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What are the best methods for welding metal? That’s like asking whats the ultimate way to go fishing? This will depend over a many solutions, right? Many things like which stainless, what thickness, whats the application, as well as what industry?

1. Food Service. Most metal inside the food service marketplace is 300 series stainless. Type 304 .063" thick stainless sheet metal to become exact. Should you go to any Junk food counter and check out every one of the counters, shelving, cookers etc, you will learn it’s all made from welded stainless steel sheet metal. Food service codes require 304 stainless-steel to get used in food preparation areas because it won’t rust easily. All welds should be performed in such a way to not trap bacteria and also other crud. Back sides of metal welds ought to be shielded with argon in order that they usually are not sugared and filled with pits that could trap bacteria like salmonella. All wire brushing ought to be done which has a stainless steel brush and welds that are not perfectly smooth should be blended smooth by incorporating kind of abrasive wheel and after that cleaned with alcohol.

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

Carbon is detrimental in relation to corrosion resistance in stainless.

Methods for welding SS sheet metal : 1 amp per 1 a huge number of thickness, maintain the hot tip of the filler rod shielded and snip it when it gets oxidized, use chill bars created from aluminum, copper, or bronze whenever feasible. Filler rod should generally not be larger than thickness of metal welded. Keep bead width to 4x the thickness from 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 alloys found in the aerospace and aviation industries really are a bit more 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 family of stainless used on commercial aircraft will be the Precipitation Hardening variety. A PH at the end like 15-5ph, 17-4ph, 15-7ph, 17-7ph suggests that the steel is precipitation hardening. Which means holding it at hot temperature longer time enables the steel to harden. PH grades are now and again much more tough to weld than the straight 300 series as a result of alloy elements and sophisticated metallurgical reactions to heat while welding.

Tig Welding and automatic plasma welding are the most commonly utilized processes.

Strategies for Aerospace tig welding SS : Clean, Clean, Clean. Use as big a tig cup and possible 3/4 " –1". Use minimal heat and make use of any ways to prevent distortion (skip welding, fixturing, small beads) shield a corner side of everything you weld with argon using tooling, or hand made purge boxes.

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