Under the influence of the above two factors

At the beginning of the steel pile tip week, black commodity futures surged significantly, and steel companies in Jiangsu, Zhejiang and other regions continuously raised their ex factory prices. The demand for stocking was stimulated, and market transactions were active, causing prices to rise sharply. After Thursday, demand followed suit and slowed down, causing prices to fall back from high levels. At present, the inventory of rebar in the Hangzhou market is 910000 tons, with a decrease of 9000 tons in the weekly to weekly ratio. Due to increased demand uncertainty, it is expected that there will be some fluctuations in the Hangzhou market next week. Guangzhou market: This week, the prices of building materials in the Guangzhou market first rose and then fell. Currently, the mainstream quotation for rebar Shaogang with a specification of Ø 18-25mm HRB400E is 3960 yuan/ton, while the quotation for HRB400E with a specification of Ø 18-25mm from Guangzhou Iron and Steel, Cold Steel, Yufeng, Yuegang, and Xianggang is 3920-3960 yuan/ton; The mainstream price of Shaogang HPB300 Ø 6-10mm high wire is 4050-4110 yuan/ton; Guangzhou Iron and Steel, Zhuhai Guangdong Iron and Steel, and Hunan Iron and Steel have the same specifications of high wire with a selling price of 3950-4040 yuan/ton. Xianggang and Pinggang offer a price of 4000-4040 yuan/ton for the Ø 8-10mmHRB400 spiral screw. According to market feedback, stimulated by the weekend production restrictions in Tangshan, prices in the national market generally rose in the first half of the week. Leading steel mills in South China continued to raise their factory prices, while prices in the Guangzhou market surged; In the second half of the week, the rainy weather weakened downstream demand and some high priced resources became loose. In terms of inventory, the social inventory in Guangzhou continued to decline this week. As of May 20th, the stock of building materials in the sample warehouse was 1.6404 million tons, a decrease of 120200 tons from last week (176.06 tons) and an increase of 314200 tons from the same period last year (1.3262 million tons). Among them, the inventory of threaded steel was 1.1663 million tons, a decrease of 72200 tons from last week (1.2385 million tons), and the inventory of wire rod and coil screw was 474100 tons, a decrease of 48000 tons from last week (522100 tons). Overall, the current market demand is slowing down, and the rate of decline in social inventory is also slowing down. Although the willingness of local steel mills to raise prices has not weakened, it is difficult to predict whether the shipment volume can support high prices. It is expected that prices in the Guangzhou market may adjust next week. 2、 Cost analysis 1. Price adjustment by steel mills this week. Domestic steel mills have mainly increased their ex factory prices this week. As the weekend approaches, the acceptance of high-level resources by end-users is low, and some steel mills have slightly lowered their ex factory prices.

Steel pipe insulation board house with doors and windows construction project contracting Guangzhou steel manufacturer contact person: Ms. Peng. Compared with traditional civil construction methods, steel structure buildings have four excellent functions: "light, fast, good, and economical". In the process of repeated construction, China has created two worlds: while consuming the world's largest amount of cement and steel, it also produces the world's largest amount of construction waste - up to 400 million tons per year. The amount of construction waste from mobile houses in Wuhan has accounted for 30% to 40% of the total waste. The mining of sand and gravel in some areas has severely damaged riverbeds and vegetation. The average lifespan of buildings in Europe and America is over 80 years, while in comparison, the average lifespan of buildings in China is only 30 years, which is less than 60% of the national standard service life. The ratio of bulk density to strength of steel is smaller than that of concrete and wood. Under equal conditions, buildings constructed with steel structures have the lightest overall weight. Steel structure mobile houses are easy to manufacture mechanically, have a high degree of flexibility, are easy to install, and have a short construction period. They are a type of industrialized structure in engineering structures. Steel structure buildings have minimal environmental damage, good seismic performance, and are suitable for different weather conditions and atmospheric environments. The use of steel structures can also save foundation costs, save water, facilitate cost control, and can be reused to reduce construction waste. In addition, construction waste also severs the historical context of the city, weakens the inheritance of urban culture, and destroys the charm of the city. More importantly, the recyclability rate of building materials for reinforced concrete structures and masonry structures is extremely low, and the environmental pollution caused by the construction waste generated after reaching their lifecycle, as well as the adverse effects on their descendants, have attracted widespread attention and concern from experts at home and abroad. Construction waste is piled up and buried near cities, trapped in a "garbage siege" situation, not only occupying land, but also containing various harmful chemicals, severely eroding the surface and polluting groundwater sources, posing a great threat to the human living environment..

