Characteristics of acidic welding electrodes

Acidic welding electrodes are characterized by stable arc, low spatter, easy slag removal, and aesthetically pleasing weld formation. However, the weld metal has poor plasticity, toughness, and crack resistance. Specifically:

Good process performance: Stable arc, suitable for both AC and DC welding, good slag fluidity, low spatter, aesthetically pleasing weld formation, and easy slag removal.
Insensitive to rust and oil: Strong oxidizing properties during welding can, to some extent, counteract the effects of hydrogen in rust or oil, reducing porosity sensitivity.
Poor crack resistance: The weld metal has a high oxygen content and significant loss of alloying elements, resulting in poor plasticity and toughness, and weaker crack resistance compared to basic welding electrodes.
Wide range of applications: Suitable for welding general structural steel, such as flat and fillet welding of ordinary carbon steel and low-alloy steel.

Common types of acidic welding electrodes mainly include the E43 series and E50 series, with specific models as follows:

1. E43 Series
E4303 (J422): Titanium-calcium type acidic welding electrode, suitable for all-position welding of low-carbon steel structures, supports both AC and DC welding.
E4301: Iron oxide type acidic welding electrode, mainly used for fillet welding.
E4322: Ilmenite type acidic welding electrode, suitable for welding low-carbon steel structures, supports both AC and DC welding.
2. E50 Series
E5003 (J502): Titanium-calcium type acidic welding electrode, suitable for welding medium-carbon steel and low-alloy steel, supports both AC and DC welding.
3. Other Common Models
J807: Acidic welding electrode, suitable for welding high-strength steel workpieces.
HS115: Cobalt-based welding wire surfacing acidic welding electrode, with good thermal fatigue resistance, suitable for applications in petroleum and other industries.