ThePipingMart Blog Welding Electrodes AWS Class ER320LR MIG & TIG Welding Wire – Composition, Properties, and Uses

AWS Class ER320LR MIG & TIG Welding Wire – Composition, Properties, and Uses

AWS Class ER320LR MIG & TIG

Are you exploring the world of welding? Do you want to know more about AWS Class ER320LR MIG & TIG? Well, you have come to the right place. This welding filler metal is a popular choice in various industries, from aerospace, petrochemical to food processing. This blog will closely examine the composition, physical and mechanical properties, uses, heat treatment, and corrosion resistance of AWS Class ER320LR MIG & TIG. This knowledge will help you make informed decisions in selecting the right welding filler metal for your project.

What is AWS Class ER320LR MIG & TIG?

AWS Class ER320LR MIG & TIG welding alloy is a gas metal arc welding process combining GMAW and GTAW in a single process. It is also known as “dual shield” or “flux-cored” welding. It utilizes small-diameter consumables with flux-cored wire to deposit weld metal, providing excellent mechanical properties and corrosion resistance. The main advantages of using this method are its better productivity, improved joint quality, higher deposition rates, and lower operating costs compared to traditional manual welding processes. Additionally, it can be used for alloys like stainless steel with excellent filler alloy selection control, which further improves the corrosion resistance of the joints produced by this method.

ER320LR MIG & TIG Welding Wire Composition

AWS Class ER320LR MIG & TIG is a stainless steel welding filler metal comprising 2-3% molybdenum, 8-10% nickel, and 19-21% chromium. These elements provide excellent corrosion resistance, especially in environments that contain chlorides or halides. The filler metal can be used for welding various types of stainless steel alloys, including 316, 316L, and 319L. Its low carbon content reduces the possibility of intergranular corrosion.

C Cr Ni Mo Mn Si P S Nb Cu
8XC min/0.40 max
0.025 19.0-21.0 32.0-36.0 2.0-3.0 1.5-2.0 0.15 0.015 0.02 3.0-4.0 0.75

ER320LR MIG & TIG Coated Wire Physical Properties

The physical properties of AWS Class ER320LR MIG & TIG welding electrode  are also worth noting. It has a 7.94 g/cm³ density, a melting range of 1,371-1,427°C, and a maximum service temperature of 870°C. These properties make it ideal for high-temperature applications.

ER320LR MIG & TIG Welding Wire Mechanical Properties

Regarding mechanical properties, AWS Class ER320LR MIG & TIG welding alloy has a tensile strength of 620 MPa, yield strength of 420 MPa, and an elongation of 30%. These properties ensure that the welded joints are strong and durable.

Tensile Strength, ksi: 86*
Yield Strength, ksi: 58*
Elongation %: 35*

ER320LR MIG & TIG Coated Wire Trade Names

Class UNS Oxford Alloys
ER320LR S30888 Alloy 320LR

ER320LR MIG & TIG Welding Wire Parameters

Diameter Process Volt Amps Shielding Gas
in (mm)
 .035  (0.9) GMAW  22-23 180-210 Spray transfer 98% Argon/2% Oxygen
 .045  (1.2) 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
 .035  (0.9) GMAW  19-23 55-170  Short Circuiting Transfer 90% Helium/  7 ½% Argon / 2 ½% CO2
 .045  (1.2) GMAW  19-23 100-185 Short Circuiting Transfer 90% Helium/  7 ½% Argon / 2 ½% CO2
 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

ER320LR MIG & TIG Coated Wire Uses

AWS Class ER320LR MIG & TIG Filler wire has various uses in different industries. It is commonly used to construct chemical plants, pipelines, heat exchangers, and food processing equipment. It is also used in aerospace and petrochemical industries where high corrosion resistance and strength are required.

ER320LR MIG & TIG Welding Wire Heat Treatment

Heat treatment is important when using AWS Class ER320LR MIG & TIG. It is recommended to perform a solution annealing process at 1,040-1,120°C for 30 minutes. This process helps reduce the possibility of sensitization and ensures that the welded joints have the desired mechanical and corrosion-resistant properties.

ER320LR MIG & TIG Coated Wire Corrosion Resistance

Finally, AWS Class ER320LR MIG & TIG is highly resistant to corrosion, particularly in acidic and chloride-rich environments. This property makes it a top choice for various industrial applications.

Conclusion

AWS Class ER320LR MIG & TIG is an excellent welding filler metal with high corrosion resistance, strength, and durability. Its chemical, physical, and mechanical properties are ideal for various high-temperature industrial applications. We hope this blog has given you a better understanding of AWS Class ER320LR MIG & TIG and how it can be used to meet your welding needs. Whether you are in the aerospace, chemical, food processing or petrochemical industry, AWS Class ER320LR MIG & TIG is a welding filler metal worth considering.

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