10 Fun Welding Facts You Didn't Know

Table of Contents > 1. 10 Interesting Welding Facts That Will Blow Your Mind     1.1  First traces of welding date back to the Bronze Age     1.2 The arc can get hotter than the Sun     1.3 You can weld in space, and similar metals can even weld themselves         1.3.1 Cold Welding in Space     1.4 You can weld deep underwater     1.5 There are over 70 different welding processes, but we are only using a few     1.6 Welding faces a significant shortage of skilled workers     1.7 Welding accounts for the 50% of the world's manufactured structures     1.8 The first-ever industrial robot was used for welding     1.9 Welding robots can reach speeds up to 60 ft. per minute     1.10 You can use sound or explosions to make welds 2. Conclusion 3. 🧐 10 Fun Welding Facts You Didn't Know

Welding is more than just a simple trade. If we look more closely at history, we see that welding has driven innovation, enabling many breakthroughs. From the bottom of the ocean to outer space, welding is everywhere.

But welding and welders are often overlooked. According to experts, professional welding and state-of-the-art methods account for nearly 50% of all products in the US.

To celebrate the art of welding, we compiled a list of 10 fun welding facts you didn't know. Welding has been so essential that some facts are really mind-blowing.

10 Interesting Welding Facts That Will Blow Your Mind

From a simple method for joining two metal pieces into one, welding has come a long way. Although often under the radar, welding during development and implementation has left many people speechless.

Here are 10 fun and interesting facts about welding that not many welders know. Whether you are a beginner, a seasoned welder, or a professional, these facts reveal some of the most fascinating aspects of the trade.

1. First traces of welding date back to the Bronze Age

Welding is much older than you think. The earliest traces of welding date back to the Bronze Age, and it is associated with the discovery of new metals.

Looking at history, the development of humankind was closely tied to the use of metals. The discovery of copper, bronze, silver, gold, and iron changed the way people ate, cultivated the land, and hunted. New metals were much stronger and more reliable, but they often needed reshaping.

Approximately 2000 B.C., people overlapped the two pieces and used heat, pressure, and hammering to form a bond. The earliest forms of shaping metal into small gold boxes, jewelry, dining utensils, and weapons are credited with being the earliest forms of welding.

First Traces of Metalworking
Image by Inverse

Metal shaping and bonding persisted throughout ancient times and became crucial in the Middle Ages. The blacksmiths forged and maintained weapons and armor, making them essential to this age.

But the welding as we know it today didn't emerge until the 19th century. In 1800, Sir Humphrey Davy invented the electric arc, but it was not until 1881 that Auguste de Meritens used the arc's heat to join lead plates for storage batteries, marking the birth of modern welding.

2. The arc can get hotter than the Sun

Arc welding methods rely on the heat of an arc to melt and fuse two pieces of metal and a filler rod. But did you know that the heat of the arc can match and surpass the temperature of the Sun's surface?

Depending on the welding process, the arc heat typically ranges from 6,000 to 10,000°F (3,315 to 5,537°C). This intense heat is what temporarily melts two metal pieces, allowing them to form a bond. Meanwhile, the surface of the Sun is approximately 9,932°F (5,500°C).

Temperature Comparison: Welding Arc vs. Sun Surface

The arc reaches an extreme temperature because of the electric current flowing between the electrode and the ground. The higher the current is (amperage), the more heat the arc generates.

Some processes, such as Plasma Arc Welding (PAW), produce temperatures between 10,000°F and 50,000°F. The plasma cutting jet also uses an extremely hot arc, typically ranging from 36,000°F to 54,000°F (20,000°C to 30,000°C). Concentrated, intense, high-velocity energy makes it far hotter than conventional methods like TIG/MIG, and almost five times hotter than the surface of the Sun.

Why is this information important for you? Well, the next time you think you can finish a quick weld without using complete personal protective equipment, think twice.

3. You can weld in space, and similar metals can even weld themselves

Some state-of-the-art welding methods use a vacuum chamber to eliminate the risk of atmospheric contamination. But did you know you can weld in space, and similar metals can even weld themselves?

According to NASA, Soviet cosmonauts on Soyuz-6 performed the first welding in space in 1969. The space station carried the Vulkan welding furnace for vacuum welding experiments in the depressurized orbital module.

The crew of Soyuz 6
Source: https://www.spacefacts.de/mission/english/soyuz-6.htm

Years later, in 1973, the US conducted bead-on-plate welding, brazing, and metal-melting experiments on the Skylab orbital space station. Finally, Soviet cosmonauts in the Salyut-7 capsule made the first (and last) welds in open space in 1984.

Until today, welding in space has stagnated significantly due to harsh environmental conditions. Variable microgravity, reduced pressure, and extreme temperature swings make controlling the bead and its temperature in space quite challenging.

Welding in Space
Source: https://www.youtube.com/watch?v=eVzUmQ6Oi5c

Cold Welding in Space

There is a specific phenomenon that occurs on similar metals in space. Two similar, clean, and uncoated metals can fuse in a vacuum without using heat or pressure. This form of metal joining, known as cold welding in space, is quite fascinating.