Steel structure accessories are suitable for building structures that are resistant to atmospheric corrosion. The products are usually used in the delivery state and can be used to make bolted connections, riveting, and welded structural components. However, when used as welding structural materials, the plate thickness should not exceed 16mm. Weathering steel for welding structures (GB/T4172-2000) has good welding performance and a thickness of up to 100mm. Its grades include Q235NH, Q295NH, Q355NH, Q460NH. Among them, "NH" represents "weather resistant", "L" represents high weather resistant steel containing chromium and nickel, with quality grades of C, D, and E. Thickness directional performance steel plate (GB5313-1985). What is the practical scope? In some important load-bearing components, steel plates are not only required to have certain mechanical properties along the length and width directions, but also to have good resistance to layered tearing in the thickness direction;? Practical for killed steel plates with a thickness of 15-150mm and a yield strength not exceeding 500MPa. Steel plates with thickness less than 15mm and greater than 150mm or yield strength greater than 500MPa shall be negotiated separately when ordering;? The anti laminar tearing performance of steel plates is evaluated by the cross-sectional shrinkage rate of the thickness direction tensile test. 2）. Steel grade and technical requirements 3) The scope and grade of steel are generally applicable to the production of steel plates for high-rise buildings with a thickness of 6-100mm, divided into 2 strength levels and 4 grades. The grade is composed of the Pinyin letter (Q) representing the yield point, the numerical value of the yield point, the Chinese Pinyin letter (GJ) for high-rise buildings, and the symbols for quality grades (C, D, E). The suffix letter "Z" is added to the thickness direction performance steel plate. The four grades are Q235GJ, Q235GJZ, Q345GJ, and Q345GJZ. Steel plates for bridge structures (GB/T714-2000) There are three grades of steel for bridge structures: Q235q, Q345q, Q370q, Q420q, with quality grades of C, D, and E. What are the classification codes for hot-rolled H-beams and sectional T-beams? Wide flange H-beam - HW (W stands for Wide in English)? H-shaped steel with a middle flange - HM (where M is the Middle prefix)? Narrow flange H-beam - HN (N stands for Narrow in English)? Wide winged T-shaped steel - TW (W stands for Wide in English)? T-section steel with split middle flange - TM (where M is the Middle prefix)? Narrow flange section T-section steel - TN (N is Narrow in English) hot-rolled H-beam and partial T-section steel specification marking method Height H x Width B x Web thickness t1 x Wing thickness t2, for example: HW100 x 100 x 6 x 8; TN125 × 60 × 6 × 8..

2) The variety and technical performance of fire-resistant coatings for steel structures should meet the design requirements and be tested by qualified testing institutions in accordance with the relevant national standards. (11) Other 1) The variety, specifications, and performance of rubber pads for steel structures should comply with the current national product standards and design requirements. 2) Other special materials involved in steel structure engineering should comply with current national product standards and design requirements in terms of variety, specifications, performance, etc. 02 Verification Method (1) According to the unit engineering structure design, change design documents, and raw material ingredient summary table, verify whether the types and specifications of raw materials in the factory certificate (inspection certificate) and test report of raw materials and products are consistent, whether samples are taken in batches, and whether the sum of the batches represented by the samples is consistent with the actual usage. (2) Verify whether the test (re inspection) results of raw materials or finished products meet the requirements of standards, specifications, and regulations. (3) Verify whether the project name in the certificate of conformity and test (re inspection) report is consistent with the actual project, whether all technical data comply with standard regulations, whether the test methods and calculation conclusions are correct, whether the test items are complete, and whether they comply with the principle of testing before use and acceptance before concealment. (4) Verify whether there are calculation sheets and design visas for the substitution of raw materials or finished products, and whether the calculation results comply with current standards and specifications. 03 Verification principle: If any of the following situations occur, this project will be determined as "not meeting the requirements". (1) The incoming raw materials or finished products do not have factory certificates or test reports. (2) The variety, specifications, and design documents of the incoming raw materials or finished products are inconsistent, and there is no substitute design visa. (3) The sampling quantity of incoming raw materials or finished products is insufficient, or the performance test items are incomplete, or a certain performance indicator is unqualified and not retested according to regulations, and has not been identified and processed.

Alien components have been the mainstay until now, and various types of louver designs have been constantly influencing people of all kinds.

