Like when you were learning to use a computer and the instructor showed you 8 different ways to save a file? Even though you only ever use 1 or 2 of them, those other 6 ways are looming there just to confuse and distract you. There are so many different kinds and sizes, you have to ask why? Especially since it only takes 1 or 2 kinds to get the job done. I understand that there are all kinds of gas tungsten arc welding jobs going on in industry using orbital welders and other automated forms of gas tungsten arc welding, and everyone has developed parameters based on a certain electrodes characteristics and they are reluctant to mess with them.
I am mainly interested in using as small an electrode as possible because there are times I need to make a really small weld or a weld on an thin edge And sousing an electrode that has good a good amperage rating is probably more important to me that most of the other characteristics like whether it balls up nicely on AC.
But as far as their ability to carry amperage, they suck. So that pretty much disqualifies pure tungsten for me. It balls ok, but there is not enough benefit to offset the lack of current carrying ability. Both are rated higher than all the others for amperage carrying. That makes my life a little simpler.
So why push the envelope and see which ones actually hold up at amps …even if it was for a little more than one inch of weld. To start, we sharpened all the tungsten to a point using a CK turbosharp tungsten electrode sharpener.
Then we welded for about an inch and quarter with each at amps using a miller dynasty dx set at hz and 65 percent electrode negative on the ac balance. Once the arc was struck, it was full pedal amps. Guess what? Kind of surprised me too. Now here is the thing…all of these different types of tungsten electrodes could be used at a lower amperage and on different machines and weld just fine.
And all of them would probably weld pretty ok on a syncrowave if you took the time to prepare the electrode by slightly rounding it on DCEP. But inverters are quirky. They start at much lower amperages than the older style transformer machines. And besides one of the benefits to using a tig inverter is the ability to use a tapered electrode on AC for welding aluminum.
So if its safer, why not? You cant break the lanthanated …. Subscribe To This Site. GTAW Tungsten Electrodes - thoriated vs ceriated vs lanthanated vs pure vs zirconiated Ever get the feeling that something is unnecessarily complicated?
To me, tungsten electrodes are kind of like that. Why not the others? Here is why… I am mainly interested in using as small an electrode as possible because there are times I need to make a really small weld or a weld on an thin edge Then we take a look at the previously sharp tips to see what happened.
Here is the run down on the rest. One drawback to be aware of…. Copyright WeldingTipsandTricks.Tungstenor wolfram  is a chemical element with the symbol W and atomic number The name tungsten comes from the former Swedish name for the tungstate mineral scheelitetungsten which means "heavy stone".
It was identified as a new element in and first isolated as a metal in Its important ores include wolframite and scheelite.
However, pure single-crystalline tungsten is more ductile and can be cut with a hard-steel hacksaw. Tungsten's many alloys have numerous applications, including incandescent light bulb filaments, X-ray tubes as both the filament and targetelectrodes in gas tungsten arc weldingsuperalloysand radiation shielding.
Tungsten's hardness and high density give it military applications in penetrating projectiles. Tungsten compounds are also often used as industrial catalysts. Tungsten is the only metal from the third transition series that is known to occur in biomolecules that are found in a few species of bacteria and archaea. It is the heaviest element known to be essential to any living organism. In its raw form, tungsten is a hard steel-grey metal that is often brittle and hard to work.
If made very pure, tungsten retains its hardness which exceeds that of many steelsand becomes malleable enough that it can be worked easily. Tungsten has the lowest coefficient of thermal expansion of any pure metal.
The low thermal expansion and high melting point and tensile strength of tungsten originate from strong covalent bonds formed between tungsten atoms by the 5d electrons.
The former has a body-centered cubic structure and is the more stable form. Naturally occurring tungsten consists of four stable isotopes W, W, W, and W and one very long-lived radioisotope, W.
Theoretically, all five can decay into isotopes of element 72 hafnium by alpha emissionbut only W has been observed to do so, with a half-life of 1. Another 30 artificial radioisotopes of tungsten have been characterized, the most stable of which are W with a half-life of Elemental tungsten resists attack by oxygenacidsand alkalis. Tungsten carbides W 2 C and WC are produced by heating powdered tungsten with carbon.
