The AWS Class ER347 SAW & Flux is a welding wire used in various aerospace, petrochemical, and power generation industries. Welding is a process of joining two or more metals together, and it becomes important to understand what goes inside the welding process. This article will discuss everything you need to know about AWS Class ER347 SAW & Flux, from its composition and physical properties to its uses and corrosion resistance.
What is AWS Class ER347 SAW & Flux?
AWS Class ER347 SAW & Flux electrode is a process of flux-cored arc welding (FCAW). This semi-automatic manual process uses a combination of self-shielded gasless wire electrodes and externally supplied shielding gas to form an arc between the electrode and the workpiece. The heat generated by this arc melts the base metal and electrode, which then react to form an alloy weld bead that solidifies as it cools. ER347 has higher chromium content than other alloys, giving it superior corrosion resistance, which makes it ideal for welding stainless steels in extremely corrosive environments. This high-quality weld metal also has good ductility, making it an excellent choice for applications that require maximum strength after weldment.
ER347 SAW & Flux Coated Wire Composition
The AWS Class ER347 SAW & Flux welding alloy is a type of austenitic stainless steel used for welding. It mainly comprises chromium, nickel, and small amounts of niobium and molybdenum. The presence of niobium enables the wire to prevent intergranular corrosion and improves its heat resistance. The wire also has a low carbon content, making it less susceptible to sensitization and weld decay.
| C | Cr | Ni | Mo | Mn | Si | P | S | Cu | Element | Amount |
| 0.08 | 19.0-21.5 | 9.0-11.0 | 0.75 | 1.0-2.5 | 0.30-0.65 | 0.03 | 0.03 | 0.75 | Nb | 10XC min/1.0 max |
ER347 SAW & Flux Welding Wire Physical Properties
Regarding physical properties, the AWS Class ER347 SAW & Flux welding has a bright and smooth surface, making it easy to feed through the wire feeder. It also has a low amount of spatter, which means the welding process is clean and efficient. The wire comes in different sizes, ranging from 0.045 to 0.093 inches in diameter, making it suitable for different jobs.
ER347 SAW & Flux Coated Wire Mechanical Properties
The AWS Class ER347 SAW & Flux wire also has strong mechanical properties. It has a tensile strength of 85,000 psi, yield strength of 65,000 psi, and an elongation of 35%. These properties make the wired ideal for welding applications that require high strength and toughness.
| Yield, kpsi: | 57 |
| Tensile Strength, kpsi: | 86 |
| Elongation%, min: | 35 |
ER347 SAW & Flux Welding Wire Trade Names
| Class | UNS | Oxford Alloys |
| ER347 | S34780 | Alloy 347 |
ER347 SAW & Flux Coated Wire Parameters
| Diameter | Process | Volt |
Amps |
GAS | |
| in | (mm) | ||||
| .035 | (0.9) | GMAW | 22-23 | 180-210 | Spray Transfer 98% Argon/2% Oxygen |
| .045 | (1.14) | GMAW | 23-25 | 195-260 | Spray Transfer 98% Argon/2% Oxygen |
| 1/16” | (1.6) | GMAW | 25-28 | 260-390 | Spray Transfer 98% Argon/2% Oxygen |
ER347 SAW & Flux Welding Wire Uses
AWS Class ER347 SAW & Flux filler metal is widely used in different industries for welding stainless steel and other high alloy steels. It is commonly used for welding austenitic stainless steels such as 304L, 321, and 347 and for welding dissimilar metals. The wire works well with submerged arc welding (SAW) and flux-cored arc welding (FCAW).
ER347 SAW & Flux Coated Wire Heat Treatment
Heat treatment plays an important role in the welding process. AWS Class ER347 SAW & Flux filler metal can be annealed at 1900°F for one hour for a full anneal. The wire can also be stress relieved at 1200°F for one hour. Proper heat treatment ensures that the welded joint is strong and durable.
ER347 SAW & Flux Welding Wire Corrosion Resistance
The AWS Class ER347 SAW & Flux welding wire is highly corrosion-resistant and ideal for corrosive environments. The wire resists intergranular corrosion due to the presence of niobium, and it also has good resistance to pitting and crevice corrosion. This makes it popular for welded parts in chemical processing, marine engineering, and oil and gas industries.
Conclusion
In conclusion, AWS Class ER347 SAW & Flux is a versatile welding wire with strong mechanical properties and is highly corrosion-resistant. It is commonly used in a wide range of applications in various industries and is suitable for welding austenitic stainless steels and dissimilar metals. Understanding the composition, physical and mechanical properties use, heat treatment, and corrosion resistance of AWS Class ER347 SAW & Flux will help you make informed decisions and ensure high-quality welding results.
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.
