MIG wire can also be ordered in “TIG cut lengths”. (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.
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