Welding is essential in various industries, such as aerospace, automotive, and construction. And to create high-quality welds, choosing the right filler materials is important. AWS Class ERNiFeCr-2 is a commonly used filler metal in welding applications. This blog post discusses everything you need to know about AWS Class ERNiFeCr-2, including its composition, physical properties, mechanical properties, uses, heat treatment, and corrosion resistance.
What is AWS Class ERNiFeCr-2?
AWS Class ERNiFeCr-2 coated electrode is a reinforced Concrete class designed and developed by AWS (American Welding Society) for bridge structures. It has greater resilience and strength than traditional concrete, making it ideal for high-traffic or complex structures. The process begins with reinforcing steel bars into a concrete matrix, integrating both materials to form a stronger whole. This allows the hybrid material to handle larger loads without sacrificing stiffness or increasing weight drastically compared to typical Concrete. Additionally, its ability to withstand strong acids and bases makes it an excellent choice when exposed to these chemicals over time, such as in wastewater treatment plants or storage tanks exposed to harsh elements.
ERNiFeCr-2 Welding Wire Composition
AWS Class ERNiFeCr-2 is a nickel-based alloy that contains significant amounts of iron, chromium, and molybdenum. It also has many other elements, such as manganese, silicon, and carbon. The composition of AWS Class ERNiFeCr-2 makes it suitable for welding similar alloys such as Inconel and Hastelloy.
| C | Mn | Si | Cr | S | P | Ni | Fe | Cu | Al | Mo | Ti | Nb+Ta |
| ≤0.08 | ≤0.35 | ≤0.35 | 17-21 | ≤0.015 | ≤0.015 | 50-55 | Rest | ≤0.3 | 0.2-0.8 | 2.8-3.3 | 0.65-1.15 | 4.75-5.5 |
ERNiFeCr-2 Coated Wire Physical Properties
AWS Class ERNiFeCr-2 welding alloy has a density of 8.4 g/cm³. It’s also known for its excellent thermal conductivity and low coefficient of thermal expansion. It has a melting point of around 1300°C.
ERNiFeCr-2 Welding Wire Mechanical Properties
AWS Class ERNiFeCr-2 welding electrode has good tensile strength, yield strength, and elongation. Its flexibility and toughness are also commendable, making it suitable for welding applications requiring high temperatures and pressure resistance.
| Tensile Strength MPa(ksi) | Yield Strength MPa(ksi) | Elongation % | |
| AWS requirement | 1140(165) | Not specified | Not specified |
| Typical results as welded | 860(125) | 630(91) | 27 |
ERNiFeCr-2 Coated Wire Trade Name
| Class | UNS | Oxford Alloys | Special Metals |
| ERNiFeCr-2 | N07718 | Alloy 718 | Inconel Filler Metal 718 |
ERNiFeCr-2 Welding Wire Parameters
| Diameter | Process | Volt | Amps | Shielding Gas | |
| In | mm | ||||
| 0.035 | 0.9 | GMAW | 26-29 | 150-190 | Spray Transfer 100% Argon |
| 0.045 | 1.2 | GMAW | 28-32 | 180-220 | |
| 1/16 | 1.6 | GMAW | 29-33 | 200-250 | |
| 1/16 | 1.6 | GTAW | 14-18 | 90-130 | 100% Argon |
| 3/32 | 2.4 | GTAW | 15-20 | 120-175 | 100% Argon |
| 1/8 | 3.2 | GTAW | 15-20 | 150-220 | 100% Argon |
ERNiFeCr-2 Coated Wire Uses
AWS Class ERNiFeCr-2 is primarily used in welding applications that involve joining nickel-based alloys. It’s also used in dissimilar metal welding, where it’s used to join metals with different chemical compositions. The alloy is commonly used in aerospace, chemical processing, and power generation industries.
ERNiFeCr-2 Welding Wire Heat Treatment
AWS Class ERNiFeCr-2 does not require any heat treatment. However, controlling the interpass temperature during welding is essential to prevent cracking and distortion.
ERNiFeCr-2 Coated Wire Corrosion Resistance
AWS Class ERNiFeCr-2 filler wire has remarkable resistance to corrosion and high-temperature oxidation. It’s used in applications that require excellent resistance to corrosion, such as chemical processing, gas turbines, and heat exchangers.
Conclusion
AWS Class ERNiFeCr-2 is an excellent filler metal with commendable mechanical and physical properties. Its composition makes it suitable for welding nickel-based alloys and dissimilar metals. AWS Class ERNiFeCr-2 is commonly used in various industries, and its corrosion and heat resistance make it a popular choice in demanding applications.
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