stainless steel flanges

    Italy's Steel Exports To Non-eu Countries Decreased By 15.7% In The First Three Quarters On November 27, the data released by Federacciai, the Italian Steel Manufacturers Association, showed that in the first nine months of this year, Italy’s steel exports to non-EU countries totaled 2.73 million tons, a year-on-year decrease of 15.7%. In terms of exports, the decline in the first nine months was lower than that in the first eight months, reflecting the improvement in exports in September. Especially during this period, imports of long steel products from non-EU countries decreased by 27.9% year-on-year, wire rod imports decreased by 17.8% year-on-year to 139,000 tons, and imports of steel bars decreased by 33.3% year-on-year to 106,000 tons. Italy imported 6.078 million tons of steel from non-EU countries, a 32% decrease from the same period last year; Posted by KAYSUNS,  stainless steel pipe and fittings  supplier.

  Unlike the corrosion of duplex steel pipes immersed in a liquid solution, atmospheric corrosion refers to the corrosion of duplex stainless steel pipes exposed to the air. Atmospheric corrosion summarizes a wide range of conditions, so the classification of atmospheric corrosion is diverse. Some are classified according to geography and the air containing trace elements (industrial, marine and rural); some are classified by climate (tropical, humid tropical, temperate, etc.); and some are classified according to the attachment state of water vapor on the metal surface. From the perspective of corrosion conditions, the main components of the atmosphere are water and oxygen, and the water vapor in the atmosphere is the main factor that determines the corrosion rate and history of the atmospheric duplex stainless steel pipe. Therefore, atmospheric corrosion can be divided into three types: "dry", "moist" and "wet" according to the degree of hu...

Continuous casting process, also known as billet casting, is the process of solidifying molten metal into "semi-finished" billets, blooms or slabs, and then rolling them in a finishing mill. From wiki. There are two methods for casting duplex stainless steel: die casting and continuous casting. Before the 1960s, most of the duplex steels were die cast. The large-scale popularization of continuous casting technology began after the 1960s, especially after the 1970s. By 1985, the global dual-phase steel continuous casting ratio had reached more than 70%. At present, the industrial developed countries basically replace die casting with continuous casting. The use of continuous casting not only improves the yield of molten steel, thereby increases the overall yield rate, and significantly improves production efficiency. Duplex stainless steel continuous casting is generally matched with a refining furnace, and the chemical composition and temperature of the molte...

      2707HD duplex steel is a super duplex stainless steel, and its corresponding UNS grade is S32707 stainless steel. Special super duplex stainless steel is designed to solve the lack of local corrosion resistance and strength of super duplex stainless steel heat-resistant chloride. It came out after 2000. The PRE value of S32707 stainless steel can be as high as 49. It is high in nitrogen, molybdenum, chromium and duplex. The structure makes the yield strength and tensile strength of the steel pipe up to 800MPa and 1000MPa, respectively, and the plasticity and toughness are also maintained at a relatively high level required for engineering applications. Heat exchanger The advent of 2707HD duplex steel has greatly broadened the application range of duplex stainless steel and improved its competitiveness with high-nickel materials such as super austenitic stainless steel and high-nickel corrosion-resistant alloys in engineering applications. The structure of 2707HD dup...

      Selection Of Consumables When Welding Duplex Stainless Steel And Other Steels When two different stainless steels are welded, usually the higher grade stainless steels should be used as the matching welding consumables. For example, when welding  2205 duplex stainless steel pipe  and 2507 duplex stainless steel, 25-10-4 material should be used. Duplex stainless steel and austenitic stainless steel are the most commonly used ultra-low carbon austenitic stainless steel rod with Mo content between the two, such as AWS E309LMo rod and ER309LMo wire. When welding duplex stainless steel and low carbon steel, E309L welding rod and E309L welding wire can also be used. Of course, AWS E309LMo ER309LMo can also be used, but because low carbon steel and low alloy steel do not contain Mo, it is not necessary Containing Mo welding consumables. When welding duplex stainless steel and low-carbon steel or and low-alloy steel, nickel-based alloy rods can also be used, but t...

     Statistics from the Southeast Asian Iron and Steel Institute (SEAISI) show that of the 79.9 million tons of major steel production in Southeast Asia capacity planned to be put into production in Southeast Asia in the next ten years, 59.4 million tons will come from China-led projects. According to SEASI's data, steel production in the Association of Southeast Asian Nations (ASEAN) countries reached 45.3 million tons in 2019, an increase of 5.70% year-on-year. Quick market research on each proposed project and its progress. Indonesia: 19.50 million tons Indonesia's giant steel manufacturer PT Krakatau plans to add another 4 million tons of production capacity and increase its total production capacity to 10 million tons by 2025. Philippines: 18 million tons SEAISI said that in the next ten years, the largest planned production capacity in Southeast Asian countries will come from the Philippines, which will increase the supply of 18 million tons per year. China's Panhu...

   With the long-term use of stainless steel   heat exchanger tubings , some water scale will inevitably occured, Why does scale form? I sorted it out and found that there are these reasons. Crystallization scale The inorganic salt dissolved in the fluid crystallizes on the surface of the heat exchanger tubing to form a deposit. Its principle is the same as that of scale in real life. It will precipitate out when it is too thick or cooled. Chemical reaction scale The fouling produced by the chemical reaction on the heat transfer surface of the heat exchanger tube. Generally speaking, the stainless steel heat exchanger tubing does not participate in the reaction, but it becomes a kind of catalyst for the chemical reaction to a certain extent. Corrosion scale Some corrosive fluids or fluids containing corrosive impurities corrode the surface of the passing heat exchanger tubings and produce scale. I believe you have seen many phenomena such as crystallization, chemical reac...

      S32550  stainless steel pipe  can be welded by GTAW, SMAW and GMAW methods, and can also be welded with other  duplex stainless steel pipes  or dissimilar steels, such as 316, carbon steel, etc. The welding process is similar to that of austenitic stainless steel, but in order to improve the weld metal for corrosion resistance, generally larger heat input is used, and heat treatment is usually not required after welding. When using the SMAW method for welding, it is necessary to use a core with a higher nickel content (Ni about 70%) than the base metal to increase the amount of austenite in the weld and make the weld metal have the same plasticity as the base metal. S32550 stainless steel pipe can be sheared, stamped, molded, etc. Due to the high strength of the steel, the deformation begins to require 2 to 3 times the external force to be deformed than the austenitic stainless steel. If heated to 200°C, the yield strength of steel can be reduced...