The stainless steel plate has a smooth surface, high plasticity, toughness and mechanical strength, and is resistant to corrosion by acids, alkaline gases, solutions and other media. It is an alloy steel that is not easy to rust, but it is not absolutely rust-free. Stainless steel plates refer to steel plates that are resistant to corrosion by weak media such as air, steam, and water, while acid-resistant steel plates refer to steel plates that are resistant to corrosion by chemically aggressive media such as acids, alkalis, and salts. Stainless steel plate has a history of more than a century since its appearance in the early 20th century.

Brief introduction of stainless steel plate

Stainless steel plate is generally a general term for stainless steel plate and acid-resistant steel plate. Coming out at the beginning of this century, the development of stainless steel plates has laid an important material and technical foundation for the development of modern industry and scientific and technological progress. There are many kinds of stainless steel plates with different properties. It has gradually formed several categories in the development process. According to the organizational structure, it is divided into four categories: austenitic stainless steel plate, martensitic stainless steel plate (including precipitation hardening stainless steel plate), ferritic stainless steel plate, and austenitic plus ferritic duplex stainless steel plate. According to the steel plate Classified by the main chemical composition or some characteristic elements in the steel plate, it is 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 is divided into nitric acid resistant stainless steel plate, sulfuric acid resistant stainless steel plate, pitting corrosion resistant stainless steel plate, stress corrosion resistant stainless steel plate, high strength stainless steel plate, etc. According to the functional characteristics of the steel plate, it is divided into low-temperature stainless steel plate, non-magnetic stainless steel plate, free-cutting stainless steel plate, superplastic stainless steel plate, etc. The commonly used classification method is to classify according to 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, etc. or divided into two categories: chromium stainless steel plate and nickel stainless steel plate. Typical applications: pulp and paper equipment heat exchangers, mechanical equipment, dyeing equipment, film processing equipment, pipelines, external materials for buildings in coastal areas, etc.

According to the production method, it can be divided into two types: hot rolling and cold rolling, including thin cold plate with a thickness of 0.5.10-885 mm and medium and thick plate with a thickness of 4.5-100 mm.

It is required to be able to withstand the corrosion of various acids such as oxalic acid, sulfuric acid-ferric sulfate, nitric acid, nitric acid-hydrofluoric acid, sulfuric acid-copper sulfate, phosphoric acid, formic acid, acetic acid, etc. It is widely used in chemical industry, food, medicine, papermaking, petroleum, atomic energy, etc. Industry, as well as construction, kitchen utensils, tableware, vehicles, various parts of household appliances.

In order to ensure that the mechanical properties such as yield strength, tensile strength, elongation and hardness of various stainless steel plates meet the requirements, the steel plates must undergo heat treatment such as annealing, solution treatment, and aging treatment before delivery. 05.10 88.57.29.38 special symbols.

The corrosion resistance of stainless steel mainly depends on its alloy composition (chromium, nickel, titanium, silicon, aluminum, manganese, etc.) and internal structure.

According to the production method, it is divided into two types: hot rolling and cold rolling, and according to the structural characteristics of the steel type, it is divided into 5 categories: austenitic type, austenite-ferritic type, ferritic type, martensitic type, and precipitation hardening type.

The stainless steel plate has a smooth surface, high plasticity, toughness and mechanical strength, and is resistant to corrosion by acids, alkaline gases, solutions and other media. It is an alloy steel that is not easy to rust, but it is not absolutely rust-free.

Properties of stainless steel plate

Corrosion resistance

Stainless steel has a similar ability to resist general corrosion as the unstable nickel-chromium alloy 304. Prolonged heating in the temperature range of the chromium carbide level may affect the performance of alloys 321 and 347 in harsh corrosive media. Primarily 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

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

physical properties

The overall heat transfer coefficient of a metal depends on other factors besides the thermal conductivity of the metal. In most cases, the heat dissipation coefficient of the film, the scale and the surface condition of the metal. Stainless steel keeps the surface clean, so it transfers heat better than other metals with higher thermal conductivity. Liaocheng Suntory Stainless Steel provides 8. Technical standards for stainless steel plates High-strength stainless steel plates with excellent corrosion resistance, bending performance, toughness of welded parts, and stamping performance of welded parts and their manufacturing methods. Specifically, C: below 0.02%, N: below 0.02%, Cr: more than 11% and less than 17%, appropriate content of Si, Mn, P, S, Al, Ni, and satisfying 12≤Cr Mo 1.5Si≤ 17. The stainless steel plate with 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°C, and then carried out at 1°C/s Heat treatment for cooling above the cooling rate. In this way, it can become a high-strength stainless steel plate with a structure containing more than 12% martensite by volume, high strength above 730MPa, corrosion resistance and bending performance, and excellent toughness in the welding heat-affected zone. Reusing Mo, B, etc. can significantly improve the stamping performance of the welded part.

Oxygen plus gas flame cannot cut stainless steel plate because stainless steel is not easy to be oxidized.

5CM thick stainless steel plate should be processed with special cutting tools, such as:

(1) Larger wattage Laser Cutting machine (laser cutting machine)

(2) Hydraulic saw machine

(3) Disc

(4) Human hand saw

(5) Wire Cutting machine (wire cutting machine).

(6) High-pressure water jet cutting (professional water jet cutting: Shanghai Xinwei)

(7) Plasma arc cutting

Density

Density for 400" series: 7.75

Density of 304, 321, 304L, 202, 201 7.93 Density of 310s, 309s, 316L, 316 7.98