Argon gas is colorless, odorless and chemically inert. It is used as shielding gas in welding, detecting gas ... ≥99.5GB-T3863-1995bottle/cylinder Steel cutting, welding, flame processingnitrogen≥99.5GB-T3864-1996bottle/cylinderReplacement gas ... industry, chemical industry, analysis Pure argon ≥99.99 GB/T4842-95Bottle Welding shielded welding, stainless steel smelting, container, ...