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E71T-11 and E71T-GS both belong to AWS A5.20 carbon steel self-shielded flux-cored welding wire (FCAW-S). They do not require external shielding gas and are very suitable for outdoor or gasless environment operations. They are usually welded with DCEN (DC reverse: wire negative electrode). Howe...Read more »
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The rainy season presents unique challenges for welding operations. High humidity, condensation, and moisture ingress are not just discomforts—they are direct threats to weld integrity. Moisture introduced into the weld zone can lead to hydrogen-induced cracking, porosity, and embrittlement. Ad...Read more »
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There are two most basic and easily confused types of welding rods in manual arc welding: acidic welding rods (such as AWS E6013) and alkaline low-hydrogen welding rods (such as AWS E7018). Many welders can’t tell when to use acidic and when to use alkaline. Choosing the wrong welding rod ...Read more »
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The thermal conductivity of copper and copper alloys is more than 5 times that of carbon steel. Welding is prone to pores, lack of fusion, and thermal cracks. The selection of welding wire directly determines the conductivity, corrosion resistance, and wear resistance of the weld. Based on the...Read more »
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In GMAW (gas metal arc welding) practice, horizontal welding is a position that many beginners have mixed feelings about. It’s easier than vertical or overhead welding, but if parameters and technique are wrong, the weld tends to “drip” (sag) or show undercut. The primary chal...Read more »
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I. What is welding arc blow? Welding arc blow refers to the phenomenon that the arc deviates from the original axis direction of the electrode or electrode during the welding process, which will directly destroy the stability of the arc, affect the weld shape and welding quality, and even ca...Read more »
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Many welding problems that show up on the shop floor—poor bead appearance, porosity, cracking—are often traced back to one overlooked factor: how the consumables were stored before they ever reached the welder’s hand. For fabrication shops, construction sites, and manufacturing facilitie...Read more »
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One of the most frustrating moments for a beginner welder is striking an arc only to have the electrode stick to the workpiece. It sticks, glows red, and you scramble to twist it free. Don’t worry — every welder has been there. Understanding why it sticks and how to start the arc properly will s...Read more »
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When welding 6061 aluminum and its alloys with AC/DC TIG welding machines, ER4043 (Al-Si5) and ER5356 (Al-Mg5) are the two most commonly used filler wires. Although both wires look silver-white, they are fundamentally different in composition and performance. They have clear differences in allo...Read more »
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I Welding Arc Stability AC Welding: The stability of AC arc is relatively poor. The direction of the alternating current changes periodically, and the arc will extinguish and re-ignite when the current crosses zero. This causes the arc to easily flicker and be intermittent. Example When usi...Read more »