Welding is an important aspect of several industries for fabricating or repairing metallic structures. Among different welding techniques, submerged arc welding (SAW) stands out as it combines high welding speed, deep penetration, and deposition rates. AWS Class EB8 SAW & Flux is a welding filler metal widely used in the industry. This blog will delve deeper into the properties, composition, uses, and heat treatment of AWS Class EB8 SAW & Flux welding.
What is AWS Class EB8 SAW & Flux?
AWS Class EB8 SAW & Flux welding electrodes are used for submerged arc welding (SAW) applications. They consist of a mild steel core wire with a thin layer of an alloyed flux coating. The flux coating provides enhanced arc stability and improved weldability vs non-fluxed SAW electrodes. EB8 electrodes can deposit higher strength, crack-resistant weld deposits with excellent post-weld bead cleaning characteristics. In addition, using these high-grade welding consumables can simplify process parameters in automatic submerged arc welding (SAW). They can also be used for manual single and two-sided fillet and butt welding applications on carbon steels or low alloy steels with thicknesses up to 1/2-inch-thick in multiple pass operations.
EB8 SAW & Flux Welding Wire Composition
AWS Class EB8 SAW & Flux welding alloy is made of a low-alloyed steel wire that comprises various elements, including silicon, manganese, nickel, and chromium. The flux component of the welding wire contains carbonates, minerals, and ferroalloys. Combining these components provides a stable and consistent electrical arc, enhancing the welding quality.
| C | Mn |
Si |
Cr |
Mo |
P |
S |
Cu |
| 0.10 max |
0.30- 0.65 | 0.05- 0.50 | 8.0- 10.50 | 0.80- 1.20 | 0.025 max |
0.025 max |
0.35 max |
EB8 SAW & Flux Coated Wire Physical Properties
The physical properties of AWS Class EB8 SAW & Flux electrode are crucial to ensure the successful welding process. The welding wire has a diameter range of 1.6 mm to 5.0 mm, while the flux is in granular powder form. The flux-to-wire ratio plays a critical role in the welding process. It should be appropriately adjusted to achieve the desired welding outcome.
EB8 SAW & Flux Welding Wire Mechanical Properties
The mechanical properties of AWS Class EB8 SAW & Flux filler wire are impressive. The welding wire displays high tensile strength, which makes it resistant to breakage and deformation. Moreover, the hot cracking tendency of the welding wire is minimal, which plays an important role in welding cast iron materials.
| Tensile Strength MPa (ksi) | Yield Strength MPa (ksi) |
Elongation |
|
| Typical Results – As welded | 550 (79) | 430 (63) |
30 |
EB8 SAW & Flux Coated Wire Trade Names
| Class | UNS | Oxford Alloys |
| EB8 | S50480 | Alloy EB8 |
EB8 SAW & Flux Welding Wire Parameters
|
Typical Welding Parameters |
|||||
|
Diameter |
Process |
Volt |
Amps |
SAW Flux | |
|
in |
(mm) |
||||
|
3/32 |
2.4 |
SAW |
28-32 |
250-400 |
Suitable Flux |
|
1/8 |
3.2 |
SAW |
30-34 |
400-600 |
Suitable Flux |
EB8 SAW & Flux Coated Wire Uses
AWS Class EB8 SAW & Flux filler metal is widely used in various industries, including shipbuilding, bridge construction, oil and gas refineries, and manufacturing. It is an excellent choice for welding high-strength, low-alloy materials and medium and heavy fabrication projects. The welding wire is versatile and provides high deposition rates, which can save welding time.
EB8 SAW & Flux Welding Wire Heat Treatment
AWS Class EB8 SAW & Flux welding requires careful heat treatment to achieve the desired mechanical properties. The heat treatment process involves preheating, interpass, and post-weld heat treatment. The preheating is done to reduce thermal stress, prevent cracking, and improve weldability. Interpass heat treatment is carried out between the first and second passes to ensure proper heat distribution. Post-weld heat treatment achieves the desired mechanical properties, such as increased flexibility and toughness.
EB8 SAW & Flux Coated Wire Corrosion Resistant
AWS Class EB8 SAW & Flux welding is corrosion-resistant when used to weld alloy materials. The flux component of the welding wire contains elements that improve the resistance to atmospheric corrosion and chemical attack. Moreover, AWS Class EB8 SAW & Flux welding has a low hydrogen level, which reduces the risk of hydrogen-induced cracking.
Conclusion
AWS Class EB8 SAW & Flux welding is ideal for high-strength and low-alloy materials. The welding wire’s ability to provide high deposition rates, deep penetration, and stable electrical arc makes it an excellent choice for various industrial applications. By understanding the composition, physical and mechanical properties, uses, heat treatment, and corrosion-resistant properties of AWS Class EB8 SAW & Flux welding, welding professionals can choose the right welding process for their fabrication and repair works.
Hey, I’m Krutik, a casual blogger expert in the metal industry. I am passionate about providing valuable information to my readers. With a background in engineering and construction, I like playing Cricket & watching Netflix shows in my free time. Thank you for visiting my blog, and I hope you find my information helpful!
