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What are the best processes for welding stainless-steel? That’s like asking whats the simplest way to go fishing? It all depends over a many solutions, don’t you think? Lots of things like which kind of stainless, what thickness, whats the approval, as well as for what industry?

1. Food Service. Most metal in the food service industry is 300 series stainless. Type 304 .063" thick stainless sheet metal to be exact. In case you go to any Junk food counter to check out each of the counters, shelving, cookers etc, you will see it is all created from welded stainless-steel sheet metal. Food service codes require 304 stainless used in cooking food areas given it doesn’t rust easily. All welds should be performed in a way to not trap bacteria and also other crud. Back sides of stainless steel welds ought to be shielded with argon so that they usually are not sugared and filled with pits that can trap bacteria like salmonella. All wire brushing carried out using a stainless steel brush and welds that aren’t perfectly smooth must be blended smooth by incorporating sort of abrasive wheel and then cleaned with alcohol.

Tig welding is almost always the very best process since spatter and slag are absent. Tig welding rods must be 308L for welding 304 stainless. L is perfect for low carbon because

Carbon is bad in terms of corrosion resistance in stainless.

Tips for welding SS sheet metal : 1 amp per 1 thousands of thickness, maintain your hot tip in the filler rod shielded and snip it whether or not this gets oxidized, use chill bars manufactured from aluminum, copper, or bronze whenever feasible. Filler rod should generally not be larger than thickness of metal welded. Keep bead width close to 4 times the thickness of the sheet. Work with a gas lens style cup, a #7 or bigger. A 1/16 thoriated or lanthanated electrode will easily weld 16 ga .063" sheet. Keep electrodes as well as sharp.

2. Aerospace. Stainless steel alloys found in the aerospace and aviation industries certainly are a bit more varied. There are several them. Austenitic stainless steels like 321, 347, 316, and 304 are typical, but so may be martensitic stainless grades like 410 steel , Greek Ascoloy, and Jethete M190. Another group of stainless utilized on commercial aircraft may be the Precipitation Hardening variety. A PH at the end like 15-5ph, 17-4ph, 15-7ph, 17-7ph points too the steel is precipitation hardening. This means holding it at warm for extended time enables the steel to harden. PH grades are now and again a lot more hard to weld compared to straight 300 series because of alloy elements and complicated metallurgical reactions to heat while welding.

Tig Welding and automated plasma welding would be the mostly utilized processes.

Methods for Aerospace tig welding SS : Clean, Clean, Clean. Use as big a tig cup and possible 3/4 " –1". Use minimal heat and use any way to prevent distortion (skip welding, fixturing, small beads) shield the rear side of all things you weld with argon using tooling, or homemade purge boxes.

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