Lincoln Mig

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Lincoln Mig
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Lincoln Electric LN-25 PRO MIG Welder
Lincoln Electric LN-25 PRO MIG Welder
Paypal   US $1,500.00
LINCOLN RS3 325 MIG WELDER WITH LN7 WIRE FEEDER
LINCOLN RS3 325 MIG WELDER WITH LN7 WIRE FEEDER
Paypal   US $775.00
LINCOLN WELDER POWER MIG 215
LINCOLN WELDER POWER MIG 215
Paypal   US $1,525.00
LINCOLN 180HD MIG WELD PAK WIRE FEED ELECTRIC WELDER,MODEL 2515-1, NIB!!
LINCOLN 180HD MIG WELD PAK WIRE FEED ELECTRIC WELDER,MODEL 2515-1, NIB!!
Paypal   US $525.00
LINCOLN IDEALARC MIG WELDER MODEL SP-150
LINCOLN IDEALARC MIG WELDER MODEL SP-150
Paypal   US $750.00
Lincoln Electric Pro-Mig 140 - MIG Welder Kit - 110/120V Electric
Lincoln Electric Pro-Mig 140 - MIG Welder Kit - 110/120V Electric
Paypal   US $217.50
Mig Wire Spool 25 lb Lincoln Elec.045 Stainless Steel Flux Cored FC309L
Mig Wire Spool 25 lb Lincoln Elec.045 Stainless Steel Flux Cored FC309L
Paypal   US $56.95
Tweco Lincoln 15' Mig Liner 42-3035-15 Welding 030 035
Tweco Lincoln 15' Mig Liner 42-3035-15 Welding 030 035
Paypal   US $10.99
Lincoln Weld-Pak 3200HD K2190-1 MIG  welder very nice used condition ready!!
Lincoln Weld-Pak 3200HD K2190-1 MIG welder very nice used condition ready!!
Paypal   US $255.00
Lincoln Nascar Licensed MIG  Welder SP-135 Plus /w Cart and Bottle + Wire
Lincoln Nascar Licensed MIG Welder SP-135 Plus /w Cart and Bottle + Wire
Paypal   US $275.00
LINCOLN KP1937-3 .023/.035 MIG GUN LINER
LINCOLN KP1937-3 .023/.035 MIG GUN LINER
Paypal   US $21.57
LINCOLN SUPERARC L-56 .025
LINCOLN SUPERARC L-56 .025" 2LB SPOOL MIG WIRE ER70S-6 & ER70S-6 .024 copper
Paypal   US $18.00
Lincoln magnum 400 mig gun
Lincoln magnum 400 mig gun
Paypal   US $.99
Lincoln Electric Pro Mig 140 Mig/Flux Welder NEW!
Lincoln Electric Pro Mig 140 Mig/Flux Welder NEW!
Paypal   US $201.00
Lincoln Weldpak 100 120 Volt Mig And Flux Welder
Lincoln Weldpak 100 120 Volt Mig And Flux Welder
Paypal   US $150.00
Lincoln Power MIG 180 Dual MIG Welder Package K3018-2
Lincoln Power MIG 180 Dual MIG Welder Package K3018-2
Paypal   US $965.00
Lincoln Electric Pro-Mig 180 Wire Feed Welder. NEW! SEALED
Lincoln Electric Pro-Mig 180 Wire Feed Welder. NEW! SEALED
Paypal   US $438.88
Lincoln Electric  K2979-All Traditional MIG/Stick Welding Glove
Lincoln Electric K2979-All Traditional MIG/Stick Welding Glove
Paypal   US $10.40
Magnum 100L K530-6 Mig Weld Gun Torch Stinger Lincoln
Magnum 100L K530-6 Mig Weld Gun Torch Stinger Lincoln
Paypal   US $97.95
Lincoln Magnum 100 SG Spool Gun Mig Welder Aluminum
Lincoln Magnum 100 SG Spool Gun Mig Welder Aluminum
Paypal   US $148.00
LINCOLN MIG CONVERSION KIT K610-1 NEW 120V
LINCOLN MIG CONVERSION KIT K610-1 NEW 120V
Paypal   US $149.87
Lincoln LN-7 GMA/MIG Wire Feeder
Lincoln LN-7 GMA/MIG Wire Feeder
Paypal   US $500.00
LINCOLN WORK-PAK 125 MIG WELDER 120V U2699-2 REFURB
LINCOLN WORK-PAK 125 MIG WELDER 120V U2699-2 REFURB
Paypal   US $329.87
LINCOLN ELECTRIC 140 HD WELD PAK MIG WELDER NEW NIB
LINCOLN ELECTRIC 140 HD WELD PAK MIG WELDER NEW NIB
Paypal   US $519.00
LINCOLN KP45-40-15 .035/.045 MIG GUN LINER
LINCOLN KP45-40-15 .035/.045 MIG GUN LINER
Paypal   US $20.77
Lincoln LN-7 Mig Welding Wire Feeder w 11' REACH BOOM
Lincoln LN-7 Mig Welding Wire Feeder w 11' REACH BOOM
