316 stainless steel, 18Cr-12Ni-2.5Mo Because of the addition of Mo, it has excellent corrosion resistance, atmospheric corrosion resistance and high temperature strength. It can be used under harsh conditions; it has excellent work hardening property (non-magnetic). Equipment for the use of equipment, chemicals, dyes, paper, oxalic acid, fertilizers, etc. in seawater; photo, food industry, coastal facilities, ropes, CD rods, bolts, nuts. 316 stainless steel chemical composition: C ≤ 0.08, Si ≤ 1.00, Mn ≤ 2.00, P ≤ 0.035, S ≤ 0.03, Ni: 10.0-14.0, Cr: 16.0-18.5, Mo: 2.0-3.0. 316 stainless steel mechanical properties, tensile Strength (Mpa) 620 MIN, yield strength (Mpa) 310 MIN, elongation (%) 30 MIN, area reduction (%) 40 MIN, 316 stainless steel tube density 8.03 g/cm3, austenitic stainless steel generally uses this value
Stainless steel is generally a general term for stainless steel and acid-resistant steel. Stainless steel refers to steel that is resistant to corrosion by weak media such as atmosphere, steam and water, while acid-resistant steel refers to steel that is resistant to corrosion by chemically etched media such as acid, alkali and salt. Stainless steel has been around since the beginning of this century and has a history of more than 90 years. The invention of stainless steel is a major achievement in the history of metallurgy in the world. The development of stainless steel has laid an important material and technical foundation for the development of modern industry and scientific and technological progress. There are many types of stainless steel and different properties. It has gradually formed several major categories in the development process. According to the structure of the organization, it is divided into four categories: Markov stainless steel (including precipitation hardening stainless steel), ferritic stainless steel, austenitic stainless steel and austenitic and ferrite duplex stainless steel; according to the main chemical composition in steel or Some characteristic elements in steel are classified into chromium stainless steel, chrome-nickel stainless steel, chrome-nickel-molybdenum stainless steel, low-carbon stainless steel, high-molybdenum stainless steel, high-purity stainless steel, etc.; according to the performance characteristics and use classification of steel, it is divided into nitric acid-resistant stainless steel. , sulfuric acid resistant stainless steel, pitting resistant stainless steel, stress corrosion resistant stainless steel, high strength stainless steel, etc.; classified according to the functional characteristics of steel, divided into low temperature stainless steel, non-magnetic stainless steel, free cutting stainless steel, super plastic stainless steel and so on. At present, the commonly used classification methods are classified according to the structural characteristics of steel and the chemical composition of steel and the combination of the two. Generally divided into martensitic stainless steel, ferritic stainless steel, austenitic stainless steel, duplex stainless steel plate and precipitation hardening stainless steel, etc., or divided into two categories of chromium stainless steel and nickel stainless steel. Stainless steel is generally used in anti-corrosive environments, as well as medical equipment and daily necessities. According to the main chemical composition, it is divided into chromium stainless steel, chrome-nickel stainless steel and chrome-manganese-nitrogen stainless steel; it can also be divided into acid-resistant stainless steel and heat-resistant stainless steel with performance characteristics; It is usually classified by metallographic organization. Classified by metallographic structure: ferrite (F) type stainless steel, martensite (M) type stainless steel, austenitic (A) type stainless steel, austenite-ferrite (AF) type duplex stainless steel, Austria A castitic-martensitic (AM) type duplex stainless steel and precipitation hardened (PH) type stainless steel.
Edit this paragraph ferritic stainless steel
Its internal microstructure is ferrite, and its chromium content is in the range of 11.5% to 32.0%. As the chromium content increases, its acid resistance also increases. When molybdenum (Mo) is added, the acid corrosion resistance and stress corrosion resistance can be improved. The national standard grades of such stainless steels are 00Cr12, 1Cr17, 00Cr17Mo, 00Cr30Mo2 and the like.
Edit this paragraph martensitic stainless steel
Its microstructure is martensite. The mass fraction of chromium in this type of steel is 11.5%~18.0%, but the mass fraction of carbon is up to 0.6%. The increase in carbon content increases the strength and hardness of the steel. The small amount of nickel added to this type of steel promotes the formation of martensite while improving its corrosion resistance. This type of steel has poor weldability. The steel plates listed in the national standard grades include 1Cr13, 2 Cr13, 3 Cr13, 1 Cr17Ni2 and the like.