ASTM A240 / A240M - 01 2205 duplex stainless steel pipe is made up of 21% chromium alloy, 2.5% nitrogen and 4.5% molybdenum nickel alloy consisting of duplex stainless steel. It has high strength, good impact toughness and good resistance to stress corrosion in whole or in part. 2205 duplex stainless steel tube bending strength is twice that of austenitic stainless steel, this feature enables designers when designing products lose weight, make this alloy is better than 316317 L have price advantage. This alloy is particularly suited to - + 50 ° F / 600 ° F temperature range. Beyond the temperature range of applications, can also think about this kind of alloy, but there are some limitations, especially when applied to the welding structure.
1.2205 duplex stainless steel pipe alloy compare with stainless steel 316L and 317L austenitic stainless steel, compared to 2205 alloy on the pitting corrosion and crevice corrosion resistance is superior, it has the very high corrosion resistant ability, compared with the austenitic, lower its thermal contraction coefficient, thermal conductivity is higher.
2. stainless steel pipe 2205 duplex stainless steel alloy compared with austenitic stainless steel, its compressive strength is its two times, compared with 316L and 317L, the designer can reduce the weight. Especially suitable for 2205 alloy + 50 ° F / 600 ° F temperature range, the severely restricted under the condition of (especially about welding structure), also can be used to lower the temperature.
Chemical composition: C or less 0.030 Mn Si acuities were 2.00 2.00 p 0.030 S or less or less acuities were 0.020 to 22.0 ~ 23.0 Ni Cr 4.5 ~ 6.5 N0.14 Mo3.0 ~ 3.5 ~ 3.5 (austenitic - iron grain type)