Shielding Gas
Guide For Centrashield Mixes: GMAW FCAW GTAW
FCAW Weld Parameters
| AWS Class | Mix No. | CFH | Wire Dia. | Current | Voltage | LBS/Hr. | %Efficiency | Uses |
|---|---|---|---|---|---|---|---|---|
| E71T – 1 | 6 & 8 | 30 | .035 | 130-280 | 20-30 | 3-9 | 86 | Mild & Med Carbon Steel,
All position can be used, Over normal rust and mill scale, No porosity |
| E71T – 1 | 6 & 8 | 30 | .045 | 150-290 | 23-30 | 5-10 | 87 | “ |
| E71T – 1 | 6 & 8 | 35 | .052 | 180-310 | 24-32 | 5-10 | 87 | “ |
| E71T – 1 | 6 & 8 | 35 | 1/16 | 180-400 | 25-34 | 5-12 | 87 | “ |
| Metal Core E70C-6M | 6 & 8 | 30 | .035 | 130-280 | 23-29 | 4-9 | 92 | No slag,
Excellent welding, Good bead appearance, Spray type transfer, All positions, Excellent for robotic welding |
| Metal Core E70C-6M | 6 & 8 | 30 | .045 | 150-350 | 24-30 | 8-12 | 95 | “ |
| Metal Core E70C-6M | 6 & 8 | 35 | .052 | 200-400 | 26-32 | 8-12 | 93 | “ |
| Metal Core E70C-6M | 6 & 8 | 35 | 1/16 | 300-500 | 26-32 | 9-16 | 96 | “ |
| E75T-5 | 8 | 35 | 1/16 | 160-350 | 22-32 | 7-14 | 92 | Good Impacts,
Resists Cracking. |
| E91T1-D1 | 8 | 35 | 1/16 | 180-300 | 21-28 | 5-12 | 92 | For 100,000 LB. Tensile |
| E80T1-Ni2 | 8 | 35 | 5/64 | 200-400 | 23-27 | 5-10 | 87 | Excellent for position. |
Guide To AWS Classification
| E | X | X | T/C | X | X |
|---|---|---|---|---|---|
| Electrode | Minimum Tensile x 10,000 PSI | 0=Flat&Horizontal
1=All position |
Indicates a flux cored electrode | Usability and performance | Chemical composition of
the deposited weld metal |
GTAW Weld Parameters
| Material | Mix | Uses, Results | Current | Amperage | CFH | Elect. Dia. | Gas Cup Dia. |
|---|---|---|---|---|---|---|---|
| Alum. 1/16 | 1 | Manual, Good Arc Start | AC | 55 | 15-20 | 1/16 | 3/8 |
| Alum. 1/8 | 1&2 | No. 2 Higher Speed | AC | 110 | 20 | 3/32 | 7/16 |
| Alum. 3/16 | 2&3 | No.3 Better Weld Quality | AC | 150 | 25 | 1/8 | 7/16 |
| Copper 3/16 & Less | 2&3 | Better Travel Speed | DCSP | 180-250 | 20-30 | 3/32-1/8 | 3/8&7/16 |
| Sil. Bronze 1/16 | 1 | Penetration. Flat Bead | DCSP | 60-90 | 10-15 | 1/16 | 3/8 |
| Sil. Bronze 1/8 | 1&2 | No. 2 Speed and Wetting | DCSP | 100-140 | 10-15 | 1/16-3/32 | 3/8 |
| Titanium* | 1 | Better Performance | DCSP | 150-200 | 15-20 | 1/16-3/32 | 3/8&7/16 |
| Magnesium | 1 | Good Penetration | AC | 50-100 | 12 | 1/16-3/32 | 3/8 |
| Magnesium | 1&2 | Shallow penetration | DCRP | 75-125 | 12 | 1/16-3/32 | 3/8 |
| Magnesium | 2 | Deep Penetration | DCSP | 75-160 | 15 | 1/16-3/32 | 3/8&7/16 |
| Nickel Alloys | 1&11 | Hot Arc, Smooth Bead | DCSP | 90-150 | 10-20 | 1/16-3/32 | 3/8 |
| S. Steel 1/16 | 1 | Fast Arc Start | DCSP | 70-110 | 12 | 1/16 | 3/8 |
| S. Steel 1/8 | 11 | More Heat, Fast Speed | DCSP | 65-105 | 12 | 1/16 | 3/8 |
| S. Steel 3/32+ | 11&12 | Speed Penetration, Color | DCSP | 90-150 | 12-18 | 1/16-3/32 | 3/8&7/16 |
CENTRASHIELD (+ 1% Consistency)
| No. | Application | Mix |
|---|---|---|
| 1 | GTAW (All Metals), GMAW (AI & Cu) | 75 AR 25 He |
| 2 | GTAW – GWAM Al. 3/4″ – 1-1/14″, Cu 1/2″ – 3/4″ | 50 Ar 50 He |
| 3 | GTAW – GMAW, Al. 1/4″- Up”, Cu 3/4″q – 1-1/4″ | 25 Ar 75 He |
| 4 | GMAW – Spray, Steel & Stainless Steel | 98 Ar 2 O2 |
| 5 | GMAW – Spray, Steel & Stainless Steel | 95 Ar 5 O2 |
| 6 | GMAW – FCAW, S.C.R./Spray | 90 Ar 10 CO2 |
| 7 | GMAW – FCAW, S.C.T. & Mod. Globular | 85 Ar 15 CO2 |
| 8 | GMAW – FCAW, S.C.T. & Mod. Globular | Ar 25 CO2 |
| 9 | GMAW – Stainless S.C.T./Spray | Tri-Mix/90 He. 7.5 Ar, 2.5 CO2 |
| 11 | GTAW- Stainless, Manual | 97.5 AR 2.5 HY |
| 12 | GTAW- Stainless, Automatic | 95 AR 5 HY |
| 20 | GMAW – Stainless S.C.T./Spray/Pulse | Tri-Mix 81 AR 18 HE 1 CO2 |
| 23 | GMAW – FCAW, Mild Steel | 91 Ar, 4 O2, 5 CO2 |
| Base Metal | Shielding Gas | Metal Transfer, GMAW | Remarks |