W 2 C is resistant to chemical attack, although it reacts strongly with chlorine to form tungsten hexachloride WCl 6. In aqueous solution, tungstate gives the heteropoly acids and polyoxometalate anions under neutral and acidic conditions.
As tungstate is progressively treated with acid, it first yields the soluble, metastable "paratungstate A" anionW 7 O 6— 24which over time converts to the less soluble "paratungstate B" anion, H 2 W 12 O 10— The metatungstate ion exists as a symmetric cluster of twelve tungsten- oxygen octahedra known as the Keggin anion.
Many other polyoxometalate anions exist as metastable species. The inclusion of a different atom such as phosphorus in place of the two central hydrogens in metatungstate produces a wide variety of heteropoly acids, such as phosphotungstic acid H 3 PW 12 O Tungsten trioxide can form intercalation compounds with alkali metals.Login or Sign Up.
Logging in Remember me. Log in. Forgot password or user name? Posts Latest Activity. Page of 1. Filtered by:. Previous template Next. How does one determine the appropriate size tungsten for a given material thickness? Is it as simple as any tungsten that will carry enough current to adequatly weld the material in question? Tags: None. Diamond ground can send you some samples with a 20 degree taper and a. This should do everything from 30 amps up to amps and maybe higher.
Use a 35 degree taper and a. This thicker taper and wider flat will handle the current better. Let me tell about current capacity with lanthanated tungsten and the Dynasty inverters.
I weld aluminum, stainless, and titanium. I occasionally work with mild steel, but not often. Anyway, I use this tungsten for everything from 30 amps to amps. I do use the 35 degree taper and a. I have the Diamond Ground Piranha II tungsten sharpener which makes it easy to adjust taper and end flat in a flash!
You can also do it with a bench grinder by hand and eye. I did it for many years that way. A plain jane aluminum oxide wheel works wonders. Do dedicate a wheel to tungsten only. I hope this helps. I have used. Let me know if I missed something. By the way Diamond Ground is a great company!!!
If I can help you with anything else, let me know. Comment Post Cancel.
That's pretty good advice from Hawk, but my methods differ a little bit. This was done using 4 amps, pulsing to keep things cooler. I typically don't bother to put a flat on the tungsten unless I want to make very sure that the tip doesn't break off and go into the weld not good in an xray situation.Selecting the correct tungsten electrode is important to getting high-quality welds and making your welding easier.
Some important factors to be considered in making the right choice are type of power source Inverter or transformermaterial to be welded steel, aluminum, or stainless steeland the thickness of the material.
We offer the following premium quality tungsten, ground to a high quality finish. All tungsten is 7" long. A drawback is that this tungsten has a low level radiation hazard. Popular for thinner materials because it requires less amperage to start. Offers a stable arc and can be used for both AC and DC welding with inverter power sources.
It can be used for both AC and DC welding with both inverter and transformer power sources.
Can be used for both AC and DC welding with both inverter and transformer power sources. This tungsten works well on AC and DC processes, transformer and inverter machines.
The electrode life is extended, keeps a sharpened point and non-radioactive. Join our email list. Built with Volusion. Owners Manuals.
GTAW Tungsten Electrodes - thoriated vs ceriated vs lanthanated vs pure vs zirconiated
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ShoutChat Box. Key: AdminGlobal ModMod. Print Thread. Rate Thread. Joined: Mar A particular timer lists it's various ratings. It says it can handle a resistive load of 1, watts, but only 1, watts of a tungsten load. I thought incandescent lamp filaments were made of tungsten. Does this mean it can handle an 1, watt wall heater, but only 1, watts of incandescent lighting?
Joined: Jan Blue Collar Country. They're referring to HID lighting Regina, Sask. Originally Posted by BigB.
Joined: Jul SI,New Zealand. This sounds a tad strange, Are you sure you aren't getting the inductive rating of the contacts of the the timer, mixed up with an incandescent rating? Inductive circuits need higher rated contacts, because of the in-rush current and breaking current, or de-rating needs to take place.
