5 ~ 10m. If there is no requirement for domestic and domestic steel bars in the contract, their lengths are usually 9m and 12m.
Rebar specification sheet:
Classification method of reinforcement
There are two common classification methods of steel bars: one is to classify according to the geometric shape of steel bars, and the other is to classify or classify according to the cross-sectional shape of transverse bars and the spacing between bars. For example, steel bars are classified into Type I and Type II in British Standard (BS4449). This classification mainly reflects the grip performance of steel bars. Second, according to the performance classification (grading), such as China's current implementation standards, rebar is (G? B 1499.2-2007), rebar is divided into three grades according to strength grade (yield point/tensile strength); Japanese industrial standard (Ji? SG3 1 12), rebar can be divided into five categories according to its comprehensiveness; British Standard (BS446 1) also stipulates the performance test of steel bars. Several grades. In addition, steel bars can also be classified according to their uses, such as ordinary steel bars for reinforced concrete and heat-treated steel bars for prestressed reinforced concrete.
Principle of steel bar weighing scale
Steel bar diameter (mm) multiplied by 0.006 17 multiplied by length l; 0.6 17 is the weight of circular 10 steel bar per meter. The weight of steel bars is proportional to the square of the diameter (radius).
C/m？ =? 0.6 17*D*D/ 100
Weight per meter (kg) =? Rebar diameter (mm) × rebar diameter (mm) × 0.00 17
Note: rebar below φ 12 (including 12) and φ 28 (including 28) shall generally take three decimal places, and rebar from φ 14 to φ 25 shall generally take two decimal places.
How much is a ton of rebar?
After the Spring Festival, the market has just begun to heat up. How much is a ton of rebar this year This is a concern of many steel traders and construction developers. In the steel market, the price of 6.5 high-speed wire rod is 3730 yuan per ton, the price of 8- 10 wire rod is 37 10 yuan per ton, and the price of 12- 14 secondary rebar is 3780 yuan per ton, 16 secondary rebar.
How much is a ton of third-grade rebar? The price of grade 3 rebar with specification 12- 14 is RMB 3,830 per ton, grade 3 rebar with specification 16 is RMB 3,770 per ton, grade 3 rebar with specification 18-25 is RMB 3,720 per ton and grade 3 rebar with specification 28-32. The price of construction steel such as rebar wire fluctuates frequently, and the price changes every day, which is mainly affected by inventory and steel mill output. In addition, there are rebar futures, iron ore, coking coal and other raw materials that affect rebar prices, and steel mill maintenance will also have an impact on rebar prices.
The above is the specification table, price and classification analysis of rebar. Are you clear? From public facilities such as expressways to the foundations, beams, columns, walls and plates of buildings, rebar is indispensable. When buying rebar, you should pay attention to cutting both ends straight, without cracks, scars and folds on the surface, and there should be no harmful defects in use. Only in this way can we ensure the quality of rebar and ensure the safety of life.
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