00Cr22Ni5Mo3N stainless steel
Introduction
Following the development of 3RE60 Sweden after the duplex stainless steel, and timber for the oil and gas pipeline industry first developed SAF2205 steel, incorporated the ASTM A789, A790, A240, A276 and other standards, the U.S. trademark for the UNS S31803; 20 1980, States similar steels have been developed and incorporated into the standard. Germany W-Nr.1.4462, DIN X2Gr-NiMoN2253, France Z2CND-22-05-03, Sweden, SS2377, the United Kingdom BS318S13 and so on. SAF2205 steel used since the late 1970s, oil and gas pipelines, which is the earliest use of duplex stainless steel in this area, in order to improve the balance and avoid the harmful phase-phase precipitation in recent years, also sent from UNS S31803 steel birth UNS S32205, which has narrower range, ASTM steel specially developed for both metallurgical products harmful intermetallic phase test (ASTM A923-98). In the 1980s China began to develop quite SAF2205 duplex stainless steel 00Cr22Ni5Mo3N it in neutral chloride solution and H2S in the resistance to stress corrosion than 304L, 316L austenitic stainless steel and duplex stainless steel type 18-5Mo . Can be cold, hot processing and forming, good weldability, suitable for the structural materials of steel, duplex stainless steel is the world in the application of the most common grades.
Chemical composition
Carbon (C) ≤ 0.03,
      Manganese (Mn) ≤ 2.0,
      Nickel (Ni) 5.0 ~ 6.0,
      Silicon (Si) ≤ 1.0,
      Phosphorus (P) ≤ 0.03,
      Sulfur (S) ≤ 0.02,
      Chromium (Cr) 21.0 ~ 23.0,
      Nitrogen (N) 0.12 ~ 0.20,
      Molybdenum (Mo) 2.75 ~ 3.25