50 / 52 50 terminology the shielding gas product programme will be complemented as new weldable materials and methods are developed. the shielding gases included in the table are part of agas warehouse programme. we will deliver other mixtures and specialty gases on order. material mison ® argon ® varigon ® ar he30 h2 2 2he 8 18 25 – 4.6 h5 he50 unaloyed/low alloyed