Paypal   US $2,499.99
Lincoln CV-250 Mig Welder LN7 Wire Feeder 250A with gun
Lincoln CV-250 Mig Welder LN7 Wire Feeder 250A with gun
Paypal   US $1,999.99
Lincoln Wirematic 250 Mig Welder 200A 1ph 230/460/575V
Lincoln Wirematic 250 Mig Welder 200A 1ph 230/460/575V
Paypal   US $1,399.99
Lincoln Power Mig 255 mig welder 250A 1phase with gun
Lincoln Power Mig 255 mig welder 250A 1phase with gun
Paypal   US $1,599.99
Lincoln Electric DC 600 Mig Stick Welder LN-7 600amp
Lincoln Electric DC 600 Mig Stick Welder LN-7 600amp
Paypal   US $2,249.99
Lincoln Powerwave 450 MIG WELDER 450A Synergic 7 Feeder
Lincoln Powerwave 450 MIG WELDER 450A Synergic 7 Feeder
Paypal   US $3,749.99
Lincoln Power Mig 255C Mig Welder 250amp w gun 230/460/575V
Lincoln Power Mig 255C Mig Welder 250amp w gun 230/460/575V
Paypal   US $1,599.99
Lincoln Power Mig 255 mig welder 250A 1phase with gun
Lincoln Power Mig 255 mig welder 250A 1phase with gun
Paypal   US $1,599.99
Lincoln Mig Welding Gun Liner KP1937-3 Magnum 100 L
Lincoln Mig Welding Gun Liner KP1937-3 Magnum 100 L
Paypal   US $9.95
2 Mig Gas Diffusers Lincoln SP135 SP175 Magnum 100L Gun
2 Mig Gas Diffusers Lincoln SP135 SP175 Magnum 100L Gun
Paypal   US $4.00
LINCOLN ELECTRIC HANDY MIG WIRE WELDER    K2185-1
LINCOLN ELECTRIC HANDY MIG WIRE WELDER K2185-1
Paypal   US $329.95
11-30 MIG CONTACT TIPS FITS LINCOLN/TWECO WELDING GUN
11-30 MIG CONTACT TIPS FITS LINCOLN/TWECO WELDING GUN
Paypal   US $10.25
 LINCOLN  MIG WELDER COVER  POWER MIG 140 - 180 K2377-1
LINCOLN MIG WELDER COVER POWER MIG 140 - 180 K2377-1
Paypal   US $41.87
Lincoln Electric Auto Darkening Welding Helmet 9-13 Solar Powered TIG MIG Stick
Lincoln Electric Auto Darkening Welding Helmet 9-13 Solar Powered TIG MIG Stick
Paypal   US $119.99
10 Contact Tips 11-30 for Tweco Lincoln MIG Welding Gun
10 Contact Tips 11-30 for Tweco Lincoln MIG Welding Gun
Paypal   US $2.95
Lincoln K610-1 MIG Conversion Kit (NEW)
Lincoln K610-1 MIG Conversion Kit (NEW)
Paypal   US $126.98
25 Contact Tips 11-35 0.035
25 Contact Tips 11-35 0.035" Tweco Lincoln MIG Weld Gun
Paypal   US $5.95
Lincoln K2532-1 Magnum 100Sg Spool Gun Mig 140C / 180C
Lincoln K2532-1 Magnum 100Sg Spool Gun Mig 140C / 180C
Paypal   US $273.32
5 Gas Diffusers 35-50 for Tweco Lincoln MIG Welding Gun
5 Gas Diffusers 35-50 for Tweco Lincoln MIG Welding Gun
Paypal   US $6.75
Cable Liner for Lincoln Handy Core Weld-Pak HD Mig Pak HD Mig Welder Parts
Cable Liner for Lincoln Handy Core Weld-Pak HD Mig Pak HD Mig Welder Parts
Paypal   US $9.95
Lincoln U2185-1 Handy MIG
Lincoln U2185-1 Handy MIG
Paypal   US $274.60
LINCOLN MIG CONVERSION KIT K610-2
LINCOLN MIG CONVERSION KIT K610-2
Paypal   US $158.87
LINCOLN Power MIG 140 & 180 COVER K2377-1
LINCOLN Power MIG 140 & 180 COVER K2377-1
Paypal   US $39.00
Lincoln K2378-1 Canvas Cover for Power MIG 216, 215, 255C or Precision TIG 225
Lincoln K2378-1 Canvas Cover for Power MIG 216, 215, 255C or Precision TIG 225
Paypal   US $69.00
Lincoln MIG Conversion Kit K610-1
Lincoln MIG Conversion Kit K610-1
Paypal   US $150.00
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Lincoln Electric Easy MIG 140 115V Flux Cored/MIG Welder - 140 Amp Output, Model# K2697-1 Lincoln Electric Easy MIG 140 115V Flux Cored/MIG Welder - 140 Amp Output, Model# K2697-1
List Price: $1,026.32
Sale Price: $550.00

