"Awg vs Swg: Same or Different?
Like AWG, SWG assigns numerical values to wire thickness, but the scale differs, as does the wire diameter for each gauge. Key Characteristics of SWG. SWG sizes...
Understanding AWG and SWG: Are They the Same?
In the world of welding, two terms often used to describe the size of welding electrodes are AWG and SWG. While both are used to measure the gauge of a wire, they are not the same. This article aims to clarify the differences between AWG and SWG, helping you make informed decisions when selecting welding electrodes.
AWG: American Wire Gauge
The American Wire Gauge (AWG) system is a standard used primarily in North America to measure the diameter of non-ferrous wires. It was established in 1857 and has since been widely adopted. AWG sizes range from 0000 (the largest) to 40 (the smallest).
In the AWG system, as the gauge number increases, the wire diameter decreases. This means that a 12 AWG wire is thicker than a 16 AWG wire. The formula to calculate the diameter of an AWG wire is:
Diameter (inches) = (36 - 2 * AWG) / 36
SWG: Standard Wire Gauge
The Standard Wire Gauge (SWG) system is used in the United Kingdom and some other Commonwealth countries. It was established in 1884 and is still used today. SWG sizes range from 0 (the largest) to 40 (the smallest).
Unlike the AWG system, in SWG, as the gauge number increases, the wire diameter also increases. This can lead to confusion when comparing SWG and AWG wires. The formula to calculate the diameter of an SWG wire is:
Diameter (millimeters) = (25.4 * (36 - 2 * SWG)) / 36
Comparing AWG and SWG
As you can see, the AWG and SWG systems have opposite trends in their gauge numbers. This can make it challenging to compare wires of the same gauge from both systems. For example, a 12 AWG wire has a larger diameter than a 12 SWG wire.
To compare AWG and SWG wires, you can use the following table:
| SWG | AWG |
|---|---|
| 0 | 0000 |
| 1 | 000 |
| 2 | 00 |
| 3 | 0 |
| 4 | 1 |
| 5 | 2 |
| 6 | 3 |
| 7 | 4 |
| 8 | 5 |
| 9 | 6 |
| 10 | 7 |
| 11 | 8 |
| 12 | 9 |
| 13 | 10 |
| 14 | 11 |
| 15 | 12 |
| 16 | 13 |
| 17 | 14 |
| 18 | 15 |
| 19 | 16 |
| 20 | 17 |
| 21 | 18 |
| 22 | 19 |
| 23 | 20 |
| 24 | 21 |
| 25 | 22 |
| 26 | 23 |
| 27 | 24 |
| 28 | 25 |
| 29 | 26 |
| 30 | 27 |
| 31 | 28 |
| 32 | 29 |
| 33 | 30 |
| 34 | 31 |
| 35 | 32 |
| 36 | 33 |
| 37 | 34 |
| 38 | 35 |
| 39 | 36 |
| 40 | 37 |
Which System to Use?
When selecting welding electrodes, it's essential to know which system your supplier uses. If you're unsure, ask for the wire diameter in millimeters to avoid any confusion. Using the wrong gauge wire can lead to poor weld quality or even damage to your welding machine.
In conclusion, while both AWG and SWG are used to measure the gauge of welding wires, they are not the same. Understanding the differences between these two systems can help you make informed decisions when selecting welding electrodes, ensuring optimal weld quality and machine safety.
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