ErNiCr-3 filler wire is a nickel-based alloy with chromium and molybdenum extensively used in welding applications. This wire is renowned for its excellent corrosion resistance and high-strength properties, making it a popular choice in various industries. This expert guide will explore everything you need about ErNiCr-3 filler wire, from its composition to its applications.
What are ErNiCr-3 Filler Wire?
ErNiCr-3 filler wire, also known as INCONEL 82 or Alloy 82, is a nickel-chromium alloy filler metal used for the maintenance and repair welding of nickel-based alloys. This type of wire provides exceptional corrosion resistance in many environments and can be used to weld components that withstand elevated temperatures from carburizing atmospheres. ErNiCr-3 wires offer improved fatigue and creep resistance and higher yields at elevated temperature stresses compared with standard stainless steel filler metals.
In addition to excellent corrosion resistance in high-pressure steam systems, this wire is also exceptionally resistant to oxidation at high temperatures up to 2300 °F (1260 °C). Furthermore, the mechanical properties of ErNiCr-3 filler wires are more stable than those of other Ni-, Fe/, and Cr– based alloys, even after long exposure times. They are commonly used on structural steel components subject to cyclic loading or vibration, such as frames that support diesel engines, oil well equipment, gas turbine parts and vessels operating under aggressive conditions.
Using ErNiCr-3 filler wires offers numerous advantages due to their unusual strength and toughness at high temperatures and good oxidation resistance over extended periods. It is suitable for cladding purposes on dissimilar stainless steels or overlay applications on carbon steels where increased stress will be encountered due to its superior crack-resistant properties compared to other alloy filler metals available today.
ErNiCr-3 Filler Wire – The Expert Guide
Composition and Properties of ErNiCr-3 Filler Wire
ErNiCr-3 filler wire has a nickel content of approximately 65%, 20-23% chromium and 8-10% molybdenum. This filler wire also has a small amount (up to 1.5%) of titanium, which helps to improve its weldability. ErNiCr-3 has high-temperature strength and can withstand extreme environments, including high-temperature oxidation and sulfuric acid exposure.
Applications of ErNiCr-3 Filler Wire
ErNiCr-3 filler wire is used extensively in applications that require excellent corrosion resistance, especially in the chemical and petrochemical industries. This filler wire is used for welding Inconel alloys, commonly used in heat exchangers, valves, and furnace components requiring high-temperature strength and corrosion resistance. It is also used for welding nickel-chromium-iron alloys such as Hastelloy and Monel, used in marine applications and chemical processing plants.
Welding Techniques for ErNiCr-3 Filler Wire
ErNiCr-3 can be used for gas tungsten arc welding (GTAW) and gas metal arc welding (GMAW) processes. The recommended welding techniques for ErNiCr-3 filler wire include preheating, proper joint preparation, and shielding gas. The filler wire can also be used for welding dissimilar metals. However, it is essential to ensure that the correct joint design and welding techniques are used to achieve the desired results.
Storage and Handling of ErNiCr-3 Filler Wire
ErNiCr-3 filler wire is sensitive to moisture and contamination, negatively impacting its weldability and quality. It is, therefore, essential to store the filler wire in a dry and clean area, away from any moisture or contaminants. Proper handling practices should also be followed, including using dry gloves and avoiding touching the filler wire with bare hands.
Advantages of Using ErNiCr-3 Filler Wire
The advantages of using ErNiCr-3 filler wire include its high corrosion resistance, high-temperature strength, and excellent weldability. This filler wire is also easy to use and readily available. Its versatility and use in various industries make it popular among welders.
Conclusion
In conclusion, ErNiCr-3 filler wire is a nickel-based alloy widely used for welding applications requiring high corrosion resistance and strength. This expert guide has discussed its composition, properties, applications, welding techniques, storage and handling, and advantages. By following the recommended welding techniques and handling practices, welders can take advantage of the excellent properties of ErNiCr-3 filler wire and achieve high-quality welds.
