As we all know, stainless steel welded pipe has heat resistance and corrosion resistance. What's the impact? What are the requirements? Let's take a look at the performance that is particularly important in high-temperature environments and the current overview of heat-resistant stainless steel. In addition to using wet etching, stainless steel welded pipes also have high-temperature performance, and can be used at high temperatures due to the following components: a large amount of chromium.
The properties required for heat-resistant stainless steel are widely used in automotive exhaust system components and household heaters in addition to industrial heat treatment materials (such as general heat treatment furnaces and industrial heat-resistant components, boilers and reactor materials for thermal power generation) . Used in the chemical industry. Wait for daily necessities. The performance required when used at high temperatures is diverse, such as corrosion resistance, high temperature strength, thermal expansion, etc. Performance requirements of heat-resistant stainless steel welded pipe.
The characteristics required for heat-resistant stainless steel welded pipes in a high-temperature environment are different from those required for temperatures near normal temperature and water. In a high-temperature environment, most of them are placed under various combustion gases, so corrosion resistance in a corrosive atmosphere is required, and the corrosion of this high-temperature corrosive gas is called high-temperature corrosion.
The performance required for heat-resistant stainless steel is corrosion at high temperatures, generally high-temperature oxidation related to oxygen. As shown in Table 1, depending on the environment, sulfidation of H2S, SOx, etc., carburization of CO / CO2, and hydrocarbon gas may occur. Nitrification of NH3 / H2 gas, and halogenation of HCl and Cl2 halogenated gases.
