ThePipingMart Blog Welding Electrodes AWS Class E320LR-16 Coated Electrodes- Composition, Properties, and Uses

AWS Class E320LR-16 Coated Electrodes- Composition, Properties, and Uses

AWS Class E320LR-16 Coated Electrodes

When it comes to welding, the type of electrode used can make a significant difference in the quality of the weld. AWS Class E320LR-16 Coated Electrodes are popular for their high-quality welds and sturdy composition. This blog post will investigate the composition, physical and mechanical properties, heat treatment, corrosion resistance, and uses of AWS Class E320LR-16 Coated Electrodes.

What are AWS Class E320LR-16 Coated Electrodes?

AWS Class E320LR-16 Coated Electrodes are specialized stainless steel electrodes used for welding electrodes when a high degree of corrosion resistance is required. They come coated with a layer of aluminium and silicon, providing excellent protection against corrosion caused by chloride ions while still maintaining a good current transfer capacity. These electrodes can be used in saltwater environments or where there is an increased risk of cracking due to hydrogen embrittlement when welding high-strength steels, such as 9Cr martensitic stainless steels. They are also great for dissimilar joints between different types of stainless steel and nickel alloys, making them incredibly versatile.

AWS Class E320LR-16 Coated Electrodes are a type of low-alloy steel electrode typically used for welding carbon or low-alloy steel. The “E” in E320LR-16 indicates that it is an electrode, while “320” denotes the minimum tensile strength in MPa, and “LR” stands for Low Alloy Steel. The “16” refers to the electrode coating flux composition.

E320LR-16 Welding Electrodes Composition

Composition-wise, AWS Class E320LR-16 Coated Electrodes include elements like Chromium, Nickel, and Molybdenum, which give them strength and corrosion resistance. The lower carbon content also improves weldability and reduces the risk of cracking. Additionally, the presence of Manganese and Silicon in these electrodes helps smoothen the welds and improve their appearance.

C Cr Ni Mo Nb + Ta Mn Si P S Cu
0.03 19.0-21.0 32.0-36.0 2.0-3.0 8 X C, min to 0.40 max 1.50-2.50 0.30 0.02 0.015 3.0-4.0

E320LR-16 Coated Electrodes Physical Properties

The physical properties of AWS Class E320LR-16 Coated Electrodes are quite impressive. The electrodes have a tensile strength of 550 MPa and a yield strength of 430 MPa, making them ideal for high-stress applications. The elongation percentage is 29%, with a hardness value of 190-240 HB, making it suitable for normal and high-temperature applications.

E320LR-16 Welding Electrodes Mechanical Properties

AWS Class E320LR-16 Coated Electrodes exhibit excellent Mechanical Properties as well. The electrodes are tough, making them ideal for applications requiring cracking resistance. While the impact strength is 70J at -40°C, the fatigue strength is 600 MPa for up to 2 million cycles, making them perfect for applications requiring cyclic loading.

Yield Strength 85,000 psi
Tensile Strength 57,000 psi
Elongation 34%

E320LR-16 Coated Electrodes Trade Names

Class UNS Oxford Alloys
E320LR-16 W88022 Alloy 320LR-16

E320LR-16 Welding Electrodes Parameters

Diameter Process Volt Amps (flat) Amps (V/OH)
in (mm)
 3/32  (2.4) SMAW  24-28 70-85 65-75
 1/8  (3.2) SMAW  26-30 85-110 80-90
 5/32  (4.0) SMAW  28-32 110-140  100-120
 3/16  (4.8) SMAW  28-32 120-160  110-130

E320LR-16 Coated Electrodes Uses

AWS Class E320LR-16 coated electrodes are an ideal choice for welding alloy. The coating is a flux-coated, low hydrogen, rutile type electrode which is used in gas shielded metal arc welding (GMAW) applications. It provides excellent corrosion resistance and weldability properties with low spatter production when it comes to joining thin sheets of aluminum or magnesium alloys as well as thicker sections of wrought or cast alloy material. This electrode produces DCEN reverse polarity DC arc and can be operated in spray transfer mode at higher currents. Additionally, this electrode features good bead shape and smooth surface profile on both sides of the weld with no slag removal required afterwards. It also has an operating temperature range from -20 to +400°C making it highly reliable for critical applications in aviation, automotive industries etc.

E320LR-16 Welding Electrodes Heat Treatment

Heat treatment is important when it comes to AWS Class E320LR-16 filler wire. During welding wire, the electrodes must be preheat-treated to prevent cracking and avoid warping. They can then be post-weld heat treated to enhance their mechanical properties and ensure they withstand the stresses they will be subjected to.

E320LR-16 Coated Electrodes Corrosion Resistant

AWS Class E320LR-16 welding Electrodes are highly corrosion resistant. The presence of elements like Nickel, Chromium, and Molybdenum ensures that the electrodes resist corrosion in harsh environments. These properties make these electrodes ideal for use in industries like offshore drilling, where the equipment is subjected to constant exposure to saltwater.

Conclusion

AWS Class E320LR-16 filler metal are an ideal choice if you are looking for high-quality welds and sturdy composition. The presence of elements like Chromium, Nickel, and Molybdenum ensures that the electrodes are strong and corrosion-resistant. The Mechanical Properties of AWS Class E320LR-16 Coated Electrodes make them an ideal choice for cracking and fatigue resistance applications. The heat treatment process is essential to ensure the optimal performance of the electrodes. Moreover, the electrodes are highly corrosion-resistant, making them ideal for use in industries like offshore drilling. Overall, AWS Class E320LR-16 Coated Electrodes is a high-quality product that is an excellent choice for any welding application.

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