Austenitic stainless steel
Austenitic stainless steel is the most important type of stainless steel, and its output and dosage account for 70% of the total stainless steel. According to alloying way, austenitic stainless steel can be divided into chromium nickel steel and iron chromium manganese steel. The former is the main body of austenitic steel with nickel as the austenitic element. The latter is a type of nickel steel that USES manganese and nitrogen instead of expensive nickel.
Generally speaking, austenitic steel has good corrosion resistance, good comprehensive mechanical properties and technological properties, but low strength and hardness.
Second, iron type stainless steel
Ferritic stainless steel with chromium content of 11%-30% and basically no nickel, is a kind of nickel saving steel with ferrite as its main structure in the state of use.
Ferritin type stainless steel strength is higher, and the cold working hardening tendency is lower, resistance to chloride stress corrosion, pitting corrosion, crevice corrosion and other local corrosion performance is good, but sensitive to intergranular corrosion, low temperature toughness is poor.
Three, duplex stainless steel
It is generally believed that the presence of more than 15% of ferrite in the austenite matrix, or the presence of more than 15% of austenite in the ferrite matrix can be called austenite + ferrite duplex stainless steel.
Duplex stainless steel has the advantages of austenitic steel and ferrite steel.
Iv. Markov stainless steel
Martensitic stainless steel is a kind of steel that can be adjusted by heat treatment, its strength and hardness are higher.
Five, precipitation hardened stainless steel
Precipitation-hardened stainless steel is steel whose carbide is precipitated out by heat treatment so as to improve its strength.