Do you know the welding positions indicated by the following symbols? A, B, C, D, E, F, G, H, J, L 1, 2, 3, 4, 5, 6 F and G PD 2G, 4G and 4F Perhaps it was too easy for you, or perhaps you’re still not sure about the answer. Never mind, here’s the correct answer (Part I), as well as introduction to symbols (part II) and the chart data (Part III). （Part I）The Answer： A, B, C, D, E, F, G, H, J, and L are letters used in ISO standards to denote specific positions and orientations. 1, 2, 3, 4, 5, and 6 indicate the position’s orientation, with higher numbers generally representing more complex positions. F denotes a fillet weld, and G

How Inverter Welding Machines Work Inverter welding machines rely on powerful electronic switches to control the flow of electricity. The most common types use IGBT (Insulated Gate Bipolar Transistors) as switches. These are known as IGBT inverter welding machines. When welding, the circuit stays closed, meaning the current flows evenly throughout the entire circuit. However, the resistance isn’t the same everywhere. The biggest resistance typically comes from the contact points, especially where the electrode touches the metal. This is known as contact resistance, and it’s the spot where most of the heat is generated, according to Joule’s Law (Q = I²Rt). In simple terms, where the resistance is high, the heat increases. The electrode (usually an alloy with a low melting point) melts quickly in

To keep natural gas in a liquid state, it needs to be stored at a temperature of -163°C during transportation. But, if regular metals are exposed to such low temperatures, they can crack from the cold. That’s why scientists discovered invar steel, a material that has become essential for LNG ships. Invar steel (also called invar alloy) is a mix of nickel, iron, and a small amount of carbon. This metal has a very low thermal expansion rate, meaning it doesn’t expand or contract much with temperature changes. Because of this, it stays stable even at extreme temperatures, making it perfect for LNG ships. The hardest part of building an LNG ship is welding invar steel to create a storage tank for natural gas. Invar

Due to the wide range and high cost of stainless steel products, most of them need to be customized. However, during the customization process, various challenges often arise. Poor quality materials: Common stainless steel materials are typically classified as 201 and 304, with a price difference of almost 50%. Insufficient material thickness: If the required thickness is 1.0mm, manufacturers might use 0.85mm instead. Welding issues: Welding can be either spot welding or full welding. Full welding, while stronger, is more expensive. Electroplating color variation: The color of stainless steel plates can vary between batches. Transportation problems: Finished products are often damaged during transportation and are difficult to repair. So, how can these problems be effectively addressed? – Material quality: Whether it’s 201 or 304 stainless

Allied Market Research has released a report on the global aluminum welding market size by 2030. Three points are mentioned: The report provides forecasts from three perspectives: 1. Classification of welding wire types (pure aluminum welding wire, aluminum-magnesium alloy welding wire, and aluminum-silicon alloy welding wire) 2. Classification by technology (arc welding and gas metal arc welding (MIG), gas tungsten arc welding (TIG), torch welding, laser beam welding, electron beam welding, resistance welding and others) 3. Classification by end use (automotive, aerospace, marine, construction and others) Three forecasts are given, from now until 2030: 1. Aluminum-magnesium alloy welding wire will dominate the market: This type of welding wire has excellent corrosion resistance, high strength and good weldability, so it is very suitable for use in

The following types of welding rods are commonly used at home or at work to provide repairs, fabricate structures, and carry out small-scale engineering. They are used by people all over the world. 6010 Stick Welding Electrodes 6010 rods are Fast Freeze electrodes, meaning they cool quickly and prevent the weld pool from becoming too hot. This makes them ideal for thin beads with deep penetration. They’re great for welding over rust and dirt, so you don’t need to clean your material first. Keep in mind, 6010 rods only work with Direct Current Electrode Positive (DC+). 6011 Stick Welding Electrodes The 6011 is similar to the 6010, also a Fast Freeze electrode. It’s excellent for root passes and pipe welding, with a smaller weld pool