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Ordinary steel is carbon steel. That is a kind of iron-carbon alloys. When the portion of Chromium in the steel is greater than 12.5%,the steel can withstand high resistance to external media (acid, alkali salt) corrosion of the steel, called： stainless steel. The chemical composition of austenitic stainless steel features are chromium, nickel-based add molybdenum, tungsten, niobium and titanium and other elements. For stable austenite of Cr-Mn austenitic stainless steel, nickel added to further improve its toughness. The impact toughness of duplex stainless steel with nickel content increases. In general, two-phase region a + r its toughness and stability in the 160-200J of the range.

Stainless steel self-service terminal is a terminal case of self-help material is mainly nickel austenitic stainless steel. Austenitic stainless steel type 202 and 304 to the main label. 304 compared to 202 stainless steel performance is better. 304 stainless steel with stable austenite in chromium-nickel austenitic stainless steel toughness (at room temperature ductility and toughness at low temperatures) is very good, making it suitable for room temperature and low temperature in various environments. For stable austenite of Cr-Mn austenitic stainless steel, nickel added to further improve its toughness. 316 compared to 202 and 304 grade stainless steel is more resistant to corrosion, but only for a few occasions.

Compared to ordinary steel rust coatings, stainless steel self-service terminals to maintain long-term look at a relatively complete state. For scraping the outside world hit a certain capacity, and thus have favored high-end and outdoor applications. Stainless steel self-service terminal application to points mainly from the difficulty: the cost and processing difficulties. Stainless steel 304 self-service terminal to use materials, steel is relatively normal, 4-5 times more expensive. And the stainless steel surface coatings are generally not combined with other window dressing, it requires self-service terminal in processing stainless steel can not be processing equipment and environmental damage, or surface treatment is more troublesome.

Austenitic stainless steel due to its organization as a face-centered cubic structure, which at high temperatures with high strength and creep strength. As the role of external forces over time increase the occurrence of the phenomenon known as creep deformation. At a certain temperature, especially at high temperatures, the greater the creep load faster; in a certain load, the higher the temperature and the longer the greater the likelihood of creep. As the organizational structure for the body-centered cubic structure, and thus a sharp decline in strength at high temperatures. In 600 ℃, 304 stainless steel in various types of stainless steel in high temperature high strength, creep strength up. Section feather in the welding of stainless steel self-service terminal soldering technique used to reduce the duplication of processing excess heat, keeping the surface intact.

Austenitic stainless steel by binding from outside, in the material corresponding to its own internal deformation stress, and to material damage occurred. When the rapid processing of the repeated stress on a shock, the resulting stress and usually greater than at this time and some materials were brittle. This phenomenon is called stress impact. Metal fatigue and stress have a similar impact on the phenomenon, but the former is mainly associated with long plastic strain, while the latter is mainly the destruction of brittle failure. With Section feather processing of stainless steel for many years, in the cutting, the laser cutting process to further reduce the general press on the metal surface stress damage.

Section feather in stainless steel processing further abandon the traditional drawing surface treatment, followed by coating the surface of the second enhancement technology to make the machine after processing more uniform flat surface. Even if the enlarged view, it will be left with the processing of common potholes.