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What shielding gas should I use for welding?

6/29/2022

1 Comment

 
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​​Shielding gases are used while TIG and MIG welding to protect your weld puddle from being exposed to oxygen, nitrogen, and hydrogen in the atmosphere. These elements can interact with the molten metal and cause defects in your weld. Shielding gases can also help with arc starting, cleaning, penetration, and arc stability. These gases play an important role on your finished product as well as your welding experience.

With so many variations to pick from, welders commonly ask what is the best shielding gas for their application? Though the answer varies depending on the base metal and process, we've compiled a shielding gas selection guide to help with your selection. Our process engineering group is also available to do a free Gas Application Analysis to ensure you are getting the best results for your end product.

ARGON
As a shielding gas, argon provides the most stable arc combined with the most effective cleaning action. Argon offers welders excellent control of the welding arc and puddle.

CARBON DIOXIDE
Carbon dioxide is valuable in arc welding processes due to its high heat conductivity. Mixtures of carbon dioxide are often recommended to increase penetration of the weld.

HELIUM
Helium has a high voltage gradient and provides more heat than pure argon at equivalent arc lengths. Pure helium is excellent to use when the highest possible heat input is needed. Since helium is lighter and less dense than argon, two to three times as much is needed for equivalent shielding effectiveness.

HYDROGEN
Hydrogen provides high heat conductivity and reducing properties that make it a valuable shielding gas for stainless steel. It is also used to increase welding speed. Mixtures of hydrogen are often recommended to increase compatibility with certain materials. 

OXYGEN
The heat conductivity characteristics of oxygen are useful for increasing welding speed and improving material soundness, penetration, and head shape. 

In order to help make gas selection easier, please see the below charts with recommended shielding gases for common applications.
Shielding Gas Chart for TIG Welding
Shielding Gas Chart for MIG Welding
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Learn more about gases
Shielding Gas Chart for MIG Welding
Free gas application analysis
1 Comment
Genieknows gas link
9/29/2022 09:48:14 am

Help me to choose gas service for home and office..

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  • Products & Services
    • Fronius Welding Products
    • Welding & Cutting Equipment >
      • Free Welding Productivity Analysis
    • Welder Rentals & Repairs
    • Engineering
    • Machine Tools
    • Welding & Cutting Automation
  • Gases
    • Free Gas Application Analysis
    • Industrial & Welding Gases
    • Bulk & Microbulk Gas
    • PurityPlus Specialty Gases
  • Welder Training
    • Program Overview >
      • Fundamentals of Welding
      • Intermediate Welding >
        • Intermediate Stick
        • Intermediate TIG
        • Intermediate MIG >
          • Intermediate GMAW - Aluminum
          • Intermediate FCAW Self Shielded
          • Intermediate GMAW - Stainless Steel
      • Advanced Welding >
        • Advanced Stick
        • Advanced TIG
        • Advanced MIG
      • Welding Basics
      • Custom Classes & Open Practice Time
    • Pricing and Class Schedule
    • How to Register
    • Tour Our Facility
    • Why Earlbeck Technical Center
    • On Site Training
    • Frequently Asked Questions >
      • Are student loans, financial aid, or scholarships available?
      • How long does it take to complete the program?
      • Do you offer job placement?
      • How Much Money does a Welder Make?
      • What is the Job Outlook for Welders?
      • What should I bring for my first day of class?
  • Weld Testing
    • Welder Certification
    • Send In Weld Testing
    • AWS D1.1 Send in Test Kits
    • Frequently Asked Questions >
      • How much does a welding certification cost?
      • How do I become qualified for bridge work?
      • Does a Welding Certification Expire?
      • What is an ATF Test?
      • What Welding Certification Do I Need?
      • Why Should I Become a Certified Welder?
  • Welding 101 Blog
  • Locations & Contacts
    • Baltimore, MD
    • Beltsville, MD
    • York, PA
    • Scranton, PA
    • Southern MD Welding School
    • Scranton PA Welding School
    • Arnold MD Welding School
  • More...
    • Why Earlbeck >
      • Fabrication Company Case Study
    • History
    • Photo Gallery
    • Resources
    • Testimonials
    • Our Policies