Duplex 2205 Exotic Alloy Pipe, Flanges, Fittings

Duplex 2205 pipe, valves,  fittings, and fasteners are a chromium molybdenum blend that has a high resistance to corrosion and erosion. Applications include but are not limited to: oil and gas, desalination plants, and industries handling chlorides.

MSI Product Availability

MSI Supply can generally provide the items listed below for a one to three day delivery.  Large quantites may be subject to a longer lead time for delivery.  MSI can also provide many sizes outside these ranges, however, they too may be susceptible to longer lead times.

Please note that the availability of USA vs import manufacturers may vary.

Commodity Size Rating ASTM Specification
Welded Pipe 4"-24" 10s, 20s, 40s, 80s, 160 ASTM 790
Smls Pipe ½"-8" 10s, 40s, 80s, 160, XXH ASTM 790
B/W Fittings ½"-24" 10s, 40s, 80s, 160 ASTM 815
Flanges ½"-24" 150#, 300# ASTM F51, F60
Pressure Fittings ½"-2" 3000# ASTM F51, F60



  • UNS S31803/S32205
MSI offers a large selection of Duplex 2205 pipe, valves,  fittings, and fasteners seamless pipewelded pipebuttweld fittingsforged steel fittingsflanges, and tubing.
Grade   C Mn Si P S Cr Mo Ni N
2205 (S31803) Min - - - - - 21 2.5 4.5 0.08
Max 0.03 2 1 0.03 0.02 23 3.5 6.5 0.2