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Metals/use of gas

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Question
QUESTION: Can i use co2 gas during ss welding?

ANSWER: No, Nickel can vaporize partially as oxygen is depleted. Try Argon instead.  Doctor Poe

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QUESTION: Wich shielding gas  can i use during ss welding with mig.

Answer
90% He, 7-1/2% Argon, 2-1/2% CO2.  CO2 alone will cause a weak weld and some nickel will vaporize as nickel carbonyl.  You asked for the best? This is it.  Keep the welder on DC with the electrode feed as positive.  CO2 is cheap and works great for most steels but not stainless steel.  --- Doctor Poe

Metals

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Christopher Poe

Expertise

The processing/refining of precious metals including chalcogenic ores like tellurides and selenides.

Experience

32 years experience in ore assaying and refining. Presently head chemist and chief refiner of a Philippine metals company.

Publications
Gold Refining Forum

Education/Credentials
Doctor of Geochemical Research

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