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Stainless Steel is classified with a 300 code designation. Poorest grade is 302. Highest grade 347. Each grade contains a certain amount of Chromium and Nickel plus other elements. 308L (L means low carbon content) should be used for stainless with a 308 designation or below. It is recommended that you use the same electrode as the metal to be welded. Stainless to carbon steel usually requires a 309 electrode. L or ELC (Extra Low Carbon) is a plus. Food grade is usually type 316 . Use 316 on it.

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