Because of insufficient air in the space, metals cannot form a surface oxide layer. Since there is no protective oxide layer, two similar, clean, and uncoated metals can spontaneously weld in space.

This phenomenon poses a unique challenge for space engineers, as it can jam or lock moving parts, hinges, and instruments in place. Engineers overcame the differences by using different alloys or coating the critical pieces, preventing them from fusing.

4. You can weld deep underwater

We all learned that electricity and water don't mix, but that's not what underwater welders learn. Did you know you can weld underwater, at depths of over 1000 ft?

Underwater welding is a specialized process used to repair and maintain marine structures, pipelines, and ships beneath the water's surface. High-skilled personnel must hold a commercial diving certification and be certified welders.

Underwater Welding
Photo by @depthshift (TikTok)

There are two main types of underwater welding:

• Dry welding

• Wet welding

In dry underwater welding, welders work in a hyperbaric chamber, placed around the welding structure. The chamber is pressurized and filled with gases to reduce the risk of decompression sickness and make welding much safer. The deepest recorded dry underwater weld was performed at a depth of 1,075 feet (approximately 328 meters) in 1990.

Dry Underwater Welding
Source: https://www.youtube.com/watch?v=hHndKI9h8J8

In wet underwater welding, welders weld in water and rely on gaseous bubbles. These bubbles encircle the arc, preventing the electrical conduction and protecting the weld. However, they can affect visibility and the weld pool, making the welding much more challenging. In 2005, the US Navy performed the deepest recorded underwater weld in the Gulf of Mexico at a depth of 2,000 feet (approx. 610 meters).

Due to the high skill requirements and severe risks, underwater welders are among the highest-paid welding professions. Although many fear electricity, electrical shocks take very few victims among underwater welders. The most common cause of death in underwater welding is drowning, caused by tangling, faulty equipment, poor visibility, or natural current.

5. There are over 70 different welding processes, but we are only using a few

The first-ever method was carbon arc welding, and upgraded versions are still used today. But did you know that there are roughly 70 different welding processes today?

Advancements in technology and industry have transformed arc welding from traditional forms into state-of-the-art processes. As a hobby welder or metal fabricator, you are likely to use a welder such as the YesWelder DP200 for the most popular welding methods: MIG, TIG, Stick, or Flux-Cored Arc Welding.

People prefer these because they balance efficiency, cost, and practicality. You don't need special tools or complex equipment, and the consumables and accessories are quite affordable.

However, specialized industries require modern solutions to answer their needs. As a result, we are seeing advanced welding methods such as:

• Electron beam welding (EBW)

• Plasma arc welding (PAW)

• Laser beam welding (LBW)

• Explosion welding (EXW)

• Ultrasonic welding (USW)

• Friction welding (FWR)

These are just some of the advanced techniques that use different heat sources to melt and fuse pieces. Among these techniques, there are even more variations and types.

For example, EBW can be high-vacuum, medium-vacuum, or no-vacuum; friction welding can be friction stir, rotary, linear, or low-force; laser beam welding can be keyhole or conduction; pulsed or continuous-wave laser welding, etc.

Each of the 70 or more variations has its favorable applications. But most are cost-inefficient for ordinary welding.

6. Welding faces a significant shortage of skilled workers

The American Welding Society and the Welding Workforce Data project estimate a need for 320,500 new welding professionals in the US by 2029. That's approximately 80,000 vacant welding jobs between 2025 and 2029.

Welding Labor Shortage
Source: https://smooth-robotics.com/solving-welder-shortage-with-cobot-automation/

The welding industry is experiencing a significant shortage of skilled workers. There are several reasons behind it:

• Aging and retirements: According to AWS, more than 157,000 welding professionals in the US are approaching retirement. This leaves a major void in skilled, experienced labor.

• Lack of interest among younger generations: AWS data show that fewer than 10% of welders are under 25 years old. Younger generations are less interested in pursuing manual, physical trades, deepening the shortage.

• Increased number of projects: Increased manufacturing, energy, and infrastructure projects require more certified, specialized welders.

• Level pay difference: While welding is advertised as a high-paying profession, there is a significant skill-level gap. Entry-level jobs pay hardly more than much easier occupations, while welding professionals earn more than doctors or lawyers.

All these contribute to the increasing need for skilled welders. That might be an opportunity for you to start a career in welding and get a certification.

7. Welding accounts for the 50% of the world's manufactured structures

Welding is an important trade, but did you know that approximately 50% of all man-made products require welding? Many know that welding is the backbone of modern infrastructure, but millions of products (including some plastics) require welding.

Welding Nut Flower
Photo by @haydenjohns18 (TikTok)

The applications of welding spread throughout various global industries, such as:

• Aerospace: Delicate welding on thin aircraft parts. Welding even took us to space, playing a role in spacecraft construction, pressurized environments, and enabling successful launches.

• Automotive: The modern automotive industry relies on automated welding, as each car includes over 5,000 spot welds.

