Engineering English
Shielding Gas
Manufacturing Engineering · Last updated: July 30, 2026 · How this entry was written
Definition: A gas or gas mixture used in arc welding to protect the molten weld pool from atmospheric contamination by oxygen, nitrogen, and water vapor.
Example in context
“The shielding gas composition for GMAW of carbon steel is typically 75% argon and 25% carbon dioxide.”
“Karbon çeliğinin GMAW kaynağında koruyucu gaz bileşimi tipik olarak %75 argon ve %25 karbondioksittir.”
Where engineers use it
Engineers select shielding gas based on base metal, desired weld characteristics, and process. It is critical for preventing porosity and ensuring sound welds.
Synonyms: protective gas, cover gas
Antonyms: atmosphere
Practice: can you use “Shielding Gas” at work?
A welding supervisor notices excessive spatter on aluminum MIG welds. The operator is using pure argon; the supervisor suspects the shielding gas flow rate is too low.
Show a model answer
“Select the appropriate shielding gas for GMAW of stainless steel.”
“Shielding Gas” in 21 languages
| English | Shielding Gas |
|---|---|
| Turkish | koruyucu gaz |
| French | gaz de protection |
| German | Schutzgas |
| Spanish | gas de protección |
| Chinese | 保护气体 |
| Arabic | غاز واقي |
| Portuguese | gás de proteção |
| Russian | защитный газ |
| Japanese | シールドガス |
| Italian | gas di protezione |
| Vietnamese | khí bảo vệ |
| Hindi | शील्डिंग गैस |
| Thai | แก๊สปกคลุม |
| Indonesian | gas pelindung |
| Korean | 차폐 가스 |
| Bengali | প্রতিরক্ষামূলক গ্যাস |
| Dutch | beschermgas |
| Swedish | skyddsgas |
| Finnish | suojakaasu |
| Ukrainian | захисний газ |
Frequently asked questions
What does Shielding Gas mean in engineering?
A gas or gas mixture used in arc welding to protect the molten weld pool from atmospheric contamination by oxygen, nitrogen, and water vapor. In Manufacturing Engineering, the term carries a usage-frequency rating of 10/10 in the Engineering English library.
How do you pronounce Shielding Gas?
Shielding Gas is pronounced /ˈʃiːldɪŋ ɡæs/ (IPA). The Engineering English app plays audio for the term and checks your pronunciation with speech recognition.
How is Shielding Gas used in a sentence?
Example from an engineering context: “The shielding gas composition for GMAW of carbon steel is typically 75% argon and 25% carbon dioxide.”
This entry is one of 7,806 terms in the Engineering English iOS app — with quizzes, spaced repetition and pronunciation checking.
Get the app on the App Store