How Do You Tig Weld 4140?
Tungsten inert gas (TIG) welding uses a tungsten electrode that is not consumed during the welding process. A shielding gas protects the weld area from contaminants in the air while the weld is being created. TIG welding steel will normally require a filler to join the two work pieces and a direct current (DC) power supply. The specific type of steel that is being welded primarily affects the setup. The welding process of 4140 steel is very similar to that of other types of steel. Step 1 Identify 4140 steel. This number indicates the alloying agents in the steel. The first digit indicates the primary alloying agent, with a “4” referring to molybdenum. The second digit indicates the second alloying agent, with a “1” referring to chromium. The third and fourth digits indicate the carbon content in hundredths of a percent. Therefore, 4140 steel is a chromium-molybdenum alloy with a carbon content of 0.4 percent. Step 2 Select the electrode. The electrode may be pure tungsten for lighter m
