The elevator industry stainless steel usage profile
Published： 2013/01/29     Views: 6244

China's elevator industry maintain rapid development momentum after 2000 years, yield average annual growth rate of around 30%, to 2008, China's elevator production reached 345000 units, The use of stainless steel quantity is considerable .According to the data, visit on purchasing stainless steel 100 tons or more enterprises accounted for 10% of the total, on purchasing stainless steel fifty tons occupy 30%, and the enterprise on purchasing fifty tons of 60%, at present the national statistics elevator production enterprise nearly 400 , remove not to use or rarely use stainless steel elevator components manufacturers, conservative estimate bulk purchase stainless steel elevator enterprise will have 200 .These elevators customers become stainless steel traders of a place of strategic importance, but to the elevator production enterprise, they for stainless steel and have what kind of requirements

From usage, the most widely used type of steel is 304 , 304 has excellent corrosion resistance and mechanical properties,and became the first choice of the enterprise, as a conventional type, each big steel 304 quality is guaranteed.

430 grade of steel has been widely used in the elevator industry,  the key to attract the elevator enterprises is the low price (compare with 304), the domestic steel mills have 430 , the sufficient supply of goods and the stable quality is also one of the factors for the elevator enterprises to choose .

At present, new steel grade 439 and 443 is also  popular in elevator enterprises , in the elevator enterprises, use of the material about 50% of the enterprise. This kind of material has a common, price is lower than 304, the corrosion resistance is higher than 430 , belong to more intermediate materials, today ,the elevator industry tend to be small profit era , cost reduction is an eternal topic, to ensure the good performance characteristics premise, personal forecast ,the usage of 439 and 443 will be more and more big in the elevator industry consumption.

200 series share is also gradually expanding in the elevator industry, which is particularly reflected in the smaller elevator companies. Elevator enterprise customer base is diverse, widespread The stainless iron corrosion resistance is worse than the point of view of the "stainless steel", similar to 304 200 non-magnetic stainless steel has a wide range of living space, the same in the elevator industry, using industry cheap 201 greatly compressed the manufacturing cost of the elevator, which has been recognized by some customers

Because of cost considerations, the more inexpensive material appears in elevator manufacturing, such as stainless steel clad plate material, by the explosion method combined with a layer of 304, the middle of the base material of sufficient strength Q235 carbon steel materials, also be applied in the industry,part of the elevator companies are already using such materials, unused part elevators showing interest, but showing interest in such material. Beautiful appearance, such material has a stainless steel processing performance is also good. But because of the 304 layer is very thin, typically only 10% of the total thickness, so, if subjected to scratches to expose the base material, then, very prone to rusting.

Stainless steel elevator companies concentrated in the thickness of 0.8mm, 1.0mm, 1.2mm, 1.5mm, in the interior door panels, armrests and other parts. For decorative surface, the most widely used oil mill HL, followed by the mirror、NO.4、 etching and titanium surface.

As the elevator customer groups have the larger firm size in this interview,
From the purchase channels are relatively fixed,basically concentrated in Wuxi and some neighboring traders, these traders generally have strong surface-processing capacity, quality stable and timely delivery.

Elevator with stainless steel for quality requirements are relatively high, mainly in three areas, the first is a flat plate, such as a mirror panel ，if there is uneven plate surface, the mirror will be distorted, stainless steel plate, general requires no warping, no abdominal waves, edge waves should be controlled within 1mm. The dimensional accuracy is mainly reflected in the diagonal tolerance, general requirements for control within 1mm ultra poor will impact on sheet metal or assembled. The third is the surface requirements, the abnormal grain of sand, color, scratches, pressure points, such as surface defects are not allowed to exist.

Lies in the exchange of these stainless steel enterprises, these enterprises for the development of stainless steel materials generally showed a lot of interest. Even not use these new materials, the performance of a variety of materials and range of applications for the development direction of the elevator industry must have a reference to the role of another traditional 304 price fluctuations, rises in the short term large elevator manufacturers can not withstand the pressure of rising costs, the price is relatively stable when 400 new material would be a better choice

Requirements for suppliers, the project of the first requirements of the elevator enterprises is generally the same: quality. Supplier quality including stainless steel material and stable quality, timely delivery, the validity of the objection handling. In fact, these elevator companies existing suppliers is also expressed general satisfaction, both from the quality of the materials and supply services. Shows that these suppliers Elevators attention, after all, the elevator with the stainless steel with high added value, relative to the trading profits, which processing profits of the company effective growth point.