Bohler CN 22/9 N-IG description: GTAW rod of type W 22 9 3 NL / ER2209 designed for welding ferritic-austenitic duplex steels like 1.4462 / UNS 31803. The deposit possess, in addition to high tensile strength and toughness, also excellent resistance to stress corrosion cracking and pitting (Huey-test ASTM A 262-79 practice C). The operating temperature range is –60C up to 250C. To ensure particularly good weld metal properties care must be taken to achieve controlled dilution and thorough back purging.
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