From the perspective of construction steel market demand, during the Spring Festival, construction of construction projects was basically stopped. Some projects were closed in advance due to the rainy and snowy weather before the festival and the Spring Festival was later than previous years, so the project was required to start as soon as possible after the festival. According to traditional practices, the full construction of projects after the festival was generally resumed after Yuanxiao (Filled round balls made of glutinous rice-flour for Lantern Festival), and migrant workers returned to the city. However, this year's Yuanxiao (Filled round balls made of glutinous rice-flour for Lantern Festival) Festival was in the first ten days of March. Therefore, the demand for construction steel market was still difficult to release significantly in late February and early March, and the stagnation of demand for steel in construction projects would take about one month to one and a half months. So, in the middle and late March, the demand for building materials market would gradually release. This year's impact on the demand for construction steel market is different from previous years. In the early stage of today's Spring Festival, most areas in China experienced heavy snow and blizzards, causing outdoor construction projects to stop construction earlier. Some areas were also affected by haze weather, which slowed down the progress of construction projects due to restrictions. Moreover, due to environmental protection measures, construction projects in the Beijing Tianjin Hebei region have been suspended for a relatively long period of time. Some projects were suspended in October and November last year, which has constrained the release of demand. After the Spring Festival, there is expected to be a "rush to work" in construction projects, accelerating the construction progress, especially in North China where construction projects will quickly enter a construction peak. Therefore, at that time, the demand intensity and quantity of construction steel in North China will be stronger and more intense compared to other regions, with a large demand. There may be an explosive demand growth period, and North China may be the first to start the market, with prices possibly higher than South China. The expected timeline is from late March to early April, as the "rush of construction" injects momentum into the demand for building materials, leading to a rise in steel prices. This is also the reason why steel prices in March were initially low and then high. Special reminder to traders to pay attention to some uncertain factors affecting the steel market situation in March, which are mainly reflected in several aspects: firstly, to pay attention to changes in steel market inventory. Due to the Spring Festival holiday, the accumulation speed and quantity of steel inventory will be much faster than in previous years. At present, the steel inventory in Guangzhou has significantly increased, and the inventory in the Guangzhou market is higher than the same period last year.

However, domestic corporate buildings often inadvertently disrupt these lines, resulting in a dull overall image of the building and unreasonable placement of dull walls and skylights, which is the main reason for the disruption of these lines. As mentioned earlier, domestic design mostly adopts the approach of building design and structural design first. In architectural design, a large number of lighting windows are installed on the walls to consider building lighting. Although this type of skylight meets the needs of lighting, it destroys the line shape of the wall in architecture. In fact, light steel structure buildings can effectively ensure building lighting without damaging the lines of the wall panels by using a large number of roof skylights to reduce the number of windows on the walls. In addition, there are also differences in the shape of the wall panels, which is another important factor affecting the shape of the lines. 3. Architectural color: The use of various colored metal profiled steel plates makes light steel structure buildings appear rich and colorful, especially the bold use of jumping colors and cool tones, which can give people a refreshing feeling that is clearly different from traditional buildings. The expression of color includes two parts, one is the color expression of roofs and wall panels, and the other is the color expression of decorative parts such as edge finishing and flashing. Domestic enterprises often choose white, blue, and red colors, and rarely choose brown, black, or multiple color combinations. This is not only due to the trend of aesthetic consciousness among social groups, but also due to the monotonous color of domestically produced boards, as well as the aesthetic issues of design engineers and buildings, and the subjective and arbitrary issues of property owners.

Under the influence of the above two factors, China's steel exports from January to November 2017 have significantly decreased by more than 30% year-on-year. It is expected that the annual export volume will decrease by 32.5 million tons compared to 2016,? =””normalbackground-color:ffffff，? =In 2018, the expansion of domestic steel production capacity is still limited, and the domestic market supply and demand may continue to maintain a balanced state. Steel prices are expected to remain at a high level, and the pressure on steel exports remains high. The overall export situation may be similar to this year. normalbackground-color:ffffff，? =””normalbackground-color:ffffff，? =The trend of steel prices in 2018 will be "high at the beginning and low at the end". Normal background color: ffffff, what,? =””normalbackground-color:ffffff，? =According to estimates, the overall new and eliminated production capacity of blast furnaces in China in 2018 remained the same, while electric arc furnaces are expected to grow significantly, meaning that the total steel supply will continue to increase next year. At the same time, as the growth rate of fixed assets investment will decline next year, the total demand for steel will decline next year. So, in 2018, the domestic steel supply and demand will develop towards a more relaxed direction. normalbackground-color:ffffff，? =””normalbackground-color:ffffff，? =Steel prices may reach their highest point of the year in April 2018. Before mid March next year, due to production restrictions, steel supply will still be tight and inventory will be difficult to accumulate, so steel prices will remain high overall. After the heating season ends in mid March, the suspended blast furnaces will gradually resume production, but it will take about half a month from ignition to full production, and steel demand has already entered the peak season. So, short-term supply-demand mismatch may lead to steel prices reaching a high point of the year around that point in time. It cannot be ruled out that it will reach 5500-6000. Afterwards, as demand slowly falls, steel prices will gradually decline. normalbackground-color:ffffff，? =””normalbackground-color:ffffff，? =Specifically, the annual trend of steel prices can be roughly divided into five stages: normal background color: ffffff,? =””normalbackground-color:ffffff，? =The stage is from the beginning of the year to mid March, when steel prices continued to rise due to the country's crackdown on medium frequency furnaces and "ground steel", as well as strong downstream demand, normalbackground-color:ffffff，? =””normalbackground-color:ffffff，? =The second stage is from mid March to early April, during which the government intensively introduced real estate regulation policies, leading to a pessimistic outlook on steel demand and a period of consolidation after prices fell, normalbackground-color:ffffff，? =””normalbackground-color:ffffff，? =The third stage is from early April to mid September, during which the macroeconomic performance is good and pessimistic expectations are corrected. At the same time, the supply gap caused by the clearance of medium frequency furnaces and "ground steel" is gradually emerging, and steel prices continue to rise.

