Stainless steel plate has smooth surface, high plasticity, toughness and mechanical strength, and is resistant to acid, alkaline gas, solution and other media corrosion. It is an alloy steel that is not easy to rust, but it is not absolutely rust free. Stainless steel plate refers to the steel plate resistant to weak medium corrosion such as atmosphere, steam and water, while acid resistant steel plate refers to the steel plate resistant to chemical etching medium corrosion such as acid, alkali and salt. Stainless steel plate has a history of more than one century since its appearance at the beginning of the 20th century.

Stainless steel plate is generally the general name of stainless steel plate and acid resistant steel plate. At the beginning of this century, the development of stainless steel plate has laid an important material and technological foundation for the development of modern industry and scientific and technological progress. There are many kinds of stainless steel plates with different properties, which have gradually formed several categories in the process of development. According to the structure, it can be divided into four categories: austenitic stainless steel plate, martensitic stainless steel plate (including precipitation hardening stainless steel plate), ferritic stainless steel plate, and austenitic and ferritic duplex stainless steel plate? According to the main chemical composition of the steel plate or some characteristic elements in the steel plate, it can be divided into chromium stainless steel plate, chromium nickel stainless steel plate, chromium nickel molybdenum stainless steel plate, low-carbon stainless steel plate, high molybdenum stainless steel plate, high-purity stainless steel plate, etc. According to the performance characteristics and uses of the steel plate, it can be divided into nitric acid resistant stainless steel plate, sulfuric acid resistant stainless steel plate, pitting resistant stainless steel plate, stress corrosion resistant stainless steel plate and high-strength stainless steel plate. According to the functional characteristics of the steel plate, it can be divided into low-temperature stainless steel plate, non-magnetic stainless steel plate, free cutting stainless steel plate, superplastic stainless steel plate, etc. At present, the commonly used classification method is based on the structural characteristics of the steel plate, the chemical composition characteristics of the steel plate and the combination of the two. It is generally divided into martensitic stainless steel plate, ferritic stainless steel plate, austenitic stainless steel plate, duplex stainless steel plate and precipitation hardening stainless steel plate, or chromium stainless steel plate and nickel stainless steel plate. Typical uses: pulp and paper equipment, heat exchanger, mechanical equipment, dyeing equipment, film processing equipment, pipes, materials for external use of buildings in coastal areas, etc.

Stainless steel plate has smooth surface, high plasticity, toughness and mechanical strength, and is resistant to acid, alkaline gas, solution and other media corrosion. It is an alloy steel that is not easy to rust, but it is not absolutely rust free.

performance

Corrosion resistance

The stainless steel plate has the same resistance to general corrosion as the unstable nickel chromium alloy 304. Long time heating in the temperature range of chromium carbide may affect the performance of alloys 321 and 347 in harsh corrosive media. It is mainly used in high-temperature applications, which require the material to have strong resistance to sensitization to prevent intergranular corrosion at lower temperatures.

High temperature oxidation resistance

Stainless steel plates have high-temperature oxidation resistance, but the oxidation rate will be affected by inherent factors such as exposure environment and product morphology.

physical property

The total heat transfer coefficient of metal depends on other factors besides the thermal conductivity of metal. In most cases, the film heat dissipation coefficient, rust scale and metal surface condition. Stainless steel can keep the surface clean, so its heat transfer is better than other metals with higher thermal conductivity. Liaocheng Suntory stainless steel provides VIII. Technical standards for stainless steel plates: high strength stainless steel plates with excellent corrosion resistance, bending processing performance, toughness of welding parts, and stamping processing performance of welding parts and their manufacturing methods. Specifically, the stainless steel plate containing an appropriate content of Si, Mn, P, s, Al and Ni with C: less than 0.02%, N: less than 0.02%, Cr: more than 11% and less than 17%, and meeting the requirements of 12 ≤ Cr Mo 1.5si ≤ 17, 1 ≤ Ni 30 (c n) 0.5 (Mn Cu) ≤ 4, Cr 0.5 (Ni Cu) 3.3mo ≥ 16.0, 0.006 ≤ C n ≤ 0.030 is heated to 850 ~ 1250 ℃, and then cooled at a cooling rate of more than 1 ℃ / s. In this way, a high-strength stainless steel plate having a structure containing martensite with a volume fraction of 12% or more, high strength of 730 MPa or more, corrosion resistance, bending workability, and toughness in the weld heat affected zone can be obtained. The stamping performance of the welded part can be significantly improved by reusing Mo, B, etc.

The flame of oxygen and gas can not cut stainless steel plate because stainless steel is not easy to be oxidized.