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Make sure you check the manufacturer’s recommendations for the proper size.Įlectrode geometry – A taper of no more than 2.5 times the electrode diameter creates a focused arc capable of producing deep, thin beads, and a narrow heat-affected zone. Selecting the right size depends on variables such as polarity, amperage, joint size, and base metal thickness.
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To ensure the integrity of the weld, the filler metal and base material should be chemically compatible and possess similar mechanical properties.Įlectrode size – Common tungsten electrode sizes range from 3/32 to 1-1/4 of an inch. Therefore, the diameter of the filler metal should be thinner than the base metal. You can’t add filler metal without adding heat, so you don’t want to find yourself filling gaps.įiller metal – The thicker the rod or wire the more heat is required to melt it. Proper fit up – Proper fit up ensures that only the required amount of filler metal is used. Fortunately for us, there are a series of tried and true tips that all of us can use to control heat input and master the art of TIG welding on stainless steel. In fact, as little as five amps can make the difference between the perfect weld and a blued or burnt-through part. Welding stainless steel can be tricky because it is very good at retaining heat, and this can lead to problems such as warping, embrittlement, and rust. Since then, he has used the Gas Tungsten Arc Welding (GTAW/AKA TIG) process to produce an impressive collection of eagles, dragons, dinosaurs, and more. Kevin Stone is a senior fabricator who began applying his welding and drawing skills to the creation of massive stainless steel sculptures back in 2005.
TIG WELDING TECHNICS MANUAL HOW TO