Focusing on High-Purity Gases for Atlanta, GA Laser Welding


Lasers were originally proposed by none other than Albert Einstein in the early days of the 20th century. It wasn’t until the 1980s, though, that lasers were applied to solder lead in electronic component circuit boards. And it wasn’t until 2002 that CO2 lasers were used to weld polymers. These days, Sidney Lee Medical & Scientific Gases, one of over 150 PurityPlus® Partners at 600 locations coast to coast, is happy to be a trusted Atlanta, GA supplier of the high-purity specialty gases so important to the gas laser welding process. Our main customers are heavily automated high-volume manufacturers. Those involved in the automotive industry are likely the most recognizable examples of such.

A smidgen of gas laser fundamentals:

  • Resonator gases are commonly a combination of helium (He), carbon dioxide (CO2), and nitrogen (N2). The active gas that actually generates the laser light itself – infrared radiation – is CO2.
  • Shielding gases keep the weld area free of oxygen and water vapor, which helps hike the speed and quality of the welding process. Argon is the more traditional shielding gas. It’s often mixed with helium, oxygen, or carbon dioxide, which considerably improves its plasma suppression properties.
  • As a resonator gas, ultra-high-purity (99.999%) PurityPlus® helium provides remarkably high thermal conductivity, the better to conduct heat away from the electric discharge. This makes it amore than suitable choice for very high-powered laser welding.
  • PurityPlus® carbon dioxide, while often used on its own to operate CO2 lasers, is better combined with helium and nitrogen so as to realize the very high laser powers needed for laser cutting and welding.
  • PurityPlus® nitrogen, especially as an intermediary with CO2, is also advantageous to securing very high laser powers.
  • PurityPlus® argon, an inert gas and thus fantastic as a shielding gas in laser welding, provides complete protection against ambient air. Because it usually aids in plasma generation, it should not be used for laser powers above 3 kW.

Regardless of your singular laser welding application here in Atlanta, GA, you can be sure we offer the PurityPlus® specialty gases with the certified high- or ultra-high purity necessary to carry it out. Contact Sidney Lee Medical & Scientific Gases today.