Service life of stainless steel airport chair

Author: airport seating | Time:

If you need to extend the use of stainless steel airport chair time, must be in the usual maintenance is quite in place, otherwise the stainless steel airport is also good.

Can not afford to play at the airport, station, hospital and other places where the flow of these people are very large consumption.

We set the use of the environment is indoor:

304 stainless steel Airport chair:

1 chemical components: carbon is less than 0.08, less than 1 of silicon, manganese chromium is less than 2, 18~20, n = 0.1, P = 0.045, s = 0.03, Ni 8~11,

2 types of properties: tensile strength: 520RM N/mm2: 205:RP0.2N/mm2, yield strength, elongation: 40 A5% hardness: less than 187;

3 service life: 5 years or so

201# stainless steel:

1 chemical components: carbon: less than or equal to 0.15 and less than or equal to 0.75, silicon manganese: 5.5 ~ 7.50, 16 ~ 18, Cr: n: = 0.25, P = 0.060: sulfur: 0.030, nickel copper:: 3.50-5.50%, 0.8%, 1.5% high copper copper;

2 models: the physical properties of the tensile strength of 520MPa, yield strength 275MPa, elongation: 55 to 60%, 29000000 psi equivalent elastic modulus is 203000MPa, hardness (Brinell hardness) HRB<183N/mm2 (MPa),.280lbs/cubic inch (density: the density of 7.93g/cm.)

3 service life: 3 years or so

Cause 304 stainless steel materials appear rusty phenomenon, there may be the following reasons:

1, 304 chloride ion:

Chloride ion is widespread, such as salt / sweat / water / sea breeze / soil and so on. Stainless steel in the presence of chloride ions in the environment, corrosion is very fast, and even more than ordinary low carbon steel. Therefore, the use of the environment of stainless steel has a requirement, but also need to always wipe, remove the dust, keep clean and dry. (so you can give him a "improper use".) The United States has an example: a business with an oak container containing a certain

Chloride solution, the container has been used for nearly a hundred years, the last century, 90s plans to replace, due to the lack of modern oak materials, 16 days after the replacement of stainless steel due to corrosion leakage.

304, 2 solid solution treatment:

Alloy elements not dissolve in matrix, the matrix microstructure of low alloy, poor corrosion resistance.

304, 3 intergranular corrosion:

The tendency of intergranular corrosion of materials containing titanium and niobium. Adding titanium and niobium, and then with a stable treatment, can reduce intergranular corrosion. A high alloy steel corrosion resistance in the air or chemical corrosion, stainless steel is a beautiful surface and good corrosion resistance, without plating surface treatment, its inherent surface properties of stainless steel, used in many aspects of steel, often called stainless steel. Represents the properties of 13 steel, chromium nickel steel and high alloy steel 18-8. From the perspective of metallography analysis, because stainless steel containing chromium and chromium on the surface to form a thin film, the film off the invasion and oxygen in steel corrosion effect. In order to maintain the inherent corrosion resistance of stainless steel, steel must contain more than 12% of the chromium. Occasions for welding. The lower carbon content makes the heat affected zone near the weld.

The precipitated carbides are reduced to a minimum, and carbide precipitation may result in the generation of intergranular corrosion (welding erosion) in some environments.

4, 304 surface phenomenon:

The surface mark refers to the phenomenon of 304 stainless steel deep processing or processing product line or dot occurred after grinding, concave point defects on the surface of the product.

Reason: the surface, the mold surface has the foreign matter, the blank holder pad surface has the scar.

Countermeasures: scar removal of foreign bodies, before processing, you can also remove the orange peel by fully grinding.

The orange peel phenomenon refers to the 304 stainless steel products in grinding or other situations, like the surface of orange peel like shape phenomenon.

Reason: grinding is not sufficient, the greater the more serious orange processing raw materials, coarse grain, softening heat treatment.

Countermeasures: deep processing products fully grinding, select the appropriate heat treatment conditions, control the grain size of raw materials.

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	Foshan Oshujian Furniture Manufacturing Co., Ltd.
	Huangji Road,jiujiang Nanhai Foshan,Guangdong,China.
	Tel: 0086 757 8655 6583 / Fax: 0086 757 86513332
	sales8@oshujian.com

Service life of stainless steel airport chair

Service life of stainless steel airport chair

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