This Lincoln Easy MIG 140 welder uses common 120V power and is a fine choice for home projects, farm repairs or basic auto body work. It features simple 2-knob tapped control for easy set up of either gas-less flux cored welding or gas shielded MIG welding. Volts: 120, Amps: 140, Duty Cycle: 20% at 90 Amps, 19.5 Volts, Mig Ready: Yes, Wire Feed Speed Control: 50-500 IPM, Weldable Metals: Steel, aluminum, Weld Thickness (in.): Up to 5/16 in. mild steel, Clamp Cable Length (ft.): 10, Regulator and Gas Hose Included: Yes, Shielding Gas Required: Yes, when welding MIG, Welding Wire Diameter (in.): .025-.045, Power Cord (ft.): 6, Cart: No, Dimensions L x W x H (in.): 18 5/8 x 10 1/8 x 14

Lincoln Electric K2185-1 Handy MIG Welder Lincoln Electric K2185-1 Handy MIG Welder
List Price: $508.16
Sale Price: $380.99

LEWK2185-1 Features: -Welds both MIG (shielding gas sold separately) and flux-cored.-Cold contactor safety feature keeps welding wire electrically “cold” until gun trigger is pressed.-Input power: 115/1/60.-Input current@ rated output: 20A.-Handy Mig Welder. Specifications: -35-88 amps output; welds up to 1/8 in. mild steel.-Plugs into household 115V, 20 amp outlet.-Rated output curent/voltage/duty cycle: 70A / 17V / 20pct.-Output range: 35-88A WFS while welding: 0-300 ipm; Max. OCV: 29V. Dimensions: -Dimensions: 12.8" x 8.8" x 18".-Net weight: 46 lbs.. Warranty: -1 yr warranty on material and workmanship.

Lincoln K2377-1 Small Canvas Cover Power Mig 140C/ 180C Lincoln K2377-1 Small Canvas Cover Power Mig 140C/ 180C
List Price: $45.00
Sale Price: $38.98

Protect your welder when not in use. Made from attractive red canvas that is flame retardant, mildew resistant and water repellent. Includes a convenient side pocket to hold your welding torch or gun.

Lincoln K2532-1 Magnum 100Sg Spool Gun Mig 140C / 180C Lincoln K2532-1 Magnum 100Sg Spool Gun Mig 140C / 180C
List Price: $252.00
Sale Price: $205.00

The Magnum 100SG spool gun is the lowest cost way to add reliable and precise spool gun wire feeding performance for soft aluminum wire. Its easy to set up, does not require a bulky outboard adapter/power module and shares gun expendable parts with the standard MIG gun included with the Power MIG models. The Magnum 100SG is a reliable, low-price aluminum welding spool gun for novice and experienced welders. For added protection, the Magnum 100SG comes with a cushioned carrying case. To reduce the number of expendable parts needed, this spool gun uses the same contact tips and nozzles as the standard Magnum 100L MIG gun.Advantage LincolnPRODUCTIVITY Lightweight at only 3.5 lbs. (1.6 Kg). All combinations of specified aluminum alloys and wire diameters can be fed with the same drive roll and liner assembly. .030-.035 (0.8-0.9 mm) drive roll included. EASE-OF-USE Professionally-styled, smooth exterior with ergonomic grip and balance. Full travel mechanical trigger can be easily felt through a welding glove. 10 ft (3.0 m) gun cable, control harness, and gun connector offers fast connections to the welding machine. No expensive gun or bulky adapter module is required. PEACE-OF-MIND Uses the same tips, diffuser, and nozzles as the Magnum 100L. Cushioned carrying case protects the gun during storage. 90-days warranty on parts and labor.Physical specifications:Weight:3.5 lbs. (1.6 kgs. )Dimensions (in) H x W x D : 15.75 x 10.50 x 4.25Dimensions (mm) H x W x D : 400 x 267 x 1080Processes:MIG/GMAW This will ship from your nearest Lincoln Electric warehouse.  This product cannot ship outside of the 48 states.

