Do you know the best processes for welding stainless-steel? That's like asking whats the easiest method to go fishing? It depends with a lot of things, doesn't it? Lots of things like which kind of stainless, what thickness, whats the application, and for what industry?
1. Food Service. Most stainless-steel within the food service market is 300 series stainless. Type 304 .063" thick stainless sheet metal to be exact. In case you check out any Take out counter and look for each of the counters, shelving, cookers and the like, you will learn it's all made from welded stainless-steel sheet metal. Food service codes require 304 stainless-steel used in food preparation areas given it won't rust easily. All welds are supposed to be performed such to not trap bacteria along with other crud. Back sides of stainless welds ought to be shielded with argon so that they usually are not sugared and brimming with pits that can trap bacteria like salmonella. All wire brushing carried out with a stainless-steel brush and welds that aren't perfectly smooth must be blended smooth with a few form 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 made for low carbon because
Carbon is detrimental in relation to corrosion resistance in stainless.
Tricks for welding SS sheet metal : 1 amp per 1 a large number of thickness, keep the hot tip with the filler rod shielded and snip it if it gets oxidized, use chill bars made of aluminum, copper, or bronze whenever possible. Filler rod should generally not be greater than thickness of metal welded. Keep bead width to Four times the thickness from 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 clean and sharp.
2. Aerospace. Stainless-steel alloys found in the aerospace and aviation industries really are a extra varied. There are several them. Austenitic stainless steels like 321, 347, 316, and 304 are routine, but so might be martensitic stainless grades like 410 steel , Greek Ascoloy, and Jethete M190. Another group of stainless suited for 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. Which means holding it at warm for longer time allows the steel to harden. PH grades are sometimes a lot more hard to weld compared to the straight 300 series due to alloy elements and complex metallurgical reactions to heat while welding.
Tig Welding and automatic plasma welding include the normally 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 ways to prevent distortion (skip welding, fixturing, small beads) shield the back side of all things you weld with argon using tooling, or do-it-yourself purge boxes.
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