One, the properties of stainless steel sheet introduction
1, according to the method of hot-rolled and cold-rolled two kinds, including the thickness of 0.5-4 millimeters of thin plate and 4.5-35 millimeters of thick plate. According to the organizational characteristics of the steel is divided into five categories: austenitic, austenitic - ferrite, ferrite, martensite, precipitation hardening.
2, required to withstand oxalic acid, sulfuric acid - ferric sulfate, nitric acid, nitric acid - hydrofluoric acid, sulfuric acid - copper sulfate, phosphoric acid, formic acid, acetic acid and other kinds of acid corrosion, is widely used in the chemical industry, food, pharmaceuticals, papermaking, petroleum, atomic energy and other industries, as well as construction, kitchen utensils, cutlery, vehicles, household appliances of all kinds of parts.
3, in order to ensure that all types of stainless steel plate yield strength, tensile strength, elongation and hardness and other mechanical properties in line with the requirements, the steel plate must be annealed, solution treatment, aging treatment and other heat treatment before delivery. Stainless steel plate has a smooth surface, high plasticity, toughness and mechanical strength, and is resistant to corrosion by acid, alkaline gases, solutions and other media. It is an alloy steel that is not prone to rust, but not absolutely rust-free.
4, the corrosion resistance of stainless steel depends mainly on its alloy composition (chromium, nickel, titanium, silicon, aluminum, etc.) and internal organizational structure, plays a major role is the element chromium. Chromium has a high chemical stability, can form a passivation film on the steel surface, so that the metal is isolated from the outside world, to protect the steel plate from oxidation, increase the corrosion resistance of the steel plate. After the destruction of the passivation film, corrosion resistance decreases.
Two, stainless steel plate classification
1, ferritic stainless steel
Ferrite stainless steel is the most common type of stainless steel material, is a kind of ferrite organization in the use of the state is mainly stainless steel. The chromium content of this type of stainless steel is between 11% and 30%, in addition, it also contains a small amount of molybdenum, titanium, niobium and other elements. Ferritic stainless steel in addition to good corrosion resistance, the most important feature is good oxidation resistance, excellent stress resistance, and it also has good thermal conductivity and a very small coefficient of expansion. However, the plasticity of ferritic stainless steel is poor, so this kind of stainless steel material is mainly used to make corrosion-resistant parts.
2, austenitic stainless steel
Austenitic stainless steel is a kind of stainless steel material with stable austenitic organization inside, which contains 18% of chromium and 8% of nickel in addition to a small amount of molybdenum, titanium, nitrogen and other elements. This kind of stainless steel material belongs to is a comprehensive performance good product, can resist the corrosion of a variety of media. Moreover, the toughness and plasticity of austenitic stainless steel are relatively good, at the same time, its easy cutting performance is also very good. At present, austenitic stainless steel materials are widely used in major industries.
3, austenitic - ferritic duplex stainless steel
Austenitic - ferritic duplex stainless steel is a kind of internal austenite and ferrite organization structure of half of the stainless steel products. It has the characteristics of austenitic stainless steel and ferritic stainless steel materials, and compared with ferritic stainless steel, its plasticity is better, higher toughness, compared with austenitic stainless steel, its thermal conductivity is better, the coefficient of expansion is smaller.
4, martensitic stainless steel
Martensitic stainless steel belongs to the hardenable stainless steel materials, the biggest feature of this kind of stainless steel materials is that the mechanical properties of the stainless steel materials can be changed through heat treatment. At present, this kind of stainless steel material is mainly used for steam turbine blades, surgical instruments and other products in the processing of production.
Through today's article we learned about stainless steel plate properties and classification. Everyone should choose according to their own decoration needs when choosing. Stainless steel material is widely used in building decoration because of its better performance.