Welding is a technique that joins two materials, such as metal, plastic and chemical substances, to form a solid bond. Among the many welding techniques available, MIG (Metal Inert Gas) and TIG (Tungsten Inert Gas) welding are popular methods used in various industries. This blog will focus on AWS (American Welding Society) Class ERTi-1 MIG & TIG welding.
What is AWS Class ERTi-1 MIG & TIG?
AWS Class ERTi-1 MIG/TIG welding electrodes are a type of metal electrode used for arc welding. They are made from pure Red Titanium (ERTi). These electrodes utilize the latest fusion technology to produce incredibly strong bonds, with deposited welds averaging between 45 and 50 HRC on the Rockwell Hardness scale. They provide an impressive combination of fracture toughness, fatigue strength, flexibility and impact resistance compared to other metal electrodes. The electrodes are ideal for building or repairing low alloy steels requiring greater hardenability, such as in pressure vessels, boilers and some die-casting applications. Additionally, they can be used in most general metal fabrication operations requiring high-strength welds that must remain highly corrosion-resistant over time.
AWS Class ERTi-1 MIG & TIG Composition
AWS Class ERTi-1 is a commercially pure titanium filler metal. It is a non-alloyed, all-position, consumable material with excellent corrosion resistance, ductility, and strength. This titanium alloy has small traces of oxygen, nitrogen, carbon, and hydrogen as impurities. Moreover, it has a low melting point and a high electrical conductivity making it a popular choice in joining titanium and other dissimilar materials.
| Ti |
O |
Fe |
H |
C | N |
| REM | 0.03- 0.10 |
0.08 |
0.005 |
0.03 | 0.012 |
AWS Class ERTi-1 MIG & TIG Physical Properties
AWS Class ERTi-1 MIG & TIG welding wire is available in 0.030” and 0.035″. The wires are spooled neatly, ensuring they remain tangle-free and compatible with standard MIG and TIG torch guns. The wire has a shiny silver finish, indicating its purity. Additionally, it is easy to form into different shapes.
AWS Class ERTi-1 MIG & TIG Mechanical Properties
AWS Class ERTi-1 MIG & TIG welding wire has a low coefficient of thermal expansion and high tensile strength, making it ideal for aerospace, medical devices, and chemical processing equipment applications. It has a yield strength of 29 ksi and an ultimate tensile strength of 50 ksi. The elongation at failure is about 20%, indicating its ability to deform without cracking.
| Tensile strength (psi) | 35,000 |
| Yield strength (0.2% offset) (psi) | 25,000 |
| Elongation in (%) | 24 |
AWS Class ERTi-1 MIG & TIG Trade Name
| Class | UNS | Oxford Alloys | BOHLER |
| ERTi-1 | R50100 | Alloy Ti-1 | BOHLER ERTi-1 -IG |
AWS Class ERTi-1 MIG & TIG Parameters
| Filler Wire Size | Tungsten | Amps | Volts | Gas Cup Size | Argon (cfh) | Base thickness |
| 1/16” | 1/16” | 100-185 | 9-12 | 1/2” | 20 | 1/16-1/8” |
| 3/32” | 3/32” | 150-250 | 11-15 | 5/8” | 25 | 1/8- 3/16” |
| 1/8” | 1/8” | 200-375 | 11-15 | 3-4” | 30 | 1/4-1/2” |
AWS Class ERTi-1 MIG & TIG Uses
AWS Class ERTi-1 MIG & TIG welding wire is specifically designed for welding commercially pure titanium and titanium alloys (Grade 1 to Grade 4) in numerous applications, including aerospace, shipbuilding, medical implants, and chemical processing. It can also fabricate components such as tanks, pipes, heat exchangers, and sanitary equipment requiring excellent corrosion resistance.
AWS Class ERTi-1 MIG & TIG Heat treatment
AWS Class ERTi-1 MIG & TIG welding wire does not require annealing to improve its mechanical properties. However, it may benefit from post-weld heat treatment. This is especially true when the application requires high strength and improved ductility.
AWS Class ERTi-1 MIG & TIG Corrosion Resistance
AWS Class ERTi-1 MIG & TIG welding wire displays excellent corrosion resistance to various corrosive environments, including strong acids and chlorides. This makes it ideal for seawater applications such as marine propellers and underwater installations.
Conclusion:
AWS Class ERTi-1 MIG & TIG welding wire is a commercially pure titanium filler metal with excellent ductility, strength, and corrosion resistance. Its low melting point and high electrical conductivity make it a popular choice for joining dissimilar materials. Used in aerospace, medical devices, and chemical processing equipment, it remains a highly sought-after material that can withstand harsh environments and easily deliver structural integrity.
Meet Heer, a dynamic and driven writer learning tricks of her trade in the metal industry. With a background in Digital Marketing, Heer brings a unique perspective to her writing, sharing valuable insights. Apart from blogging she like reading and hiking.