Even though the specs say it has 20 amp contacts it is not rated to switch a 20 amp load. Apparently over-promising and under-delivering. Sign up to join this community. The best answers are voted up and rise to the top. Home Questions Tags Users Unanswered. Is tungsten wattage different from regular wattage?
Ask Question. Asked 3 years, 11 months ago. Active 1 year, 11 months ago. Viewed 5k times. What is the make and model of the device you're referring to? Active Oldest Votes. B Action. SDsolar 1, 1 1 gold badge 10 10 silver badges 21 21 bronze badges. Nas Banov Nas Banov 2 2 bronze badges.
Different devices have different characteristics when the timer breaks the circuit. Good luck! BenWelborn Hmm not quite. Tungsten is the element used for standard lighting filaments so it is a resistive load.
So, the would be for resistive lighting. The timer is also rated for 1 HP or watts of inductive load so you were right on with the motor comment. It is possible to switch fluorescent or LED lighting at a higher rating but I certainly wouldn't try to push the total of 20 amps.Tungsten is a rare metallic element used for manufacturing gas tungsten arc welding GTAW electrodes.
The GTAW process relies on tungsten's hardness and high-temperature resistance to carry the welding current to the arc. Tungsten has the highest melting point of any metal, 3, degrees Celsius. These nonconsumable electrodes come in a variety of sizes and lengths and are composed of either pure tungsten or an alloy of tungsten and other rare-earth elements and oxides. Which one of three end preparations you choose, balled, pointed, or truncated, also is crucial in optimizing the results and preventing contamination and rework.
Each electrode is color-coded to eliminate confusion over its type. The color appears at the tip of the electrode.
These electrodes form a clean, balled tip when heated and provide great arc stability for AC welding with a balanced wave. Pure tungsten also provides good arc stability for AC sine wave welding, especially on aluminum and magnesium.
It is not typically used for DC welding because it does not provide the strong arc starts associated with thoriated or ceriated electrodes. They are the most commonly used electrodes today and are preferred for their longevity and ease of use.
Thorium increases the electron emission qualities of the electrode, which improves arc starts and allows for a higher current-carrying capacity. This electrode operates far below its melting temperature, which results in a considerably lower rate of consumption and eliminates arc wandering for greater stability. Compared with other electrodes, thoriated electrodes deposit less tungsten into the weld puddle, so they cause less weld contamination.
These electrodes are used mainly for specialty AC welding such as thin-gauge aluminum and material less than 0. During manufacturing, thorium is evenly dispersed throughout the electrode, which helps the tungsten maintain its sharpened edge—the ideal electrode shape for welding thin steel—after grinding. These electrodes perform best in DC welding at low current settings but can be used proficiently in AC processes.
With its excellent arc starts at low amperages, ceriated tungsten has become popular in such applications as orbital tube and pipe fabricating, thin sheet metal work, and jobs involving small and delicate parts. Like thorium, it is best used to weld carbon steel, stainless steel, nickel alloys, and titanium, and in some cases it can replace 2 percent thoriated electrodes.
Ceriated tungsten has slightly different electrical characteristics than thorium, but most welders can't tell the difference.
Using ceriated electrodes at higher amperages is not recommended because higher amperages cause the oxides to migrate quickly to the heat at the tip, removing the oxide content and nullifying its process benefits. These electrodes have excellent arc starting, a low. Lanthanated electrodes also share the conductivity characteristics of 2 percent thoriated tungsten. In some cases, 1. Lanthanated tungsten electrodes are ideal if you want to optimize your welding capabilities.
They work well on AC or DC electrode negative with a pointed end, or they can be balled for use with AC sine wave power sources.
Lanthanated tungsten maintains a sharpened point well, which is an advantage for welding steel and stainless steel on DC or AC from square wave power sources. Unlike thoriated tungsten, these electrodes are suitable for AC welding and, like ceriated electrodes, allow the arc to be started and maintained at lower voltages.
Compared with pure tungsten, the addition of 1.