What are best methods for welding metal? That's like asking whats the ultimate way to go fishing? The treatment depends on the many things, right? Many things like which kind of stainless, what thickness, whats the application form, and then for what industry?

1. Food Service. Most stainless from the food service market is 300 series stainless. Type 304 .063" thick stainless sheet metal being exact. In case you check out any Fast food counter and look for all of the counters, shelving, cookers etc, you will observe to make sure made from welded stainless sheet metal. Food service codes require 304 metal to be employed in preparing food areas since it doesn't rust easily. All welds should be performed in such a way never to trap bacteria as well as other crud. Back sides of metal welds ought to be shielded with argon so that they are not sugared and packed with pits that could trap bacteria like salmonella. All wire brushing carried out which has a metal brush and welds which are not perfectly smooth should be blended smooth with many kind of abrasive wheel and then cleaned with alcohol.

Tig welding is actually always the top 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 isn't good in terms of corrosion resistance in stainless.

Tricks for welding SS sheet metal : 1 amp per 1 1000s of thickness, keep your hot tip with the filler rod shielded and snip it whether or not this gets oxidized, use chill bars created from aluminum, copper, or bronze whenever possible. Filler rod should generally stop bigger than thickness of metal welded. Keep bead width to a number exceeding 4 times the thickness from the sheet. Utilize 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 and also sharp.

2. Aerospace. Stainless steel alloys employed 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 might be martensitic stainless grades like 410 steel , Greek Ascoloy, and Jethete M190. Another family 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 hot temperature for longer time enables the steel to harden. PH grades are often far more challenging to weld as opposed to straight 300 series due to alloy elements and complicated metallurgical reactions to heat while welding.

Tig Welding and automated plasma welding are 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 rehearse any way to prevent distortion (skip welding, fixturing, small beads) shield a corner side of the things you weld with argon using tooling, or hand made purge boxes.

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