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09-19-2013, 08:44 PM. (Not Otherwise Specified): used as the last qualifier in the definition of a class or category, as a punctuation period that restricts further narrowing of that specification, such as in the UN number for the transportation of dangerous goods; e.g., UN1956 is defined as "Compressed Gas, N.O.S."; whether it is flammable or ...
The obvious reason is amortization of the cost over time. Once that's done, your jug ain't costing you! If I was running through multiple bottles per week, I'd probably lease. Most high-volume operations get delivery service. I can't go through enough of anything to get it delivered - welding gas, beer, nothin'! Hank.
Nitrogen dioxide and nitric oxide are examples of nitrogen gases that are formed when you weld with high amperage and high temperatures. Nitrous gases are formed by a reaction in the air between nitrogen and oxygen and are very dangerous to inhale in large concentrations, e.g. when welding in confined, poorly ventilated areas.
After the discovery of the electric arc in 1800 by Humphry Davy, arc welding developed slowly. C. L. Coffin had the idea of welding in an inert gas atmosphere in 1890, but even in the early 1900s, welding non-ferrous materials like aluminum and magnesium remained difficult, because these metals reacted rapidly with the air, resulting in porous and dross-filled welds.[2]
Welding galventized metal burns off the zinc oxide which is a very deadly gas. I would not recommend doing so without the proper equipment. Kevin. Lincoln ranger 305g x2. Ln25. Miller spectrum 625. Miller 30a spoolgun. Wc115a. Lincoln 210mp.
The only shielding gases to use for mig welding aluminum are argon, helium, or a mixture of the two. Other gases such as oxygen, nitrogen, carbon dioxide, or hydrogen, even in trace amounts, in the shielding gas will cause dirty and porous welds. The only way you would add any of those other gasses would be pulse mig but for standartd mig ...
Mig welding stainless steel. 09-12-2009, 07:14 PM. Hello to all. Today I tried my first ever stainless steel welds with the Millermatic Passport. Wire used was 0,030" 308 LSI and shielding gas was 98% Argon/ 2% CO2. Layed a few beads on some scrap 304 tubing, 0,10" thick I have.
This intentional residue reduces the adverse effect on electrical conductively of traces of impurity metals. The internal oxide renders the alloy subject to hydrogen embitterment if heated in reducing atmospheres above 370C. C11000 is therefore unsuitable for gas welding and high temperature brazing.
03-23-2005, 10:37 PM. I was told tonight by my welding instructor that plasma cutting over water makes the water a hazadous material. They are putting in a plasma cutter that has to cut over water and the state requires them to put the water into a HazMat barrel to dispose of the water. It's going to cost over $400 a barrel to dispose of.
-Prepped with Aluminum oxide 200 grit flap disk After purging the gun and checking the wire feed tension, I tried my first pass. I used a 10-15 degree angle and about a 1/2" to 3/4" stickout. Accustomed to steel, I moved too darn slow and melted the crap out of the workpiece.