Automotive Welding Process
Source: https://www.youtube.com/watch?v=ftY-MH5mdbw

• Steel construction: Skyscrapers, bridges, and large-scale structures all rely on welding.

• Shipbuilding: Nearly 90% of the structure of modern ships is built through welding. The transition occurred after World War I, since the Naval Treaty limited displacement by weight to 10,000 tons rather than the number of ships. Moving from riveting to welding significantly reduced vessel weight, enabling a larger fleet.

Welding in Shipbuilding
Photo by @wm_uk (TikTok)

• Oil and gas: Welding is essential for offshore rigs and oil and gas transportation. The Trans-Alaska Pipeline project is considered the world's longest, albeit sectional, weld with over 500 km of welds in pipes.

• General fabrication: Welding is a crucial part of general fabrication. People increasingly use it in DIY projects, every day, and for hobby welding.

8. The first-ever industrial robot was used for welding

The first industrial robot, called Unimate, was installed in 1961 in General Motors' factory. But did you know that one of his primary tasks was spot welding?

Welding robots and automated systems revolutionized the welding process. They allowed manufacturers to complete the job much faster, while taking over dangerous, dirty, or dull jobs that were risky for humans.

The term "robot" appeared in 1920, but the first industrial robot was introduced in 1961. George Devol and Joseph Engelberger created an automated, programmable 4,000-pound hydraulic arm called Unimate.

First Industrial Robot Unimate Ever
Source: https://www.youtube.com/watch?v=-Xl2c91pWGc

Unimate had two primary tasks:

• Removing hot, molded die-cast metal parts from machines and stacking them,

• Spot welding on car bodies.

The robot was a great success, leading to its adoption by other automotive manufacturers like Ford and Chrysler. Today, automated systems are essential parts of the automotive industry. China is leading in the adoption of fully automated "dark factories," particularly in the EV sector.

9. Welding robots can reach speeds up to 60 ft. per minute

Modern welding, especially in high-volume manufacturing applications, is all about speed. Did you know that modern welding robots can reach incredible speeds of up to 60 ft per minute?

To illustrate how fast this is, let's look at the fastest manual welding method: MIG welding. With MIG, welders can maintain a common travel speed of 15 to 20 inches per minute (IPM).TIG welding is 2-5 times slower, with a typical welding speed averaging 4–6 inches per minute.

Welding Speed Comparison: Robotic vs. Manual Methods
Photo by Unsplash

Automated welding systems, on the other hand, with automated procedure, optimized settings, and continuous operation, reach up to 60 ft per minute. Here are some examples:

• Automated laser welders reach speeds exceeding 50 feet per minute.

• Friction stir welding (FSW) can reach speeds of 10 to 60 inches per minute, depending on the material and thickness.

• Automated spot welding in the automotive industry achieves speeds that exceed 60 feet per minute.

Automated Spot Welding
Images: Pro Spot Automation

10. You can use sound or explosions to make welds

As previously mentioned, there are dozens of advanced welding methods today. Did you know you can use sound or explosions to make welds?

Ultrasonic welding (USW) is a unique method that uses high-frequency (typically 20–70 kHz) acoustic vibrations under pressure to join materials. The vibrations create localized frictional heat at the joint, causing molecular bonding within less than a second.

How Ultrasonic Welding Process Works
Source: https://www.youtube.com/watch?v=TH5Pkj3ew7k

Manufacturers used USW to weld the first plastic-body cars. But this idea didn't live through. However, the process remained useful for welding thermoplastics and non-ferrous metals, as well as in automotive, medical, and packaging applications.

Explosion welding is another interesting method that uses controlled chemical explosives to accelerate one metal plate into another at high velocity. Impact creates a strong atomic bond without significant heat-affected zones, allowing welders to weld dissimilar metals or transition joints.

Conclusion

Welding is truly a fascinating occupation, though many see it as just a simple trade. There are interesting and fun facts surrounding it, such as how deep the welders have been and how they welded the stuff in space.

We learn something new every day that makes us appreciate our profession even more. Who knows, maybe one day you'll be a record holder, or part of the advanced methods we all read about.

TIG Welding in Process
Source: https://www.youtube.com/watch?v=P9HPvW9BrUw

🧐 10 Fun Welding Facts You Didn't Know FAQ

1. How hot can a welding arc get compared to the Sun?

A typical welding arc ranges from 6,000–10,000°F (3,315–5,537°C), which can match or exceed the Sun’s surface temperature (9,932°F / 5,500°C). Plasma arcs can reach 10,000–54,000°F, far hotter than the Sun.

2. Why is there a shortage of skilled welders in the US?

The shortage comes from an aging workforce approaching retirement, low interest among young people, growing industry demand, and a wage gap between entry-level and skilled welders. The US will need 320,500 new welders by 2029.

3. Can you weld without traditional heat or electricity?

Yes. Ultrasonic welding uses high-frequency sound vibrations, and explosion welding uses controlled explosions to create strong bonds between metals.

 

 

 

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