Hobart 500550 Auto Arc 130 Wire Feed MIG Welding Kit Hobart 500550 Auto Arc 130 Wire Feed MIG Welding Kit
Sale Price: $365.70

The Auto Arc 130 operates off 115-volt standard household current. It comes ready to weld with or without shielding gas using .023-.035 solid wire or .030-.035 flux cored wire. The 500550 Auto Arc 130 Package includes a welding cart, welding helmet and fixed flow MIG regulator kit. With an amperage output range of 30 - 130, it easily handles a broad selection of solid mild steel or stainless, flux cored and aluminum wires. Features: Welds 22 gauge up to 3/16-Inch steel Proven built-in wire feeder with quick-release drive roll lever, Built-in contactor eases use and is an excellent safety feature which makes wire electrically "cold" when not welding. Four output voltage settings with wire feed tracking provide quick and easy adjustment for different materials and thickness. Dual groove drive rolls make it easy to switch between .023/.025-Inch (0.6 mm) and .030 - .035-Inch (0.8 - 0.9 mm) wire. Self-resetting thermal overload and motor protection. Specifications: Rated Output at 20-percent Duty: 85A at 17.5 VDC, Cycle: 51A at 21VDC (CSA Rating), Current Range: 30 - 130-Amp, Max Open Circuit Voltage: 27-volt, Wire Feed Speed Range w/o load: 0 - 500-Inch per Minute, Amps Input at 115V: 20 (15 is CSA rating).

Hobart 500549 Auto Arc 130 Wire Feed MIG Welder Hobart 500549 Auto Arc 130 Wire Feed MIG Welder
List Price: $329.99
Sale Price: $314.18

AutoArc 130 Welder by Hobart

Lincoln Electric Power MIG 180C K2473-1 Lincoln Electric Power MIG 180C K2473-1
List Price: $967.00
Sale Price: $875.00

LINK2473-1 Features: -Power MIG 180C. -Great ARC starts make getting started easy. -Wide voltage 'sweet spot' gives you a very forgiving ARC, so setting controls is a snap. -Extremely low spatter reduces clean-up. -Outstanding aluminum and stainless performance, not just mild steel. -Highest output in its class - use 0.025'' wire on the thinnest sheet metal up to 0.045'' flux-cored wire for thick plate. -Sheet metal in a single pass. -Weld up to 1/2'' steel using self-shielded Innershield wires (FCAW-S). -Dual gear-driven drive rolls for positive traction. -Patented split wire guides for optimal wire alignment. -Brass-to-Brass gun connections for enhanced connectivity. -Large industrial closed-design drive motor for improved torque and trouble-free performance. -Add the optional Magnum100SG spool gun for reliable operation at the high wire feed speeds aluminum welding demands. -No expensive outboard modules required. -For wire spool mounting, wire drive service and polarity changes. -Start out with more contact tips, nozzles, drive rolls and wire electrode for MIG or flux-cored welding. -Keeps all your consumables close at hand. -Provides an added measure of operator safety. -Channels airflow to cool power systems, structurally secures key components and traps wires and cables to avoid unnecessary abrasion. -'Potted' to seal sensitive components from the environment, 'trayed' in a tough plastic tray to add rigidity and shock resistance. -Three year warranty. Specifications: -Input power: 208/230/1/60. -Rated output: 130A/17V/30pct, 130A/20V/30pct. -Input current: 20A. -Output range: 30-180A DC. -Cored wire size range: 0.030''-0.045''. -Dimensions: 14'' H x 10.15'' W x 18.6'' D. Product Info Competitive Comparison

Lincoln Electric K2378-1 Mig/Tig 225 Cover Qty=1 Lincoln Electric K2378-1 Mig/Tig 225 Cover Qty=1
List Price: $72.00
Sale Price: $64.00

Lincoln Electric K2378-1 Canvas Cover (Medium) Protect your Power MIG when not in use. Made from attractive red canvas that is flame retardant, mildew resistant and water repellent. Fits Power MIG 215, 216, 255C and 350MP with or without a gas cylinder in the cylinder rack. Will not fit if spool gun holder is attached to the machine.Also fits Precision TIG 225.

MIG 100 Flux Wire Welder MIG 100 Flux Wire Welder
Sale Price: $115.40

90 Amp Flux wire, 120Volt / 60Hz, ETL approved. No Load Voltage: 31 Volt, adjustment positions: 2 steps. Range of current 50 to 80 Amp. Duty cycle: 15% at 80A, 20% at 65A. Rated duty cycle: 10% at 90amps. Insulation Class: F, welding wire size is 035 to 040 inches. Includes: Welding torch, tip, grounding cord with clamp Brush / hammer, Face shield, Flux cored wire .030 inch (2 pounds).

