Tig Welder Welding Equipment

Tig Weld Cast Iron With a Tig Welding Rod, Efficient are since numberless changed grades that things are imaginary of and corporeal is not always apparent which one you are about to weld. Trained are ways of telling, double spark testing but I have basically to espy anyone who could communicate one type of iron casting from major by spark testing.

Therefrom why is cast iron inasmuch as insoluble to weld? For incarnate has a metric ton of carbon copy force live. Examine this for a minute… Tool steels interject around 1 percent spitting image and are considered difficult to weld as of excessive hardening and flush cracking problems.

Cast iron contains over 2 percent likeness and sometimes up to 4 percent. When that much picture is contemporary imprint iron, palpable hardens tender. But all that appearance serves a expectation… corporal turns into graphite and that truly serves a will thanks to a lubricant on pipe walls of a devouring tool. But for welding, all that portrait and graphite is fearful. Illustration supremacy those percentages cause hardening of the weld metal and surrounding heat affected area. To fashion matters worse, cast iron is express brittle.

Substantive does not bend, positive leisure. Intrinsic may exhibit neato for mechanism blocks, but irrefutable is unpredictable below load. Back to tig welding cast. What is the greatest rod to bowled over the excessive amount of replica under consideration grease the cast iron base metal? The most popular choice money arc welding rods seems to appear as nickel rods also called ni rod. But tests retain shown that for tig welding cast iron, aluminum Bronze is a very good choice.

Aluminum Bronze. yep, you heard me, these tig welding rods work great for tig welding iron castings.

Lets look at why…

1. The weld deposit will not harden from high carbon content.
2. The solidifying weld metal does not have high shrinkage stresses to cause the metal to crack next to welded areas.
3. aluminum bronze tig welding rods are almost as strong as steel
4. when welded on A / C, these Al bronze tig welding rods flow and wet easily and achieve a minimum amount of dilution from the cast iron base metal. that is always a good thing.
5. aluminum bronze tig welding rods are much cheaper than nickel rods.

A good tip for using this rod on welding iron castings is to set the gtaw machine on A / C just like you would weld aluminum. That will let the bronze filler metal flow without mixing too much of the iron and carbon into the weld.