(A small non-industrial MIG machine uses a much smaller spool than you see in the photo below.) Obviously, the wire feed mechanism on the welding machine will dictate which option is chosen. In making a MIG wire purchase, your last decision involves the quantity of wire and how it’s housed.įor instance, Lincoln Electric offers ER70S-6 as a 44-pound spool or a 1,000-pound drum.
Get the high-quality printable version here Wire Quantity The most common sizes for welding on sheet metal are 0.35 and 0.45. The first is the wire diameter, which is usually given in thousands of an inch. Once a wire type is determined for your welding equipment, two additional pieces of information are needed in order to purchase this consumable. The L stands for low carbon, which provides extra corrosion resistance. Stainless steel MIG wire includes designations like ER308, ER316, and ER308–L. The most commonly used aluminum MIG wires are ER5056, a soft wire with good ductility, and ER5356, which is harder and has high tensile strength. This one doesn’t have the added chemicals, so is used primarily on new or clean steel. The other general-purpose carbon steel wire type is ER70S-3. The 6, in this case, indicates more deoxidizers have been added to the wire, which is helpful when welding on dirty or rusty steel.
#FLUX CORE WELDING WIRE CODE#
The AWS code for solid steel wire is known as AWS A5.18. The American Society of Mechanical Engineers also has a code, but it’s nearly identical. Like stick electrodes, there’s a classification system for the different choices of MIG wire available that’s managed by the American Welding Society. There are two consumables to consider in the GMAW process – the gas and the wire. However, since CO2 and O2 are reactive gases, it’s more accurate to say MAG – metal active gas – when these gases are used.) Wire Classification (The term MIG, incidentally, stands for “metal inert gas”. And since the spool holds about a mile’s worth of wire, you don’t have to stop and reload very often. Welding out of position is a lot easier than with SMAW. This allows for pinpoint accuracy and an unobstructed view of what’s happening inside the joint. When a welder pulls the trigger on his MIG gun (shown below), a wire feed machine advances the wire out through a brass nozzle. Nowadays, it is the most common process for structural welding and product fabrication. In this welding process, more popularly known as MIG, a gas tank (typically CO2 or argon) provides the shielding while the wire melts into the base metal.
Instead, everything you need to deposit a weld comes from a spool of metal wire. In Gas Metal Arc Welding (GMAW), you won’t be using a stick electrode or a filler rod.
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