Knowledge of steel pipe and square steel specifications, models and weight tables

Hot-rolled sheets, that is, hot-rolled steel-rolled steel sheets or steel strips, commonly known as hot plates, are usually also written as stencils, such as hot-rolled sheets, but all refer to the same hot-rolled sheet. Refers to a steel plate having a width greater than or equal to 600 mm, a thickness of 0.35-200 mm, and a steel strip having a thickness of 1.2-25 mm. The cold rolled sheet is obtained by rolling a hot rolled coil as a raw material at a recrystallization temperature at room temperature.

Although the demand for spiral steel pipes has been shrinking in the process of slowing domestic economic growth, since the beginning of 2019, the four major mines have continued to increase production with the support of lower production costs, and the supply continues to increase. In the first quarter of 2019, the output of the four major mines increased significantly year-on-year. In the second quarter, except for FMG, the output of the other three major mines continued to grow year-on-year. According to the seasonal law, the annual high output will appear in the third quarter, and the medium-term ore supply is likely to maintain a growing trend.

Users who have purchased spiral steel pipes know that there is a certain gap between the prices of each spiral steel pipe manufacturer. Then, according to which factors are the prices of spiral steel pipes determined? The following are some of the factors summarized by the spiral steel pipe manufacturers, you can find out, I hope to help everyone:

Los tubos de acero sin costura se perforan a partir de acero redondo completo, y los tubos de acero sin soldaduras en la superficie se denominan tubos de acero sin costura

Tubo de acero sin costura están perforados de acero redondo entero, y los tubos de acero sin soldaduras en la superficie se denominan tubos de acero sin costura.

　　The inner diameter of the stainless steel cylinder tube indicates the output force of the cylinder. The piston should slide smoothly in the cylinder, and the inner surface roughness of the cylinder should reach ra0.8um. The inner surface of the steel pipe column should be plated with hard chrome to reduce friction and wear and prevent corrosion. The cylinder material is made of high-strength aluminum alloy and brass, except for high-carbon steel pipes. This small cylinder is made of stainless steel. In corrosive environments, cylinders using magnetic switches or cylinders should be made of stainless steel, aluminum or brass.

　　Since the surface of the stainless steel tube will form a thin protective film, although the protective film is about 3×10-6 mm, it is very tough. Even if it is destroyed, as long as there is oxygen next to it, it can be regenerated immediately to prevent rust. As long as you know the characteristics of stainless steel and use it correctly.

Prueba de conocimientos de galvanización

Hyundai Steel Corporation announced on July 9 that the company's H-beam prices will increase from July 18.

　　There are many types of steel pipes and different uses, so their technical requirements are different and production methods are different.

Beneficios de usar tubería de acero inoxidable de pared delgada

In July, Korean cold-rolled flat product manufacturers began to increase prices. Among them, South Korea's Eastern Steel has identified new price tags, and other companies such as South Korea's Dongkuk Steel and South Korea's Shiya Group also participated in the price increase.

Since June 21, the price of hot rolled coil in the Midwest has remained above US$1,000/ton (up from US$6/ton to US$1009/ton on July 10). This is the price of US steel, represented by hot rolled coil, has once again exceeded $1,000/ton since October 17, 2008.

　　Thick-walled seamless steel pipes are subject to high weather factors. The heavy rains brought by many days have brought about the continuous increase in the price of thick-walled seamless steel pipe industry. Today, according to statistical prices, the prices are relatively stable, and the profits of enterprises are relatively stable. However, there are many companies that have no profit to earn, and are in a wait-and-see state!

Conocimiento del ámbito de aplicación de los tubos de acero sin costura en diferentes campos

La tubería de acero inoxidable es un acero redondo largo y hueco, que se usa ampliamente en petróleo, química, medicina, alimentos, industria ligera, maquinaria e instrumentación y otras tuberías industriales y piezas estructurales mecánicas. La tubería de acero inoxidable es un tipo de acero de sección transversal económica . Es un producto importante en la industria del acero. Por lo general, representa alrededor del 8% -16% del acero total. Tiene una amplia gama de aplicaciones en la economía nacional y es en sí mismo un ahorro La sección económica del acero metálico es un parte importante del acero de alta eficiencia, especialmente en las industrias de perforación, fundición y transporte de petróleo.

　The price difference of thick-walled steel pipes is very large, and there are different prices in different regions. At the same time, there is a relative balance between the prices of related alternative products and too large or too small, which will cause the market to adjust itself. According to the latest official statistics on July 1, the price difference of thick-walled steel pipes per ton is about 3,000 yuan.

Especificación de tamaño de tubería de acero soldada eléctricamente de gran diámetro