why is oxygen gas helpful in welding of metels
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it is because welding need high flame and without enough oxygen the burning of high flame won't be possible
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Oxygen is used in small amounts as an addition to other gases; typically as 2–5% addition to argon. It enhances arc stability and reduces the surface tension of the molten metal, increasing wetting of the solid metal. It is used for spray transfer welding of mild carbon steels, low alloy and stainless steels..
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