Shielding gas
90% helium / 7.5% argon / 2.5% CO₂ stainless trimix
A stainless trimix documented for specified short-circuit and controlled-transfer procedures.
- Classification
- Active helium/argon/CO₂ shielding blend
- Processes
- Specified stainless short-circuit GMAW · Miller RMD stainless GMAW
- Materials
- Compatible stainless steel
How to choose it
Check the wire, transfer mode and exact mixture. Miller's cited RMD guidance pairs this gas with high-silicon stainless wire such as 308LSi or 316LSi.
Limits and product details
This is an active blend, unsuitable for TIG or aluminium MIG. Do not treat it as the required gas for every stainless machine or programme.
Additional details
- Composition
- 90% helium / 7.5% argon / 2.5% carbon dioxide
- Wire context
- 308LSi and 316LSi are examples in the cited RMD guidance
- Alternative in cited procedure
- Miller also lists 98% argon / 2% CO₂
- Safety
- Use supplier-approved regulators, ventilation and cylinder handling
References
Information checked 2026-10-14.
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- Product information · Composition · Wire context · Alternative in cited procedureOpens the source in a new tabmillerwelds.comLink checked · 31 Oct