Maybe some people don’t know that 304 stainless steel pipes can still maintain the stability of all aspects of their performance in high-temperature environments. Therefore, they are widely used in high-temperature pipeline transportation systems in petrochemical, electric power, medicine, food and other fields. Why does it have high temperature resistance? What about performance? Today the editor will reveal the secret to you: 304 stainless steel pipe is a high temperature resistant and corrosion resistant material. Its main components are chromium, nickel and low content of carbon. The specific heat resistance temperature will also vary according to different standards. Generally speaking, the critical temperature of 304 stainless steel pipes is 850 degrees Celsius, but it is recommended not to exceed 500 degrees Celsius when used to ensure the stability of its physical and chemical properties. In high-temperature environments, the stable performance of 304 stainless steel pipes is mainly due to the fact that the chromium content accounts for more than 18%. When encountering oxidizing media, it can combine with oxygen to form a chromium trioxide oxide film, thus preventing the internal metal from contacting the outside world, thereby preventing the internal metal from contacting the outside world. To achieve the purpose...
1. High thermal conductivity: Compared with austenitic stainless steel, 430 stainless steel pipe has higher thermal conductivity. This means they can dissipate heat more efficiently, and maintaining the heat required for welding can be challenging. 2. Rapid cooling rate: 430 stainless steel pipes tend to experience rapid cooling rates during the welding process, especially in thicker sections. This rapid cooling can lead to the formation of brittle phases, such as martensite, in the heat-affected zone, increasing the risk of cracking. 3. Sensitivity to hydrogen embrittlement: Ferritic stainless steel is more susceptible to hydrogen embrittlement during the welding process. The welding process introduces hydrogen into the material, which if not managed properly can lead to the formation of hydrogen-induced cracks. 4. Susceptibility to hot cracking: 430 ferritic stainless steel is prone to hot cracking, especially in the presence of impurities such as sulfur and phosphorus. The welding process can introduce these impurities, and proper welding techniques such as preheating and controlling interpass temperature are critical to minimizing the risk of hot cracking. 5. Limited ductility at low temperatures: 430 stainless steel exhibits reduced ductility at lower temperatures, and the welding process involves localized heating and cooling. This temperature fluctuation can cause...
Regarding stainless steel weld seam treatment methods, Senyuan provides a variety of solutions. CA-Q04 produced by Senyuan can process stainless steel weld seams very well and is suitable for weld seam treatment of 200, 300, and 400 series stainless steel, including austenitic. Stainless steel, ferritic stainless steel, martensitic stainless steel, and duplex stainless steel can all effectively and quickly remove welds. Weld treatment method of ferritic stainless steel (1) Ferritic stainless steel does not undergo phase transformation during heating and cooling, and does not undergo quenching hardening. (2) The parts heated to above 950°C (welds and heat-affected zones) have a serious tendency to grow grains, and post-weld heat treatment cannot be used to refine coarse grains, which reduces joint toughness and increases the tendency of cold cracking. (3) If the weld and heat-affected zone stay in the temperature range of 400~600℃, “475℃ brittleness” will easily occur. Staying in the temperature range of 650~850℃ will easily cause 8-phase precipitation and embrittlement. (4) When welding, attention should be paid to the heating and cooling rates in the above two temperature ranges. Short-term heating above 600℃ followed by air cooling can eliminate 475℃ embrittlement; heating to 930~980℃ and rapid cooling can eliminate phase...
The differences and uses of stainless steel 2D surfaces and 2B surfaces can be briefly summarized from the following two blocks: 1. Introduction to the differences between stainless steel 2D surface and 2B surface: Many customers still don’t quite understand the difference between the 2D surface and the 2B surface of stainless steel. Here is a brief introduction: NO.1 Silvery white, matte. A rough, matte surface that is hot-rolled to a specified thickness and then annealed and descaled. Uses that do not require surface gloss. NO. Stainless steel 2D surface, silver-white cold rolling, heat treatment and pickling, sometimes a final light rolling on the rough side roller, a matte surface processing 2D product used for purposes that do not have strict surface requirements, general materials, Deep drawing materials. NO. The surface gloss of stainless steel 2B is stronger than that of stainless steel 2D. After surface treatment of stainless steel 2D, it is subjected to a final light cold rolling with a polishing roller to obtain appropriate gloss. This is the most commonly used surface treatment and can also be used as the first step in polishing. The 2D surface of general stainless steel is also one of the common...
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