Welding - Airgas.com

FAQ
Welding



What does Airgas Gaspro have in the line of multipurpose welders?
What brand of electrodes, TIG rod and MIG wire does Airgas Gaspro carry?
What equipment do I need to perform TIG, MIG or Stick process?
What type of gas is needed to MIG and TIG?
Why should I use an alternative fuel gas instead of Acetylene?
What is MIG, TIG welding?


  • What does Airgas Gaspro have in the line of multipurpose welders?
    Airgas Gaspro stocks Miller Electric welders, such as the XMT-304, Phoenix 456 and Shopmaster 300. Other Miller multiprocessors can be obtained in two to three weeks in most instances.

    Listed below is a short list of the various types of MIG and TIG welding machines available from Airgas Gaspro.

    • TIG Machines
    • Syncrowave 180SD
    • licrowave 250
    • Syncrowave 250 TIGrunner
    • Syncrowave 350
    • Shopmaster 300
    • Maxstar 140
    • Dynasty TIGrunner
    • Thermalarc Dragster
    • Thermalarc 190

    • MIG Machines
    • Millermatic 130 XP
    • Millermatic 172
    • Millermatic 185
    • Millermatic 250X
    • Millermatic Vintage
    • Regency 250


  • What brand of electrodes, TIG rod and MIG wire does Airgas Gaspro carry?
    Airgas Gaspro carrys a wide variety of Hobart and ESAB filler metals, as well as our own Radnor brand of filler metals. Come and vist our store to see our large assortment.


  • What equipment do I need to perform TIG, MIG or Stick process?
    Listed below are a few common processes along with a list of required equipment for each process:

    • Stick welding aluminum:
    • ESAB 34 stick aluminum welding rod
    • Any stick welder will work with this electrode

    • MIG welding aluminum:
    • ESAB 5356 and 4043 aluminum wire
    • Millermatic 185 and 250X with spoolguns
    • XMT-304, Phoenix 456 with XR and 30A push-pull system

    • TIG welding aluminum:
    • ESAB cut lengths 4043 & 5356
    • Syncrowave 180SD
    • Syncrowave 250
    • Syncrowave 250 TIGrunner
    • Syncrowave 350
    • Dynasty DX TIG Runner

    Crome Moly can be welded with stick, TIG or MIG though MIG is rarely done.
    Mild steel can be welded with stick , TIG or MIG.


  • What type of gas is needed to MIG and TIG?
    Listed below are types of gas needed for MIG and TIG processes:

    • MIG welding gases:
    • Mild steel
    • Argoshield Lite for thin mild
    • Argoshield Medium C-25 1/8 to _
    • Argoshield Heavy for heavier sections and spray transfer

    • Stainless:
    • Stainshield light for thin sections
    • Stainless Medium for medium sections
    • Stainless Heavy for heavy sections

    • Aluminum:
    • Alushield Light for thin aluminum sections
    • Alushield Medium for medium sections
    • Alushield Heavy for heavy sections
    • Helium
    • Argon


  • Why should I use an alternative fuel gas instead of acetylene?
    There are several advantages in using Mapp. First, Mapp gas is much safer to store and handle than acetylene; cylinders are relatively insensitive to shock of blow or rough handling.

    Second, Mapp is much more concentrated than acetylene, thus a 20# cylinder (the size of a five gallon propane tank) contains the same heat energy as 300 cubic feet of acetylene weighing several hundred pounds and is much easier to handle. It also means that larger Mapp cylinders can be used to reduce frequency of cylinder changes saving time and reducing safety hazards.

    Third, Mapp cylinders can be quickly filled in the islands and are not sent to the mainland for filling, reducing turn around time and shipping costs.

    Fourth, Mapp in automated systems is faster and less sensitive to the distance the tips must be maintained from the work surface, saving setup time and cutting time.

    Finally, Mapp creates no environmental problems, unlike acetylene. Simply put, Mapp gas is better than acetylene because it is safer, faster, and easier to work with, resulting in cost savings.


  • What is MIG, TIG welding?
    MIG welding, also called GMAW, extrudes a metal wire electrode from a gun held by the welder. Power is applied to the gun by a power supply that attempts to regulate voltage at a preset level set by the welding operator. The gun also carries a shielding gas to the nozzle of the gun. A trigger on the gun turns on the gas via a solenoid in the power supply and engages the contactor, also in the power supply. Current flows down the gun through the arc and back to the power supply via the ground clamp. This process has become very popular in the last 40 years because of its speed and ease of use.

    TIG welding, also called GTAW, uses a torch held by the welder to develop an arc. The power is supplied by a constant current power source. Unlike the MIG machine where the electrode is consumed in the puddle, the electrode is not consumed and filler metal is added by the operator. Current is then returned to the power source via the ground. Shielding gas is also supplied via the torch and it may or may not be controlled by the operator from the power source. While this process produces the highest quality welds, it also requires the highest skill level. It is also universal in terms of the material that can be joined. Recent developments have reduced the power requirements, the cost of the equipment and the size of the equipment. This has increased the popularity for a process that is over 50 years 



     



     




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