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What are the best techniques for welding metal? That’s like asking whats the easiest method to go fishing? This will depend on a many solutions, don’t you think? Lots of things like which kind of stainless, what thickness, whats the application, and then for what industry?

1. Food Service. Most stainless steel inside the food service industry is 300 series stainless. Type 304 .063" thick stainless sheet metal to become exact. Should you check out any Take out counter and check out all of the counters, shelving, cookers and so forth, you will learn it is all created from welded stainless-steel sheet metal. Food service codes require 304 metal to be employed in cooking food areas because it will not rust easily. All welds are supposed to be performed so never to trap bacteria along with other crud. Back sides of stainless-steel welds should be shielded with argon so that they aren’t sugared and filled with pits that can trap bacteria like salmonella. All wire brushing ought to be done which has a stainless-steel brush and welds which are not perfectly smooth needs to be blended smooth with many kind of abrasive wheel then cleaned with alcohol.

Tig welding is practically always the most effective process since spatter and slag are absent. Tig welding rods ought to be 308L for welding 304 stainless. L is perfect for low carbon because

Carbon isn’t good in relation to corrosion resistance in stainless.

Tips for welding SS sheet metal : 1 amp per 1 a huge number of thickness, keep the hot tip in the filler rod shielded and snip it whether or not this gets oxidized, use chill bars created from aluminum, copper, or bronze whenever you can. Filler rod should generally stop larger than thickness of metal welded. Keep bead width close to Four times the thickness with the sheet. Use 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 neat and sharp.

2. Aerospace. Stainless steel alloys utilized in the aerospace and aviation industries are a extra varied. There are various them. Austenitic stainless steels like 321, 347, 316, and 304 are normal, but so are martensitic stainless grades like 410 steel , Greek Ascoloy, and Jethete M190. Another category of stainless utilized on commercial aircraft is the Precipitation Hardening variety. A PH at the end like 15-5ph, 17-4ph, 15-7ph, 17-7ph indicates that the steel is precipitation hardening. This means holding it at temperature for longer time allows the steel to harden. PH grades are occasionally much more hard to weld than the straight 300 series because of alloy elements and complex metallurgical reactions to heat while welding.

Tig Welding and automated plasma welding will be the most commonly 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 employ any ways to prevent distortion (skip welding, fixturing, small beads) shield the back side of everything you weld with argon using tooling, or home made purge boxes.

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