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Published 26 April 2024
Cutting of high-performance austenitic stainless steels – waterjet, plasma and laser cutting
Water jet cutting Water jet cutting uses a nozzle to produce a high-pressure water jet carrying fine abrasive particles for cutting. This method is very effective for cutting both metallic and non-metallic materials. The process uses high-capacity pumps and has very high water and electricity requirements. This method can cut thick stainless steel (>100mm) without generating a heat-affected zone (HAZ) or changing the metallurgical structure of the workpiece. Although the quality of water jet incision is good, when the cutting section is thick, the bevel angle of the section will be larger. It is not economical to cut thin steel plates using this method, but by stacking multiple thin steel plates, multiple workpieces can be cut at one time. Plasma cutting Plasma cutting is the most commonly used method for cutting all grades of austenitic stainless steel medium-thick plates with a thickness above 25mm. The design of the plasma gun significantly improves accuracy and cut quality, making it an ideal process for cutting straight lines or special shapes. In some cases, plasma cut cuts are of such good quality that they can be used directly without further processing or as welded joints. Since plasma cutting does involve high temperatures and...
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Published 19 April 2024
Stainless steel and mild steel price higher
In the raw material market, the average ex-factory price of ferronickel increased by 5 yuan/nickel, the average ex-factory price of ferrochrome remained unchanged, and the price of electrolytic nickel in Jinchuan fell by 500 yuan/ton. Fed Chairman Jerome Powell said there was a lack of further progress on inflation. While there is progress in inflation, it is not happening fast enough and it may take longer to have confidence in inflation. Statements on inflation further undermined market bets on the Fed cutting interest rates. Strong inflation in the first quarter has created new uncertainty about whether the Federal Reserve can lower interest rates this year without signs of an economic slowdown. The sharp shift in the Fed’s outlook came after a third straight month of stronger-than-expected inflation data, which appeared to dash hopes that the central bank might preemptively cut interest rates. If inflation continues to rise above 2%, the Fed may keep interest rates at current highs for longer. According to the National Bureau of Statistics, my country’s economy performed smoothly in the first quarter and achieved a good start. The overall production situation is good, and the industry has achieved rapid growth. Consumer investment continues to recover, and...
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Published 12 April 2024
Do steel pipes need to be GOST-R certified when exported to Russia?
Introduction to GOST-R Certificate of Conformity: “GOST” is the abbreviation of “State Standard” in Russian. Before February 15, 2013, whether products produced in Russia or products exported to Russia from other countries, according to legal regulations, they must pass GOST certification, which is national standard certification. After the promulgation of the Russian Federation Law “Products and Certification Services Law” in 1995, Russia began to implement compulsory product certification GOST-R. Russian GOST-R certification includes two major certification systems: compulsory certification and voluntary certification. The GOST-R certificate is issued by the Federal Service for Technical Regulation and Metrology (Rosstandart or Gosstandart). Therefore, the GOST-R certificate of conformity is also commonly called the Russian Gosstandart certificate of conformity or the PCT certificate of conformity. Logo: PCT Russian Gost certification is quick to issue and the price is cheap. You only need to provide product information, and professional Russian-speaking engineers will provide you with a certification plan and quotation for free. If you are satisfied with the plan, you will sign a contract. If you are not satisfied, there will be no charge. Gosstandart defines a list of products that cannot be produced or sold in Russia without a mandatory PCT certificate of conformity...
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Published 08 April 2024
What material is S355 made of? Is it equivalent to the GB standard material?
S355JR – → Q345B S355J0 – → Q345C S355J2 – → Q345D S355K2 – → Q345E S355MC – → QStE340TM or QStE380TM or Wusteel : WL510 S355J2G3W – → Q345GNHL S355NL is a normalized steel (fine-grained steel) in the EN10025-3:2004 standard. Its yield strength and tensile strength correspond to my country’s Q345 low alloy steel. NL is required to absorb impact in a low temperature environment of minus 50 degrees. Work test·and the impact value is not less than 27J. S355 is a European standard low alloy high strength plate The steel grade must consist of the following parts: —This standard number (EN10025-2); —Steel name or steel number: The steel name consists of the following parts: —Symbol letter S (structural steel) or E (engineering steel); —Description of the minimum yield strength in MPa for thicknesses ≤16 mm; —When feasible, mark the name of the mass component of the impact energy; — where feasible, mark letters for special purposes; – If the product is delivered in “+N or +AR” status, it must be marked “+N or +AR”. quality level EN10025-2 quality grades are divided into S355JR, S355J0, S355J2, S355K2, EN10025-23 quality grades are divided into S355N S355NL. chemical composition Take...
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