The utilization of Welding Stainless Steel
Do you know the best approaches for welding stainless steel? That's like asking whats the ultimate way to go fishing? This will depend on the many solutions, don't you think? Lots of things like which kind of 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 get exact. Should you go to any Fastfood counter to see all the counters, shelving, cookers and the like, you will see it is all made from welded stainless steel sheet metal. Food service codes require 304 stainless to get used in cooking areas because it won't rust easily. All welds are supposed to be performed so to not trap bacteria along with other crud. Back sides of metal welds should be shielded with argon in order that they usually are not sugared and packed with pits which could trap bacteria like salmonella. All wire brushing should be done having a stainless steel brush and welds that are not perfectly smooth needs to be blended smooth with some type of abrasive wheel and after that cleaned with alcohol. 
Tig welding is almost always the top process since spatter and slag are absent. Tig welding rods must be 308L for welding 304 stainless. L is made for low carbon because
Carbon isn't good when it comes to corrosion resistance in stainless.
Methods for welding SS sheet metal : 1 amp per 1 thousands of thickness, maintain the hot tip from the filler rod shielded and snip it whether or not this gets oxidized, use chill bars made from aluminum, copper, or bronze whenever possible. Filler rod should generally 't be greater than thickness of metal welded. Keep bead width 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 as well as sharp.
2. Aerospace. Metal alloys employed in the aerospace and aviation industries really are a little more varied. There are lots of them. Austenitic stainless steels like 321, 347, 316, and 304 are routine, but so may be martensitic stainless grades like 410 steel , Greek Ascoloy, and Jethete M190. Another category of stainless used on commercial aircraft will be the Precipitation Hardening variety. A PH towards 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 for extended time enables the steel to harden. PH grades are occasionally considerably more tough to weld than the straight 300 series because of alloy elements and complex metallurgical reactions to heat while welding.
Tig Welding and automatic plasma welding would be the mostly 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 rehearse any means to prevent distortion (skip welding, fixturing, small beads) shield the rear side of everything you weld with argon using tooling, or home made purge boxes.
More info about ong thep luon day dien Smartube explore our new web site.