Stainless steel sheet is mainly used for metal products, machinery manufacturing, automotive, precision electronics, edible machinery, kitchen utensils, chemical equipment, household appliances, sanitary ware, elevators, pressure vessels, solar energy, household appliances. The following small series for everyone to introduce the relevant knowledge of stainless steel sheet.
Stainless steel sheet properties:
According to the method of production divided into hot and cold rolled two, including the thickness of 0.5-4 mm thin plate and 4.5-35 mm thick plate.
According to the organizational characteristics of the steel is divided into five categories: austenitic, austenite - ferrite, ferrite, martensite, precipitation hardening.
It is required 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, and acetic acid, and is widely used in chemical industry, food, medicine, papermaking, petroleum, atomic energy, etc. Industry, and construction, kitchen utensils, cutlery, vehicles, home appliances and other parts.
In order to ensure that the mechanical properties such as yield strength, tensile strength, elongation, and hardness of various types of stainless steel plates meet the requirements, the steel plates must be subjected to annealing, solution treatment, and aging treatment before delivery.
Stainless steel plate surface smooth, high plasticity, toughness and mechanical strength, acid, alkaline gas, solution and other media corrosion. It is an alloy steel that does not easily rust, but it is not absolutely rustless.
The corrosion resistance of stainless steel mainly depends on its alloy composition (chromium, nickel, titanium, silicon, aluminum, etc.) and its internal structure. The main role of chromium is chromium. Chromium has a high chemical stability and can form a passivation film on the surface of the steel to isolate the metal from the outside, protect the steel plate from oxidation, and increase the corrosion resistance of the steel plate. After the passivation film is destroyed, the corrosion resistance decreases.
Stainless steel plate technical standards:
High-strength stainless steel sheet with excellent corrosion resistance, bending workability, and weld joint toughness of the stainless steel sheet, and excellent stamping performance at the welded part, and a method for producing the same. Specifically, it contains Si: 0.02% or less, N: 0.02% or less, Cr: 11% or more and less than 17%, and appropriate content of Si, Mn, P, S, Al, Ni, and satisfies 12 ≤ Cr Mo 1.5Si ≤ 17, 1 ≤ Ni 30 (CN) 0.5 (Mn Cu) ≤ 4, Cr 0.5 (Ni Cu) 3.3Mo ≥ 16.0, 0.006 ≤ CN ≤ 0.030 stainless steel plate heated to 850 ~ 1250 °C, and then carried out at 1 °C / s The above cooling rate cooling heat treatment. This can be used as a high-strength stainless steel plate containing a volume fraction of 12% or more martensite, a high strength of 730 MPa or more, corrosion resistance and bending workability, and excellent weld heat affected zone toughness. The use of Mo, B, etc., can significantly improve the stamping performance of the welded part. Oxygen plus gas flames cannot cut stainless steel plates because stainless steel is not easily oxidized.
The main difference between stainless steel plate and rolled plate:
1. The thickness of the stainless steel plate of the positive material will be within the specified size, for example, Lianzhong stainless steel plate, its thickness is uniform, generally 1 end, such as 0.51, then only 0.5; and the rolling material is generally only 0.5, or At 0.49, it's thinner at 0.45.
2. The stainless steel plate of the positive material is very soft milky white, while the rolling will have rollers and stamps and other bad marks;
3. The phenomenon of uneven thickness is noticeable in the rolling of stainless steel. The thickness of both sides of the entire plate is thin, and stainless steel plates do not normally exhibit this phenomenon.
advantage:
1, stainless steel rolling board, can better meet the market demand, stainless steel large manufacturers flow to market the width of the product, a lot of thickness can not meet market demand, and the rolling board just to meet the relevant needs.
2, low prices, in general, the thickness of the same thickness of the product rolled plate is 800 to 1,000 yuan cheaper than the large manufacturers of cold-rolled plates.
Disadvantages:
1, the quality of instability, technically and large stainless steel manufacturers have a gap.
2, the market is fierce and competitive, and the product mix is ​​unstable.
3, the toughness difference after the deep drawing is easy to break.
Editor's summary: The above is Xiaobian's knowledge about stainless steel plates. More practical knowledge, please pay attention to Qijia information.
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