Advantages Of Duplex 2205 Pipe Over 316L Stainless Steel Pipe
Compared with 316L and 317L stainless steels, 2205 duplex stainless steel has better performance in pitting and crevice corrosion resistance.It has high corrosion resistance and a lower coefficient of thermal expansion than austenite Higher thermal conductivity.
Compared with austenitic stainless steel pipes, 2205 duplex pipe has twice the compressive strength. Compared with 316L stainless steel pipe and 317L stainless steel pipe, designers can reduce their weight. 2205 alloy is particularly suitable for the temperature range of -50 ° F / + 600 ° F. Under severe restrictions (especially for welded structures), it can also be used at lower temperatures.
Chemical composition of 2205 duplex stainless steel: C≤0.030 Mn≤2.00 Si≤1.00 p≤0.030 S≤0.020 Cr 22.0 ～ 23.0 Ni 4.5 ～ 6.5 Mo3.0 ～ 3.5 N0.14 ～ 0.20 (austenite-ferrite type)
Duplex 2205 pipe is a duplex stainless steel pipe composed of 21% chromium, 2.5% molybdenum and 4.5% nickel-nitrogen alloy. It has high strength, good impact toughness, and good overall and local resistance to stress corrosion.
2205 duplex stainless steel is a duplex stainless steel composed of 22% chromium, 3% molybdenum and 5-6% nickel nitrogen. Compared with austenitic stainless steel pipe, 2205 steel pipe has better performance in pitting and crevice corrosion resistance.
Machinability
On high-speed machines, the feed rate and cutting speed of 2205 pipes are the same as 316L. If a carbonized knife is used, the cutting speed is reduced by about 20% compared to 316L, and the performance of the machine and its components plays a key role here.
Welding of duplex 2205 pipe
Duplex 2205 pipe has good weldability. Its welding is not difficult, but its welding procedure needs to be designed so that after welding, it can maintain a good phase balance and avoid the precipitation of harmful metal or non-metal phases. Can be welded in: GTAW (TIG); GMAW (MIG); SMAW (“stick” electrode); SAW; FCW; and PAW
Standards
ASTM / ASME ……….. A240 UNS S32205 / S31803
EURONORM ……….. 1.4462 X2CrNiMoN 22.5.3
AFNOR ………………. Z3 CrNi 22.05 AZ
DIN ……… W. Nr 1.4462
Applications
· Pressure vessels, high-pressure storage tanks, high-pressure pipes, heat exchangers (chemical processing industry).
· Oil and gas pipelines, heat exchanger pipes.
· Sewage treatment systems.
· Classifiers, bleaching equipment, storage and processing systems for the pulp and paper industry.
· Rotary shafts, press rolls, blades, impellers, etc. in high-strength, corrosion-resistant environments
· Cargo boxes for ships or trucks
· Food processing equipment
