The most well-known feature of stainless steel is its excellent corrosion resistance. The dense oxide film formed by chromium is the key to corrosion resistance. This layer of oxide film can effectively resist the erosion of atmosphere, water, acid, alkali and other common corrosive media. Taking the common 304 stainless steel as an example, under the ordinary indoor environment and dry climate conditions, it can keep bright as new for a long time, without rust and corrosion. However, when the service environment becomes harsh, such as in the coastal areas with high humidity and a large amount of salt, or in the environment exposed to strong acid and alkali in chemical production, the differences in corrosion resistance of different types of stainless steel become prominent. Like 316 stainless steel, due to the addition of 2-3% molybdenum element, it has stronger resistance to chloride, pitting corrosion and crevice corrosion, and performs well in these harsh environments.

High strength stainless steel has excellent mechanical properties and can meet various high strength requirements. The internal structure of different types of stainless steel can be adjusted by appropriate heat treatment process, so as to obtain different degrees of strength. Martensitic stainless steel, for example, can obtain high strength and hardness after quenching and tempering, and is widely used in the fields requiring high strength and wear resistance, such as cutting tools, bearings, turbine blades, etc. In the construction field, stainless steel structural parts can reduce the weight of the building itself and improve the stability and seismic performance of the building on the premise of ensuring safety by virtue of their high strength characteristics.

High temperature resistance

In high temperature environment, stainless steel can still maintain good performance and stability. Some special types of stainless steel can withstand the temperature difference from -50 ℃ to 800 ℃. For example, in industrial heating furnaces, boilers and other equipment, high temperature resistant stainless steel materials are often used to manufacture furnace tubes and furnace internals. These stainless steel parts work for a long time in high temperature environment, and will not deform or reduce strength due to high temperature, ensuring the normal operation of the equipment.

Recyclability

Stainless steel is also an extremely environmentally friendly material, which is 100% recyclable. In the new stainless steel, about 60% of the material comes from recycled materials. Recycling stainless steel can not only reduce the dependence on primary mineral resources, reduce energy consumption, but also significantly reduce carbon emissions in the process of steel production. According to statistics, the use of recycled materials can save more than 30% of energy. Moreover, the average service life of stainless steel products is more than 20 years. After the end of its service life, recycling can realize the recycling of resources, which is in line with the current concept of sustainable development.