US Forge Welding MIG Contact Tips .035 6-Pack #00505 US Forge Welding MIG Contact Tips .035 6-Pack #00505
List Price: $6.99
Sale Price: $3.36

Suitable for use with Lincoln Electric SP-100L MIG gun; Tweco Products, Inc. Mini and #1 MIG guns; and Binzel MB15 gun.


Here are some more information for Lincoln Mig:
Lincoln Mig

Shielding gas

Common shielding gases

Shielding gases fall into two categoriesnert or semi-inert. Only two of the noble gases, helium and argon, are cost effective enough to be used in welding. These inert gases are used in gas tungsten arc welding, and also in gas metal arc welding for the welding of non-ferrous materials. Pure argon and helium are used only for some nonferrous metals. Semi-inert shielding gases, or active shield gases, include carbon dioxide, oxygen, nitrogen, and hydrogen. Most of these gases, in large quantities, would damage the weld, but when used in small, controlled quantities, can improve weld characteristics.

Properties of shielding gases

The important properties of shielding gases are their thermal conductivity and heat transfer properties, their density relative to air, and how easy they undergo ionization. Gases heavier than air (e.g. argon) blanket the weld and require lower flow rates than gases lighter than air (e.g. helium). Heat transfer is important for heating the weld around the arc. Ionizability influences how easy the arc starts, and how high voltage is required. Shielding gases can be used pure, or as a blend of two or three gases. In laser welding, the shielding gas has an additional role, preventing formation of a cloud of plasma above the weld, absorbing significant fraction of the laser energy. This is important for CO2 lasers; Nd:YAG lasers show lower tendency to form such plasma. Helium plays this role best due to its high ionization potential; the gas can absorb high amount of energy before becoming ionized.

Helium is lighter than air; larger flow rates are required. It is an inert gas, not reacting with the molten metals. Its thermal conductivity is high. It is not easy to ionize, requiring higher voltage to start the arc. Due to higher ionization potential it produces hotter arc at higher voltage, provides wide deep bead; this is an advantage for aluminium, magnesium, and copper alloys. Other gases are often added. Blends of helium with addition of 5-10% of argon and 2-5% of carbon dioxide ("tri-mix") can be used for welding of stainless steel. Used also for aluminium and other non-ferrous metals, especially for thicker welds. In comparison with argon, helium provides more energy-rich but less stable arc. Helium and carbon dioxide were the first shielding gases used, since the beginning of World War 2. Helium is used as a shield gas in laser welding for carbon dioxide lasers. Helium is more expensive than argon and requires higher flow rates, so despite its advantages it may not be a cost-effective choice for higher-volume production. Pure helium is not used for steel, as it then provides erratic arc and encourages spatter.

Argon is heavier than air; lower flow rates are needed to blanket the weld. It is an inert gas, not reacting with the molten metals. It has low thermal conductivity. It ionizes easily, providing a stable arc with an excellent current path and high current density. It produces a very narrow arc cone and narrow penetration profile. It is often used as pure when welding aluminium and other nonferrous metals, though other gases can be added; pure argon does not provide sufficient penetration for welding steel. A blend of argon with 25-50% of helium is used for some nonferrous metals, as helium improves heat transfer into the base material and makes the molten metal more fluid. An oxidizing component (oxygen, carbon dioxide) is usually added to stabilize the arc for welding of steels; without it the arc control can be difficult as the arc tends to stray. In industrial gas business it is known as "the big A". Argon is used as a shield gas in laser welding for Nd:YAG lasers.

Carbon dioxide has good heat transfer properties; it dissociates in the weld and recombines in contact with the colder metal. Produces very deep weld but somewhat unstable arc and, due to its reactivity, intense spatter. Due to the presence of dissociated oxygen, the weld zone has oxidizing properties, producing more slag. Carbon dioxide can be used as pure (only for short-circuiting), or in a mixture with 5 to 25% argon, sometimes up to 50% (also for spray transfer); the argon addition inhibits sputtering. Increasing percentage of carbon dioxide increases the width and depth of the weld penetration. For welding of stainless steels where carbon content control is required, an argon-helium blend with 1-2% of carbon dioxide can be used. "Trimix" blends of argon-oxygen-carbon dioxide are more common in United Kingdom, while argon-carbon dioxide blends are more common in the USA. In comparison with argon-carbon dioxide mixture, for steel welding, pure carbon dioxide increases spatter and the arc is less stable. Pure carbon dioxide provides deep weld penetration and is very cheap. Pure carbon dioxide usage is limited to short circuit and globular transfer welding. It has high spatter and deep penetration. Provides good mechanical properties. Can be used for carbon steel. Has high production of smoke and fumes. It is very cheap.

