The type of stainless steel pipe (一)
A, austenite size stainless steel pipe
Austenite size stainless steel pipe is the most important type of stainless steel, the 70% of the total output and consumption of stainless steel. According to the way of alloying austenite size stainless steel can be divided into nickel chrome steel and iron chromium manganese steel two kinds big. The former is austenitizing elements with nickel, is the main body of austenitic steel; The latter is the manganese, nitrogen instead of the expensive nickel section nickel steel grade.
Overall speaking, austenitic steel corrosion resistance is good, has the good comprehensive mechanical properties and process performance, but the strength and hardness is low.
Second, the iron grain size stainless steel pipe
Stainless steel pipe containing chromium iron grain size by 11% to 30%, basic does not contain nickel, nickel steel is section, in the condition of using the organizational structure is given priority to with ferrite. Iron element size and high strength stainless steel pipe, and cold hardening tend to be low, the resistance to chloride stress corrosion, pit corrosion, crevice corrosion and local corrosion performance is good, but is sensitive to intergranular corrosion, poor toughness at low temperature.