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What is the relationship between the price and the hot coil steel prices?
- Effect of hot rolled coil futures price factors are as follows: 1, the steel market supply and demand; 2, lower cost constraint price high or low; 3, the domestic market supply of funds decided to steel price level; the effect of 4, the domestic market competition on the market; 5, the market is expected to boost the role of price change up effect; 6, financial markets and commodity markets on steel prices.s
How to calculate the theoretical elongation of finishing thread steel?
- Rebar is a kind of special bar with discontinuous external thread. The steel bar can be connected or anchored at any section with a connector or anchor with internal thread.s
The difference between wire and thread steel, wire and thread steel difference knowledge
- The surface of the ribbed steel is ribbed, the ordinary hot-rolled bar is HRB, and the fine grained hot rolled steel bar is HRBF. The main use of thread steel: widely used in housing, bridges, roads and other civil engineering construction. Rebar main origin: steel manufacturers in China are mainly distributed in the north and northeast, North China, Tang Gang, such as Shougang steel, bearing steel, such as the northeast northwest Taiwan, Fushun Steel, these two regions accounted for more than 50% of the total output of thread steel.s
Why is round bar more expensive than thread steel?
- Round steel has a wide range of applications, many brands and different uses. Such as machining, shipbuilding and other user processing requirements are also different. Such as alloy round steel, Q345B, high carbon steel, 45#, 35#, general round Q235B, mainly material, ingredients, etc..s
4E DG 164 is a steel grade 3 steel, DG steel, E is what mean
- 4 means HRB400, that is, hardness.E stands for seismic reinforcement.DG is da-gang.16 is the diameter 16mm.s
What is the difference between the II and III grades of threaded steel?
- Compared with traditional II grade steel, the characteristics are as follows:1, high corrosion resistance, can be a large number of security reserves.2. In the chemical composition, because of the low carbon equivalent of the new third grade steel, the welding performance is good.3, high strength ratio, meet the seismic performance requirements. Particularly suitable for high-rise buildings and high seismic performance requirements of the project.4, cold bending performance is good, can be repeatedly bent, more in line with and meet the construction requirements of the construction.5, because of the high strength, can reduce the use of steel, effectively solve the problem of reinforcing steel bars too close, easy to concrete pouring. At the same time, it also reduces the cost of steel transportation and on-site processing.s
Laiwu steel thread steel trademark color blue and red Qu Qu
- In the purchase of rebar, first of all, from the surface quality, the surface of normal steel without cracks, scarring and folding. The surface shall have a bump, but shall not exceed the height of the cross rib, and shall also have a quality grade mark on the surface of the steel bar. Inferior thread steel due to rolling with adobe, its surface quality is poor, often with burrs, burrs, cracks, scarring, some distortions obvious, end of irregular, and even cracks. At the same time, some small mill due to heating temperature and rolling speed is not enough, the surface color is red, uneven color. Second, from the appearance of size, you can use vernier caliper to measure whether the actual size is consistent with the marked size (general thread steel rolled with specifications), if there is a difference in the standard deviation (such as? 16 the standard diameter of the thread steel is 15.4 + 0.4mm, while the quality of the false thread steel is mostly about 13mm. Third, regular steel at the factory, mostly large bundles of packaging, bundles of steel are linked with the physical corresponding metal signs, indicating the factory name, steel number, batch number, specifications and inspection code. But shoddy steel due to poor production conditions, no large hoisting equipment, mostly small (about ten strapping) package or in bulk, no metal signs, no guarantee of quality.s
What is the difference between rebar and round steel?
- In the use of threaded steel, there is a certain mechanical strength, bending deformation properties and welding process performance.s
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