Oxygen is used in small amounts as an addition to other gases; typically as 2-5% addition to argon. It enhances arc stability and reduces the surface tension of the molten metal, increasing wetting of the solid metal. It is used for spray transfer welding of mild carbon steels, low alloy and stainless steels. Its presence increases the amount of slag. Argon-oxygen (Ar-O2) blends are often being replaced with argon-carbon dioxide ones. Argon-carbon dioxide-oxygen blends are also used. Oxygen causes oxidation of the weld, so it is not suitable for welding aluminium, magnesium, copper, and some exotic metals. Increased oxygen makes the shielding gas oxidize the electrode, which can lead to porosity in the deposit if the electrode does not contain sufficient deoxidizers. Excessive oxygen, especially when used in application for which it is not prescribed, can lead to brittleness in the heat affected zone. Argon-oxygen blends with 1-2% oxygen are used for austenitic stainless steel where argon-CO2 can not be used due to required low content of carbon in the weld; the weld has a tough oxide coating and may require cleaning.

Nitrogen is used for welding of some stainless steels. It increases the weld penetration and enhances arc stability. It however can cause porosity in carbon steels. Argon-carbon dioxide-nitrogen blends can be used. Pure nitrogen is also used, or can be blended with 10% of hydrogen, depending on application. Blends with nitrogen content are used to weld nitrogen-containing alloys (up to 0.5% nitrogen increases mechanical properties and resistance to pitting corrosion) to prevent loss of nitrogen from the metal. Nitrogen can be used in some cases of laser welding; it is almost as good as helium for plasma formation suppression but can cause embrittlement of some steels.

Hydrogen is used for welding of nickel and some stainless steels, especially thicker pieces. It improves the molten metal fluidity, and enhances cleanness of the surface. It can however cause hydrogen embrittlement of many alloys and especially carbon steel, so its application is usually limited only to some stainless steels. It is added to argon in amounts typically under 10%. It can be added to argon-carbon dioxide blends to counteract the oxidizing effects of carbon dioxide. Its addition narrows the arc and increases the arc temperature, leading to better weld penetration. In higher concentrations (up to 25% hydrogen), it may be used for welding conductive materials such as copper. However, it should not be used on steel, aluminum or magnesium because it can cause porosity and hydrogen embrittlement.

Nitric oxide addition serves to reduce production of ozone. It can also stabilize the arc when welding aluminium and high-alloyed stainless steel.

Other gases can be used for special applications, pure or as blend additives; e.g. sulfur hexafluoride or dichlorodifluoromethane.

Sulfur hexafluoride can be added to shield gas for aluminium welding to bind hydrogen in the weld area to reduce weld porosity.

Dichlorodifluoromethane with argon can be used for protective atmosphere for melting of aluminium-lithium alloys. It reduces the content of hydrogen in the aluminium weld, preventing the associated porosity.

Common mixes

C-50 (50% argon/50% CO2) is used for short arc welding of pipes,

C-40 (60% argon/40% CO2) is used for some flux-cored arc welding cases. Better weld penetration than C-25.

C-25 (75% argon/25% CO2) is commonly used by hobbyists and in small-scale production. Limited to short circuit and globular transfer welding. Common for short-circuit gas metal arc welding of low carbon steel.

C-20 (80% argon/20% CO2) is used for short-circuiting and spray transfer of carbon steel.

C-15 (85% argon/15% CO2) is common in production environment for carbon and low alloy steels. Has lower spatter and good weld penetration, suitable for thicker plates and steel significantly covered with mill scale. Suitable for short circuit, globular, pulse and spray transfer welding. Maximum productivity for thin metals in short-circuiting mode; has lower tendency to burn through than higher-CO2 mixes and has suitably high deposition rates.

C-10 (90% argon/10% CO2) is common in production environment. Has low spatter and good weld penetration, though lower than C-15 one; suitable for many steels. Same applications as 85/15 mix. Sufficient for ferritic stainless steels.

C-5 (95% argon/5% CO2) is used for pulse spray transfer and short-circuiting of low alloy steel. Has better tolerance for mill scale and better puddle control than argon-oxygen, though less than C-10. Less heat than C-10. Sufficient for ferritic stainless steels. Similar performance to argon with 1% oxygen.

