EPIC Aadhaar Seeding - How to Seeding the EPIC With Aadhaar - Duration: 4:52. SAMPATH K 6,600 views
In some instances, consider adding helium to the shielding gas mixture for its ability to provide a hotter, more penetrating arc on thicker sections. For the GMAW process, a mixture of 75 percent helium balanced with 25 percent argon is a good option.inally, consider purchasing low-dew-point shielding gases as protection against porosity. Follow all recommended welding procedures for shielding gas flow rates and purge cycles. As with any welding process on any material, following some basic guidelines is critical to obtaining the best results.
While Ar, He and CO2 may be used by themselves (i.e. 100%) for certain applications, in other cases the four gases are mixed together in different combinations to form shielding gas blends. These blends are expressed as a percentage (e.g. 75% Ar / 25% CO2 or 75Ar/25CO2).ther gases (e.g. hydrogen) and many other gas mixes of different percentages and combination of gases are also used in the welding industry. Table 1 is simply meant to be a quick summary of the most common gases used for common types of base materials in the U.S, welding market.