01 The purpose of the stainless steel bright annealing process Bright annealing furnace is mainly used for heat treatment of finished stainless steel products under protective atmosphere. When the performance requirements are different, the requirements for the metallographic structure after bright annealing are different, and the bright heat treatment process is also different. The typical heat treatment process for 300 series austenitic stainless steel is solution treatment. During the heating process, the carbides are dissolved into the austenite, heated to 1050~1150°C, and kept for a short period of time to allow all the carbides to dissolve in the austenite, and then rapidly cooled to below 350°C to obtain a supersaturated solid solution that is uniform. Unidirectional austenite structure. The key to this heat treatment process is rapid cooling, which requires the cooling rate to reach 55°C/s and quickly pass through the re-precipitation temperature zone (550~850°C) after carbide solid solution. The holding time should be as short as possible, otherwise the grains will become coarse and affect the surface finish. The heating temperature of 400 series ferritic stainless steel is relatively low (around 900°C), and slow cooling is often used to obtain an annealed and softened structure. Martensitic stainless steel is...
After years of research and development, stainless steel has many classifications. Among them, according to the different matrix structures of stainless steel materials, they are mainly divided into: 1. Ferritic stainless steel Ferritic stainless steel is the most common type of stainless steel material. It is a stainless steel with a mainly ferrite structure under use. The chromium content of this stainless steel is between 11% and 30%. In addition, it also contains small amounts of molybdenum, titanium, niobium and other elements. In addition to its good corrosion resistance, ferritic stainless steel is characterized by good oxidation resistance and excellent stress resistance. It also has good thermal conductivity and a very small expansion coefficient. However, ferritic stainless steel has poor plasticity, so this stainless steel material is mainly used to make corrosion-resistant parts. 2. Austenitic stainless steel Austenitic stainless steel is a stainless steel material with a stable austenitic structure inside. In addition to containing 18% chromium and about 8% nickel, it also contains a small amount of molybdenum, titanium, nitrogen and other elements. This kind of stainless steel material is a product with good comprehensive performance and can withstand corrosion from various media. Moreover, austenitic stainless steel has relatively...
The difference between 304 stainless steel pipe and 316 stainless steel pipe In daily life, more and more stainless steel pipe products can be seen everywhere, and the stainless steel pipe materials used are also different. Some are made of 304 material, and some are made of 316 material. People often ask which one is more expensive, 304 stainless steel pipe or 316 stainless steel pipe. In fact, the two are quite similar. It is more expensive than 316. Today I will share with you the difference between the two. The density of 304 stainless steel is 7.93g/㎝3, and the density of 316 stainless steel is 8.03g/㎝3. In essence, there is no obvious difference between the two. They are both one of many stainless steels, with the characteristics of acid resistance, alkali resistance, easy processing, and high toughness. But if you divide it more carefully, you can see the difference between the two materials. First of all, in terms of application, 304 stainless steel pipe has a wide range of uses and has good corrosion resistance. It can be used for anti-theft windows, stair handrails, guardrails, anti-theft doors, car exhaust pipes, medical equipment, etc. 316 adds Ni, Cr, and Mo...
SHAANXI JINYOU METAL TECHNOLOGY CO., LTD is an exclusive company engaged in the wholesale and distribution of stainless steel plates, acting as an agent for stainless steel series products of many manufacturers such as TISCO, ZPSS, Baosteel and imports. Main materials: 201, 202, 301, 304, 321, 316, 316L, 309S, 310S, etc. Our company’s products have many varieties, complete specifications and excellent prices. We welcome new and old customers and friends from all walks of life to discuss cooperation. #STAINLESSSTEELSHEEET #STAINLESSSTEELPLATE #SSPLATE #2BSHEET #BASHEET #SHANKHESHWARSTEEL #stainlesssteelsheet #SSSHEET #SSCOILS #SSPLATES #No1SHEET #HOTSHEET #COLDSHEET
Home WhatsApp Mail Inquiry