O-5 (95% argon/5% oxygen) is the most common gas for general carbon steel welding. Higher oxygen content allows higher speed of welding.

O-2 (98% argon/2% oxygen) is used for spray arc on stainless steel, carbon steels, and low alloy steels. Better wetting than O-1. Weld is darker and more oxidized than with O-1.

O-1 (99% argon/1% oxygen) is used for stainless steels. Oxygen stabilizes the arc

A-25 (75% argon/25% helium) is used for nonferrous base when higher heat input and good weld appearance are needed.

A-50 (50% argon/50% helium) is used for nonferrous metals thinner than 0.75 inch for high-speed mechanized welding.

A-75 (25% argon/75% helium) is used for mechanized welding of thick aluminium. Reduces weld porosity in copper.

H-2 (98% argon/2% hydrogen)

H-5 (95% argon/5% hydrogen)

H-10 (80% argon/20% hydrogen)

H-35 (65% argon/35% hydrogen)

Argon with 25-35% helium and 1-2% CO2 provides high productivity and good welds on austenitic stainless steels. Can be used for joining stainless steel to carbon steel.

Argon-CO2 with 1-2% hydrogen provides a reducing atmosphere that lowers amount of oxide on the weld surface, improves wetting and penetration. Good for austenitic stainless steels.

Argon with 2-5% nitrogen and 2-5% CO2 in short-circuiting yields good weld shape and color and increases welding speed. For spray and pulsed spray transfer it is nearly equivalent to other trimixes. When joining stainless to carbon steels in presence of nitrogen, care has to be taken to ensure the proper weld microstructure. Nitrogen increases arc stability and penetration and reduces distortion of the welded part. In duplex stainless steels assists in maintaining proper nitrogen content.

85-95% helium with 5-10% argon and 2-5% CO2 is an industry standard for short-circuit welding of carbon steel.

Argon-carbon dioxide-oxygen

Argon-helium-hydrogen

Argon-helium-hydrogen-carbon dioxide

Applications

The applications of shielding gases are limited primarily by the cost of the gas, the cost of the equipment, and by the location of the welding. Some shielding gases, like argon, are expensive, limiting its use. The equipment used for the delivery of the gas is also an added cost, and as a result, processes like shielded metal arc welding, which require less expensive equipment, might be preferred in certain situations. Finally, because atmospheric movements can cause the dispersion of the shielding gas around the weld, welding processes that require shielding gases are often only done indoors, where the environment is stable and atmospheric gases can be effectively prevented from entering the weld area.

The desirable rate of gas flow depends primarily on weld geometry, speed, current, the type of gas, and the metal transfer mode being utilized. Welding flat surfaces requires higher flow than welding grooved materials, since the gas is dispersed more quickly. Faster welding speeds, in general, mean that more gas needs to be supplied to provide adequate coverage. Additionally, higher current requires greater flow, and generally, more helium is required to provide adequate coverage than argon. Perhaps most importantly, the four primary variations of GMAW have differing shielding gas flow requirementsor the small weld pools of the short circuiting and pulsed spray modes, about 10 L/min (20 ft3/h) is generally suitable, while for globular transfer, around 15 L/min (30 ft3/h) is preferred. The spray transfer variation normally requires more because of its higher heat input and thus larger weld pool; along the lines of 2025 L/min (4050 ft3/h).

See also

Forming gas

References

^ Lyttle, Kevin. (2005-01-11) Simplifying shielding gas selection. TheFabricator. Retrieved on 2010-02-08.

^ The Evolution of Shielding Gas. Aws.org. Retrieved on 2010-02-08.

^ Laser welding: a practical guide - Google-kirjat. Books.google.cz. Retrieved on 2010-02-08.

^ Bernard - Great Welds Need The Right Gas: How Shielding Gas Can Make Or Break Your Weld. Bernardwelds.com. Retrieved on 2010-02-08.

^ MIG Welding Gas Comparison. Mig-welding.co.uk. Retrieved on 2010-02-08.

^ Welding gas is used for MIG/MAG welding to shield the welding arc. Learn-how-to-weld.com. Retrieved on 2010-02-08.

^ Frequently Asked MIG Welding Questions. Lincoln Electric. Retrieved on 2010-02-08.

^ Shielding gas for laser welding - Patent 3939323. Freepatentsonline.com. Retrieved on 2010-02-08.

^ Method of welding material with reduced porosity - Patent Application 20070045238. Freepatentsonline.com (2005-08-29). Retrieved on 2010-02-08.

^ Blanketing atmosphere for molten aluminum-lithium or pure lithium - Patent EP0268841. Freepatentsonline.com. Retrieved on 2010-02-08.

