What are best methods for welding stainless steel? That's like asking whats the simplest way to go fishing? This will depend over a many things, doesn't it? Many things like which stainless, what thickness, whats the application form, and for what industry?
1. Food Service. Most metal from the food service market is 300 series stainless. Type 304 .063" thick stainless sheet metal to get exact. Should you check out any Take out counter and check out each of the counters, shelving, cookers etc, you will learn to make sure made from welded stainless-steel sheet metal. Food service codes require 304 stainless to get used in cooking areas given it doesn't rust easily. All welds should be performed in such a way never to trap bacteria and also other crud. Back sides of stainless-steel welds should be shielded with argon so they are not sugared and brimming with pits that can trap bacteria like salmonella. All wire brushing carried out having a stainless brush and welds that are not perfectly smooth ought to be blended smooth by incorporating kind of abrasive wheel after which cleaned with alcohol.
Tig welding is actually always the very best process since spatter and slag are absent. Tig welding rods needs to be 308L for welding 304 stainless. L is made for low carbon because
Carbon is not good in terms of corrosion resistance in stainless.
Strategies for welding SS sheet metal : 1 amp per 1 a large number of thickness, maintain your hot tip of the filler rod shielded and snip it whether it gets oxidized, use chill bars created from aluminum, copper, or bronze whenever possible. Filler rod should generally 't be bigger thickness of metal welded. Keep bead width to around Four times the thickness of the sheet. Make use of 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 utilized in the aerospace and aviation industries really are a much more varied. There are various them. Austenitic stainless steels like 321, 347, 316, and 304 are routine, but so can be martensitic stainless grades like 410 steel , Greek Ascoloy, and Jethete M190. Another class of stainless used 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. Which means holding it at temperature for extended time allows the steel to harden. PH grades are now and again much more challenging to weld compared to the straight 300 series because of alloy elements and complicated metallurgical reactions to heat while welding.
Tig Welding and automatic plasma welding include 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 means to prevent distortion (skip welding, fixturing, small beads) shield the back side of all things you weld with argon using tooling, or home made purge boxes.
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