The standard martensitic stainless steels are: 410, 414, 416, 416(Se), 420, 431, 440A, 440B and 440C, which are magnetic; the corrosion resistance of these steels comes from "chromium", which ranges from 11.5 to 18%, the higher the chromium content, the higher the carbon content is required to ensure the formation of martensite during the heat treatment. The above three types of 440 stainless steel are rarely considered for applications that require welding, and the 440 type composition is filled Metal is not easy to obtain.The improvement of standard martensitic steel contains additional elements such as nickel, molybdenum, vanadium, etc., which are mainly used to increase the restricted allowable working temperature of standard steel to higher than 1100K. When these elements are added, the carbon content also increases. As the carbon content increases, the problem of avoiding cracks in the hardened heat-affected zone of the weld becomes more serious.
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About 904L stainless steel plate:There are three types of 904L stainless steel plates: hot-rolled stainless steel plates, cold-rolled stainless steel plates, and finish-rolled stainless steel plates. 904L super austenitic stainless steel is a low-carbon, high-nickel, molybdenum austenitic stainless and acid-resistant steel. It is a proprietary material imported from France H·S. It has good activation-passivation transformation ability, excellent corrosion resistance, good corrosion resistance in non-oxidizing acids such as sulfuric acid, acetic acid, formic acid, and phosphoric acid, and good corrosion resistance in neutral chloride-containing media It has good pitting corrosion resistance and good resistance to crevice corrosion and stress corrosion. It is suitable for sulfuric acid of various concentrations below 70°C, and has good corrosion resistance in acetic acid at any concentration and at any temperature and mixed acid of formic acid and acetic acid under normal pressure.Super austenitic stainless steel 904L (00Cr20Ni25Mo4.5Cu, UNS: N08904, EN: 1.4539) is a highly alloyed austenitic stainless steel with very low carbon content. It has good corrosion resistance in dilute sulfuric acid and is specially designed for Designed for harsh environments with corrosive conditions. It has a high chromium content and sufficient nickel content. The addition of copper makes it highly resistant to acid, especially to chloride crevice corrosion and stress corrosion cracking. It is not easy to appear corrosion spots and cracks, and is resistant to spots. Slightly better corrosion ability than other steel grades, has good workability and weldability, and can be used for pressure vessels 1) The cold-rolled product has good gloss and beautiful appearance; 2) Due to the addition of Mo, it has excellent corrosion resistance, especially pitting corrosion resistance; 3) Excellent high temperature strength. 4) Excellent work hardening (weak magnetic properties after processing) 5) The solid solution state is non-magnetic; 6) Compared with 304 stainless steel, the price is higher.EASTKING STEEL can provide you with a large number of 904L stainless steel products. High quality and fast supply. Please feel free to click to consult.
2205 stainless steel plate is divided into cold rolled plate and hot rolled plate. Common size Thickness: 3.0mm-10.0mm, width has two kinds of width: 1800mm and 2000mm. Length: 6000mm or more (can be cut according to customer requirements). 2205 stainless steel alloy is a duplex stainless steel composed of 21% chromium, 2.5% molybdenum and 4.5% nickel nitrogen alloy. Next, let's understand the difference between 2205 stainless steel plate and 304 stainless steel plate?The difference between 2205 stainless steel plate and 304 stainless steel plate:1. The yield strength of 2205 stainless steel plate is more than twice as high as that of 304 stainless steel plate, and it has the requirements for forming sufficient plasticity. The wall thickness of storage tanks or pressure vessels made of duplex stainless steel is 30-50% less than that of commonly used 304 stainless steel plates, which is beneficial to reduce costs.2. It has excellent resistance to stress corrosion cracking. Even the duplex stainless steel with the lowest alloy content has higher resistance to stress corrosion cracking than 304 stainless steel, especially in the environment containing chloride ions. Stress corrosion is a prominent problem that is difficult to solve with ordinary 304 stainless steel plates.3. The corrosion resistance of 2205 stainless steel, which is most commonly used in many media, is better than ordinary 316L austenitic stainless steel, while super duplex stainless steel has extremely high corrosion resistance. In some media, such as acetic acid, formic acid, etc. It can even replace high-alloy austenitic stainless steels and even corrosion-resistant alloys.4. 2205 stainless steel plate has good local corrosion resistance. Compared with 304 stainless steel plate with equivalent alloy content, its wear corrosion resistance and fatigue corrosion resistance are better than austenitic stainless steel.5. The linear expansion coefficient of 2205 stainless steel plate is lower than that of 304 stainless steel plate, which is close to carbon steel. It is suitable for connection with carbon steel and has important engineering significance, such as the production of composite plates or linings.6. No matter under the conditions of dynamic or static load, it has higher energy absorption capacity than 304 stainless steel plate, which is suitable for structural parts to deal with sudden accidents such as collision and explosion. 2205 stainless steel plate has obvious advantages and has practical application value.