^ Argon-Carbon Dioxide Mixtures - Praxair's StarGold and Mig Mix Gold Blends. Praxair.com. Retrieved on 2010-02-08.

^ Shielding Gases for Gas Metal Arc Welding (GMAW). Prest-o-sales.com. Retrieved on 2010-02-08.

^ Shielding gas cross-reference chart

^ Cary and Helzer, p 12325

Further reading

Cary, Howard B. and Scott C. Helzer (2005). Modern Welding Technology. Upper Saddle River, New Jersey: Pearson Education. ISBN 0-13-113029-3.

v  d  e

Metalworking

 

Welding

Arc welding

Atomic hydrogen  Gas metal (MIG/MAG)  Flux-cored  Gas tungsten (TIG)  Plasma  Shielded metal (MMA)  Submerged arc

Other processes

Electrogas  Electron beam  Electroslag  Forge  Friction  Friction stir  Friction stud  Laser beam  Laser-hybrid  Oxyfuel  Resistance  Spot  Ultrasonic

Equipment

Power supply  Electrode  Filler metal  Shielding gas  Robot  Helmet

Related terms

Heat-affected zone  Weldability  Residual stress  Arc eye

Casting  Fabrication  Forming  Jewellery  Machining  Metallurgy  Smithing  Tools & Terminology  Welding

Categories: Arc welding | WeldingHidden categories: Articles needing additional references from January 2010 | All articles needing additional references
About the Author

I am a professional editor from
China Suppliers
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http://www.frbiz.com/ contain a great deal of information about

cork board strips
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red cedar lumber

welcome to visit!

Anybody in here know anything about mig welding?What brand name mig welder to buy and what size?

Im gonna start trying to weld my own stuff instead of paying people to do it.The welder will need to be easily portable and it will need to be heavy duty/reliable enough to weld on cars and trucks.
It also may be used to weld on semi trucks once in a great while as well.

What size do i need and whats a good name brand without "breaking the bank"? I would like to keep it a 115 volt if possible since its easier to find a 115 outlet when going places.

I'm sure your probably gonna say the "Miller" brand but is Miller actually so good as to pay an extra few hundred bucks just for the name compared to Lincoln,Century and a few others?Opinions anyone?

I was in the same spot a few years ago. I did all my research and came up with Hobart.

Hobart is made by miller, uses miller parts, has a few less bells and whistels than the millers, but has everything to get the job done..

140 amps or so is the biggest welder you will get to run on 115 volts.

That's what I picked, horbart handler 140 mig

It will weld up to about 1/4" thick steel in a single pass.

Hobarts has a Manufacturer Warranty of 5 years..

Price wise it aint too bad. $460 with free shipping from northern tools
http://www.northerntool.com/webapp/wcs/stores/servlet/product_6970_200306073_200306073

During my research I was also looking at clarke brand as well which is an off brand but seems pretty good. My reason for not going with the clarke was due to my age and how long I will be welding. I have quite many years ahead and I know 15 years from now if I need a part for a hobart welder, it will be easy to find..

Clarke, probbly not.

Now you will still need to argon bottle.. I bought a large bottle (80 cu ft) but mine is pretty much shop use, rolled around shop and yard.. If your wanting mobil use then I would get a couple of smaller bottles so it will be easier to move, haul, etc.

You'll also need a welding mask (I recommend a auto darkening mask, I'm using a harbor freight $50 one myself and it works great)

Welding gloves (again harbor freight, 3 pairs for $10)

Also be sure to get a real mig (needs sheilding gas) not a flux core gassless welder.

You may want to buy or make a welding cart too. I made my own from 1x1" square tube, sheet metal, and some cheap wheels and casters from harbor freight
Now if your not doing ALOT of welding the clarke package deals from welding depot might be a good option for you
http://store.weldingdepot.com/cgi/weldingdepot/scan/fi=products/st=db/sp=results/co=1/sf=category/se=Mig%20Welders%20110%20Volt/op=eq/nu=0/bs=1/ml=15/tf=description/to=x/se=1/sf=inactive/op=ne/sf=tax_category/se=1/op=eq/va=banner_text=/va=banner_image=.html

This is a nice clarke package deal for $480
http://store.weldingdepot.com/cgi/weldingdepot/WE6523P-8.html
130 amp welder, auto darkening mask, gas reg, welding cart and a 20 cu ft bottle

Lincoln Electric Introduces New Portable AC Welder/Generator
Lincoln Electric has introduced the new Bulldog™ 140 portable welder/generator for homeowners, farmers, ranchers and small contractors who require welding and AC generator power in one portable unit.

Thanks for visiting!

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