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Argon Carbon Dioxide blends are versatile mixtures for welding carbon, low-alloy and some stainless steels. Increasing the CO2 content will increase weld penetration and bead wetting characteristics. At higher current levels and CO2 content, increased spatter may result. Argon Carbon Dioxide blends can be used to join a wide range of material thickness while utilizing a variety of modes of metal transfer.

Principal Applications
Argon Carbon Dioxide blends are used for all kinds of structural steel, farm implements and machinery. Lower levels of CO2 can be used for pulsed arc or spray arc welding, while higher levels > 20% are used for short arc welding and the shielding of some flux-cored wires.

 

The Key To Increased Welding Productivity And Profits

Looking for the key to consistent welds under the most challenging situations? Look to Praxair® StarGold™ argon-based shielding gases. Our argon-based family of blends is available for top-quality welding in a variety of precision formulations. Praxair StarGold blends are also designed to meet your specific Gas Metal Arc Welding (GMAW or MIG/MAG) application requirements. See Brochure.

 

Mixture Composition % Cylinder Style Volume (ft3) Pressure (psig) Part Number More Information
Ar
CO2
StarGold™ C-5 95 5 T
K

338
252

2,640
2,200
AR STAR7-T
AR STAR7-K

StarGold™ C-5 for All Forms of GMAW of Stainless Steel

StarGold™ C-10 90 10 T
K
348
258
2,640
2,200
AR STAR9-T
AR STAR9-K

StarGold™ C-10 and C-20 for Conventional Spray GMAW

C-5 and C-10 for Conventional and Pulsed Spray GMAW

StarGold™ C-15 85 15 T
K
357
264
2,640
2,200
AR STAR10-T
AR STAR10-K
 
StarGold™ C-20 80 20 T
K
368
272
2,640
2,200
AR STAR13-T
AR STAR13-K

StarGold™ C-10 and C-20 for Conventional Spray GMAW

C-20 and C-25 for Short Circuiting GMAW and FCAW

StarGold™ C-25 75 25 T
K
381
280
2,640
2,200
AR STAR14-T
AR STAR14-K

C-20 and C-25 for Short Circuiting GMAW and FCAW

 

StarGold C-5 Gas Blend

This blend is used for pulsed spray transfer and short-circuiting transfer on a variety of material thicknesses. A 5% mixture may be used for GMAW-P of low alloy steels for out-of-position welding. The arc forces that develop give this mixture more tolerance to mill scale and a more controllable puddle than an argon-oxygen blend.

StarGold C-10 Gas Blend

This blend performs similarly to the StarGold C-5, but with increased heat input providing a wider, more fluid weld puddle in either short-circuit or spray transfer.

StarGold C-15 Gas Blend

This blend has been used for a variety of applications on carbon and low-alloy steels. In the short-circuit mode of transfer, maximum productivity on thin gauge metals can be achieved with this blend. This is done by minimizing the excessive melt-through tendency of higher carbon dioxide mixes, while increasing deposition rates and travel speeds. As the carbon dioxide percentages are lowered from the 20% range (maximum spray arc levels), improvements in deposition efficiency occur due to decreasing spatter loss. This blend will support the spray arc mode of transfer.

StarGold C-20 Gas Blend

May be used for short circuiting or spray transfer welding of carbon steel.

StarGold C-25 Gas Blend

This blend is commonly used for GMAW with short-circuiting transfer on low carbon steel. It was formulated to provide optimum droplet frequency on short-circuiting transfer using .035 and .045 diameter wire. Praxair's StarGold C-25 operates well in high current applications on heavy base metal. It promotes good arc stability, weld pool control, and weld bead appearance. This blend will not support the spray type mode of metal transfer.

StarGold C-40 Gas Blend

This mixture is recommended for some flux-cored wires where improved arc stability and reduced spatter levels and offers improved welding penetration when compared to the StarGold C-25 mixture are desirable.

StarGold C-50 Gas Blend

Is often used for short arc welding of pipe, particularly when other contaminants are present in the surfaces to be welded.

Mig Mix Gold Gas Blend

This blend performs similarly to the StarGold C-5, but with increased heat input providing a wider, more fluid weld puddle in either short-circuit or spray transfer.