Figure 1: Production Cost and Profit Data of Domestic Threaded Steel Enterprises Source: Shanghai Steel Union Steel Division Figure 2: Production Cost Difference between Blast Furnace and Electric Arc Furnace Threaded Steel Source: Shanghai Steel Union Steel Division 2. Steel supply slightly increased, and the pressure on traders to ship increased after the holiday. On February 8, 2018, Mysteel monitored the production situation of 139 building materials steel mills nationwide, and found that the production of threaded steel decreased for four consecutive weeks. The weekly production capacity of its threaded steel is 4.5617 million tons, with an actual weekly output of 2.8921 million tons, an increase of 385800 tons year-on-year in the Gregorian calendar and 386300 tons year-on-year in the lunar calendar. From this, it can be seen that although there are winter/environmental restrictions on production, it is not as expected, and the output of steel mills is higher than the same period last year. Table 1: Production data of threaded steel from 139 construction steel production enterprises nationwide. Data source: Shanghai Steel Union Steel Division. Figure 3: Capacity utilization rate of threaded steel from 139 construction steel production enterprises nationwide. Data source: Shanghai Steel Union Steel Division. With the adjustment of prices and the implementation of winter storage policies by some steel mills, the winter storage sentiment of traders has been stimulated, leading to the continuous shift of inventory from the factory to the market. According to Mysteel's research data, the total inventory of rebar (factory and social) on February 8th was 8.188 million tons, a decrease of 3.8387 million tons year-on-year in the Gregorian calendar and an increase of 184200 tons year-on-year in the lunar calendar. Table 2: Source of rebar inventory data: Shanghai Steel Union Steel Division 3. Export competitiveness is low and tends towards zero. According to customs data, China exported 5.67 million tons of steel in December 2017, an increase of 320000 tons from the previous month and a year-on-year decrease of 27.3%; From January to December, China's cumulative export of steel reached 75.43 million tons, a year-on-year decrease of 30.5%. In December, the export quantity of steel bars in China was 6100 tons, a decrease of 6900 tons month on month and a decrease of 9800 tons year-on-year. The main reason is that the export price of Chinese rebar (FOB) is still significantly higher than the import price of Southeast Asian rebar (CFR) by nearly 100 US dollars per ton. The export of rebar is almost uncompetitive, and it is expected that rebar exports will tend to zero in the short term. Figure 4: China's construction steel export quantity data source: Shanghai Steel Union Steel Business Unit 4. The demand for real estate in the later stage is difficult to be optimistic, and the expectation for infrastructure investment is cautious. In 2017, the national real estate development investment was 1.09799 trillion yuan, a nominal increase of 7.0% over the previous year, with a growth rate 0.5 percentage points lower than that from January to November.

On the other hand, the driving effect of raw materials and futures is reduced, and the prices of raw materials and futures are weakening, which reduces the driving effect on the market and leads to a rapid decline in market enthusiasm. Due to shrinking transactions and a recent rebound in inventory, most construction sites are in a rush to meet the demand for building materials, which directly supports the rise in building material prices. However, with the continuous rise in building material prices, even the tax inclusive price of tertiary large threads in some markets has exceeded 5000 yuan/ton, which has a significant impact on construction sites. So, the demand for building materials on construction sites is gradually decreasing. On the one hand, this is due to the conscious reduction in prices, and on the other hand, as the project progresses, the consumption of building materials begins to decline. In this situation, the shipment volume of steel companies began to decline slightly, while inventory steadily increased. The driving force of raw materials and futures has reduced the volatility of the futures market, with a slight decline in recent days, and even in the short term, there is no ability to continue to move upwards, which will continue to fluctuate. According to monitoring, bulls are continuously reducing their positions, which is bearish on the market and has dampened the enthusiasm of the spot market. The market for raw materials such as ore and coke has also been relatively weak in recent days, and their driving effect on finished products is at a relatively low level. In this situation, the price of finished products is naturally dragged down or suppressed to a certain extent. In the short term, the supply-demand contradiction in the building materials market still exists, but due to the high market price and reduced downstream demand, inventory may continue to increase slightly, which will have a certain negative impact on building materials prices.