Three common MIG welding defects are Porosity (trapped gas bubbles), Lack of Fusion (weld metal doesn't bond to base metal), and Burn-through (melting a hole through thin metal), all typically caused by incorrect settings, poor technique, or contamination. These flaws weaken the weld, compromising structural integrity.
Typical internal defects are porosity, slag inclusions, lack of fusion, burn-through, and hot and cold cracks. Internal defect: porosity. Keep in mind that both surface irregularities and weld discontinuation can compromise the integrity of the weld, but internal welding defects are considered more dangerous.
We can break down weld defects into the following main categories:
"G" stands for "groove weld," and the number indicates the position: 1G (flat), 2G (horizontal), 3G (vertical), 4G (overhead), 5G (pipe horizontal, fixed), and 6G (pipe at 45° angle, fixed), with 6G being the most challenging. These positions are used to test and certify welders' skills.
The 3G welding position, or vertical position, refers to welding a workpiece positioned vertically, with the weld joint running vertically as well.
1G was analog and focused on voice. 2G introduced digital transmission and data services. 3G brought increased speeds and applications like video calling. 4G will provide speeds from 100 Mbps to 1 Gbps for broadband access anywhere.
Yes, you absolutely can make $100,000 a year welding, but it usually requires specialization, advanced skills, experience, and often travel or hazardous conditions, with roles like pipeline or underwater welding offering the highest potential, though even general welders can reach this with hustle, owning equipment, and working in high-demand areas. Entry-level pay is lower, but significant growth is possible, with top earners exceeding six figures through dedication and strategic career moves.
The three most common welding types are – Arc, MIG and TIG welding. Let's take a closer look and discuss some similarities and differences between them. Arc welding also referred to as stick welding is the oldest of the three and probably the most cost efficient.
The American Welding Society (AWS) recognizes 5 basic types of weld joints:
We decided to simply break down the five types of welding and why you might choose one over the other.
Health hazards from welding, cutting, and brazing operations include exposures to metal fumes and to ultraviolet (UV) radiation. Safety hazards from these operations include burns, eye damage, electrical shock, cuts, and crushed toes and fingers.
When welded metal starts to warp or change shape, it's called distortion. Poor clamping, uneven heating or improper sequencing are common culprits.
MIG welding can make welders sick. They can have short-term effects like metal fume fever or long-term effects like Manganism and cancer. Without proper ventilation, it is never safe to MIG weld, especially indoors, let alone in confined spaces where fume concentration rises to dangerous levels.
There are 4 main types of welding. Each with its own unique properties and applications. The four types of welding are gas metal arc welding (GMAW), flux-cored wire-arc welding (FCAW), shielded metal arc welding (SMAW) and gas tungsten arc welding (GTAW).
Gas metal arc welding (GMAW), sometimes referred to by its subtypes metal inert gas (MIG) and metal active gas (MAG) is a welding process in which an electric arc forms between a consumable MIG wire electrode and the workpiece metal(s), which heats the workpiece metal(s), causing them to fuse (melt and join).
Over 200 IAF pilots have been killed in MiG-21 accidents since 1970. These accidents have also resulted in the deaths of over 40 civilians. It's no wonder these jets have assumed grim tags such as the 'flying coffin' and the 'widow maker'.
TIG welded joins are typically stronger than those produced by MIG welding. This is because the narrow, focused arc created by TIG welders offers better penetration of the metal. In addition, the TIG weld beads, when applied correctly, contain few holes and other defects that can weaken the weld.
Welders' salary often depends on skill level, certifications, and experience, but with the right welding training program, professionals can unlock high-earning potential in this field. However, it'd be a mistake to believe that this profession could easily lead to millionaire status.
9 jobs that pay $100K per year without a degree
Exposure to harmful fumes and gases
Even in open spaces, over time, exposure to carcinogens like hexavalent chromium, cadmium, beryllium, nickel, arsenic, and substances causing neurological damage, such as manganese, can shorten a welder's life.
1G: Flat position — the easiest and most common. 2G: Horizontal position — weld runs along a vertical plate. 3G: Vertical position — weld moves upward or downward. 4G: Overhead position — weld performed from below the joint. 5G: Horizontal Fixed Position, horizontal axis — no pipe rotation.
Most 1G networks were decommissioned by the early 2000s, though some persisted longer in remote or developing regions. The last known operational 1G service, in Russia, closed in 2017.
Key contrasts: 1. Speed: 7G is supposed to be 50-100 times quicker than 5G.