|---|---|---|---|
| Aluminum and Aluminum alloys (Al) | CentraShield1 | S.C.T | All position welding DCEP helps remove surface oxides |
| Aluminum and Aluminum alloys (Al) | CentraShield2 | Modified Spray | Al. Mg 1/4″ |
| Aluminum and Aluminum alloys (Al) | CentraShield3 | Modified Globular | Al. Mg 1/2″ – 1″ thickness |
| Aluminum and Aluminum alloys (Al) | CentraShield4 | Globular | Al. Mg over 1″ thickness |
| Copper and Copper Alloys All Bronze | CentraShield1 | S.C.T | Up to 1/8″ thickness, good wettability |
| Copper and Copper Alloys All Bronze | CentraShield2 | Modified Spray | Good penetration, good wettability, to 1/4″ |
| Copper and Copper Alloys All Bronze | CentraShield3 | Modified Globular | Higher heat input; to 3/4″ metal |
| Copper and Copper Alloys All Bronze | CentraShield4 | Globular | Excellent heat spread; for 3/4″ and over |
| Magnesium and Magnesium Alloys (Mg) | CentraShield1 | Modified Spray | Mg to 1/4″ thickness; good wettability |
| Magnesium and Magnesium Alloys (Mg) | CentraShield2 | Modified Globular | Mg to 1″ thickness; high heat input |
| Magnesium and Magnesium Alloys (Mg) | CentraShield3 | Globular | Highest energy input to weld; min. porosity |
| Nickel, Monel, Inconel | CentraShield1 | Modified Spray | Wider arc column; greater heat input |
| Nickel, Monel, Inconel | CentraShield2 | Modified Globular | Greater heat input; more fluid weld pool; less porosity |
| Low Alloy Steel | CentraShield4 | Spray | 1/6″ – 1/4″ thickness; narrow HAZ; very good horizontal and flat filler profiles. |
| Low Alloy Steel | CentraShield5 | Spray | 1/6″ – 1/4″ thickness; narrow HAZ; very good horizontal and flat filler profiles. |
| Low Alloy Steel | CentraShield6 | S.C.T./Modified Spray | Greater heat energy input to weld, very good wettability; no undercutting at toes. |
| Low Alloy Steel | CentraShield7 | S.C.T./Modified Globular | Greater heat energy input to weld, very good wettability; no undercutting at toes. |
| Low Alloy Steel | CentraShield8 | Short Circuit | Stable arc; excellent mechanical properties. |
| Low Alloy Steel | CentraShield23 | S.C.T./Spray Transfer | Deeper penetration; good surface finish. Excellent weld pool control; all positions. Fast travel speeds in spray mode. |
| Mild Steels | CentraShield5 | Spray | Fluid weld pool, good penetration, high physical properties; good wettability |
| Mild Steels | CentraShield6 | S.C.T./Modified Spray | Good arc stability; penetration very good; fast welding speeds. |
| Mild Steels | CentraShield7 | S.C.T./Modified Globular | Minimum splatter; sounds weld quality; high mechanical properties |
| Mild Steels | CentraShield8 | Short Circuit | All position welding; excellent pool control; surface appearance very good. |
| Mild Steels | CentraShield23 | S.C.T./Spray Transfer | Advanced gas for semiautomatic and automatic GMAW of mild steel, in flat as well as in all position welding |
| Stainless Steel | CentraShield4 | Spray | Very good welding flat, horizontal and overhead with electrodes dia. 0.045″ and less. |
| Stainless Steel | CentraShield5 | Spray | For electrodes 1/6″ dia. and larger, flat and horizontal fillets; flat groove welds. |
| Stainless Steel | CentraShield9 | Modified Spray
Short Circuit |
Excellent for flat and horizontal fillets, deep penetration, excellent appearance.
Designed for short circuit transfer on 300 series stainless steels; no corrosion resistance problems; narrow HAZ; minimum undercutting and distortion, excellent for multipass stainless steel pipe welds. |
| Stainless Steel | CentraShield20 | S.C.T., Spray
Pulse Spray |
Designed for S.C.T., spray or pulsed spray to give high deposition and excellent color.
Welding speeds average 4 IPM faster than Argon/Oxygen shielding. |
