Miller Electric XLT 135, XLT 165, XLT 165, XLT 135 warranty Common MIG Shielding Gases, Application

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7-16. Common MIG Shielding Gases

This is a general chart for common gases and where they are used. Many different combinations (mixtures) of shielding gases have been developed over the years. The most commonly used shielding gases are listed in the following table.

				Application

Gas		Spray Arc Steel	Short Circuiting Steel		Short Circuiting	Short Circuiting
		Spray Arc Steel	Short Circuiting Steel		Stainless Steel	Aluminum
					Stainless Steel	Aluminum

Argon						All Positions

Argon + 25% CO	2	Flat & Horizontal1 Fillet	All Positions		All Positions2
	2

CO2		Flat & Horizontal1 Fillet	All Positions
Tri-Mix3					All Positions

1Globular Transfer

2Single Pass Welding Only

390% HE + 7-1/2% AR + 2-1/2% CO2

OM-198 076 Page 37

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Contents Processes OM-198 076ADescription AprilPage Table of Contents Page Marks a special safety message Symbol UsageArc Welding Hazards Electric Shock can killWelding can cause fire or explosion ARC Rays can burn eyes and skinFlying Metal can injure eyes Buildup of GAS can injure or killPrincipal Safety Standards About Pacemakers EMF Information− Consignes DE Securite − Lire Avant Utilisation Signification des symbolesUN Choc Électrique peut tuer LES Fumées ET LES GAZ peuvent être dangereuxDES Particules Volantes peuvent blesser les yeux LE Soudage peut provoquer un incendie ou une explosionDES Pièces Chaudes peuvent pro- voquer des brûlures graves LE Bruit peut affecter l’ouïeLA Chute DE L’APPAREIL peut blesser Risque D’INCENDIE OU’EMPLOI Excessif peut DES Organes Mobiles peuvent provoquer des blessuresConsignes relatives aux stimulateurs cardiaques Principales normes de sécuritéInformation sur les champs électromagnétiques VAC Model − SpecificationsSpecifications Output Duty Cycle % Duty Cycle And OverheatingOutput Amperes OverheatingVolt-Ampere Curves Installing Welding Gun Installing Work Clamp − InstallationChanging Polarity Process/Polarity TableFlow Adjust Installing Gas SupplyCO2 Adapter Customer Sup- plied Regulator/flowmeter and CO2 cylinder CO2 GasGrounded Receptacle Rating LabelVolt, 20 ampere individual Up to 200 ft 61 mPlug Do not move or operate unit where it could tipReceptacle See SectionInstalling Wire Spool And Adjusting Hub Tension Electrical Service Guide For 230 VAC ModelStandard Wire Spool 8 Lb Wire Spool 4 Adjusting Hub TensionThreading Welding Wire Power Switch OM-198 076 Voltage Switch− Operation ControlsWeld Parameters For 115 VAC Model Weld Parameters For 230 VAC Model Routine Maintenance − Maintenance &TROUBLESHOOTINGOverload Protection Drive Motor ProtectionReplacing Gun Contact Tip Changing Drive Roll Or Wire Inlet GuideTurn Off power before replacing contact tip To Reassemble Gun Cleaning Or Replacing Gun LinerDisconnect gun from unit Replacing Switch And/Or Head Tube Does not run Troubleshooting TableTrouble Remedy Circuit Diagram For 115 VAC Model − Electrical DiagramCircuit Diagram For 230 VAC Model Typical MIG Process Connections − MIG Welding Gmaw GuidelinesWire Size Amperage Range Typical MIG Process Control SettingsSelect Wire Size Recommendation Wire Speed Select VoltageHolding And Positioning Welding Gun Push Perpendicular Drag Conditions That Affect Weld Bead ShapeShort Normal Long ShortNormalLongGun Movement During Welding Poor Weld Bead CharacteristicsGood Weld Bead Characteristics Troubleshooting − Porosity Troubleshooting − Excessive SpatterTroubleshooting − Excessive Penetration Possible Causes Corrective ActionsTroubleshooting − Burn-Through Troubleshooting − Lack Of PenetrationTroubleshooting − Incomplete Fusion Troubleshooting − Distortion Troubleshooting − Waviness Of BeadBase metal to move DirectionFlat & Horizontal1 Fillet Common MIG Shielding GasesApplication Main Assembly − Parts ListDia Part Description Quantity Mkgs Gun 024 .6 and .045 042024 .6 and .030/.035 .8 Page Warranty Owner’s Record