Rutile all-positional electrode for 22%Cr duplex. MMA electrode made on duplex stainless steel core wire with a rutile flux system designed to give minimum carbon content coupled with optimum operating characteristics. The electrode has a rutile flux system optimised for all welding positions except vertical down and provides excellent operability. Recovery is about 120% with respect to core wire, 65% with respect to whole electrode.
Applications
Duplex stainless steel pipe, plate, fittings and forgings have an approximate 50:50 microstructure of austenite with a ferrite matrix. This, coupled with general alloying level, confers:
- High strength compared with standard austenitic steels, e.g. type 316L
- Good general corrosion resistance in a range of environments
- High resistance to chloride-induced stress corrosion cracking (CSCC)
- High resistance to pitting attack in chloride environments, e.g. seawater. These alloys are finding widening application in the offshore oil/gas, chemical and petrochemical process industries, e.g. pipework systems, flowlines, risers, manifolds etc
Specification
AWS A5.4: E2209-16
BS EN 1600: E 22 9 3 N L B 3 2