When performing TIG butt welding on mild steel (low-carbon steel) using the OTC DAIHEN T500P welding machine, precise parameter matching is the key to ensuring optimal weld penetration and an aesthetic bead profile. This article compiles standard parameter references for various plate thickness combinations, including tungsten electrode diameter, welding current, filler wire diameter, and argon gas flow rate.
I. T500P Mild Steel TIG Butt Weld Parameter Reference Table
Please find the corresponding recommended welding conditions in the table below based on your actual plate thickness combination (Plate Thickness ① and Plate Thickness ②):
| Plate Thickness ① (mm) |
Plate Thickness ② (mm) |
Tungsten Electrode Dia. (mm) |
Welding Current (A) |
Filler Wire Dia. (mm) |
Argon Gas Flow (L/min) |
|---|---|---|---|---|---|
| 0.8 | 1.0 | 1.6 | 25 | 0 | 5~7 |
| 1.2 | 1.6 | 30 | 0 | 5~7 | |
| 1.6 | 1.6 | 40 | 0 | 6~8 | |
| 2.3 | 2.4 | 55 | 0 | 7~9 | |
| 1.0 | 1.2 | 1.6 | 35 | 0 | 5~7 |
| 1.6 | 2.4 | 50 | 0 | 6~8 | |
| 2.3 | 2.4 | 65 | 0 | 6~8 | |
| 3.2 | 2.4 | 75 | 1.6 | 6~8 | |
| 1.2 | 1.6 | 2.4 | 60 | 1.6 | 6~8 |
| 2.3 | 2.4 | 70 | 1.6 | 6~8 | |
| 3.2 | 2.4 | 80 | 1.6 | 6~8 | |
| 1.6 | 2.3 | 2.4 | 80 | 2.4 | 6~8 |
| 3.2 | 2.4 | 100 | 2.4 | 6~8 | |
| 4.5 | 2.4 | 110 | 2.4 | 6~8 | |
| 2.3 | 3.2 | 2.4 | 110 | 2.4 | 6~8 |
| 4.5 | 2.4 | 125 | 2.4 | 6~8 | |
| 6.0 | 2.4 | 140 | 2.4 | 6~8 | |
| 3.2 | 4.5 | 2.4 | 145 | 2.4 | 6~8 |
| 6.0 | 2.4 | 160 | 2.4 | 7~9 | |
| 4.5 | 6.0 | 3.2 | 210 | 2.4 | 9~11 |
* Note: If you encounter conditions similar to the table above in actual welding, you can prioritize these parameter settings as a baseline and fine-tune them based on the on-site weld pool conditions. If you have better practical experience, feel free to share and communicate with us!
II. Download T500P Manual & Get Technical Support
To gain a deeper understanding of the equipment’s hidden features and advanced settings, we strongly recommend consulting the full official manual. You can head directly to our Download Center to get the original OTC DAIHEN T500P welder manual.