TIG Rods and Tungsten

In TIG welding, shielding gas is necessary, usually using argon, which is running through the torch. Besides, you have an electrode that's made of tungsten, which is extremely hard steel that can stand up to high heat. And depending on the weld metal, the tungsten electrode will require a special alloy ingredient added to provide a stable arc, which helps produce an uncontaminated weld.

If that tungsten electrode weren't enough to wrap products’ head around, you'll also be welding with filler rod in your other hand. That makes three consumables that get used up and replaced periodically.

Tungsten Electrodes

In generally, the tungsten electrode used in TIG welding is not a consumable, since it's not meant to serve as filler rod. An experienced welder can make a tungsten electrode last a long time. On the contrary, a fresh may go through one seven-inch electrode every week. The electrodes are packaged in various quantities ten packs are the most popular. These come in seven or three-inch lengths, which correspond to the two standard tips available with TIG torches. The electrodes are also sold in a range of diameters, just like stick welding.

Tungsten electrode has many types. In order to distinguish one from another, a color code has been developed.

For example, pure tungsten electrode (EWP) is used primarily for AC welding of aluminum and magnesium at low currents. The tip of it must be balled before using. (ISO = W)

1.5% Lanthanated tungsten electrode (EWla-1.5) is a general purpose electrode used for steel and stainless steel at a wide range of currents. It often replaces thoriated tungsten electrode. (ISO = WL15)

2% ceriated tungsten electrode (EWTh-2) can achieve high currents with good arc stability, which is another substitute for thoriated tungsten electrode. (ISO = WC20)

2% thoriated electrode (EWTh-2) is an expensive and radioactive electrode. Use care in grinding (i.e. wear a dust mask), keep your skin covered and avoid contact with the metal when it's heated. (ISO = WT20)

2% zirconiated tungsten electrode (EWZr-2) is usually used in AC welding. It is preferred in situations where resistance to contamination is paramount. The tip of the tungsten is balled before using. (ISO = WZ3)

TIG Filler Rods

Filler rods for TIG welding are taken by a second hand as the first holds the tungsten torch. These rods typically come in 3-foot lengths and are packed in 10 or 50-pound boxes (or tubes). A welder's choice of diameter ranges from 1/16" to 1/4". Since the composition of the filler rod is the same as MIG, the same products are sold for TIG welding, under the category "TIG cut lengths.

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