ThePipingMart Blog Welding Electrodes AWS Class E630-16 Coated Electrodes – Composition, Properties, and Uses

AWS Class E630-16 Coated Electrodes – Composition, Properties, and Uses

AWS Class E630-16 Coated Electrodes

Welding is a fascinating process that requires specific equipment and materials to ensure strong and durable joints. One of the critical components of welding is the welding electrode. Several types of welding electrodes are on the market, including the AWS Class E630-16 coated electrode. This blog post will delve deeper into AWS Class E630-16 coated electrodes, composition, physical and mechanical properties, uses, heat treatment, and corrosion resistance.

What are AWS Class E630-16 Coated Electrodes?

AWS Class E630-16 is a type of coated electrode used in arc welding and other related metal production operations. It has been designed to meet the American Welding Society’s stringent requirements. The electrodes are made from mild or low alloy steel, which provides outstanding mechanical properties for strength, flexibility and impact resistance. They feature an iron powder core surrounded by a heavy coating of mineral oxide fluxes that helps to promote smoother arc initiation, reduce spatter and improve weldability for better performance results in most applications. The 50 words summary – AWS E630-16 coated electrodes provide great mechanical features & weldability; made from steel with iron core & o/xide coating; greater smoothness, less spatter, stronger performance!

AWS Class E630-16 Coated Electrodes Composition

AWS Class E630-16 welding wire is used for welding high-strength low-alloy steels. The electrode is also commonly known as the AWS E90T5-B9 electrode. AWS Class E630-16 coated electrodes are formulated from low-alloy nickel, molybdenum, chromium, iron, carbon, and manganese. These elements combine to create a strong, malleable weld and resist high temperatures.

Carbon (C)

0.03

Chromium (Cr)

16.58

Copper (Cu)

3.55

Iron (Fe)

Balance

Manganese (Mn)

0.56

Molybdenum (Mo)

0.20

Nickel (Ni)

4.78

Niobium (Nb)

0.24

Nitrogen (N)

0.04-0.08

Phosphorous (P)

0.018

Silicon (Si)

0.44

Sulfur (S)

0.02

AWS Class E630-16 Welding Electrodes Physical Properties

The physical properties of AWS Class E630-16 alloy are impressive. The electrodes have a diameter range of 1.6mm to 4mm and are designed to produce a weld with low hydrogen content. The electrodes are also coated with a flux that helps to protect the metal from oxidation and other contaminants during welding.

AWS Class E630-16 Coated Electrodes Mechanical Properties

AWS Class E630-16 electrodes have exceptional mechanical properties too. They can withstand high-stress levels and deliver an excellent tensile strength of up to 800 MPa. Furthermore, the electrodes can operate under extreme temperatures, making them suitable for welding in harsh conditions.

Tensile Strength
MPa (ksi)
Elongation
%
930 (135) min. 7 min.
980 (142) 16

AWS Class E630-16  Welding Electrodes Trade Names

Class UNS Oxford Alloys
E630-16 W37410 Alloy 630-16

AWS Class E630-16 Coated Electrodes Parameters

Diameter

Length

Amperage
Flat Vertical & Overhead
3/32”

12”

70-85 65-75
1/8”

14”

85-110 80-90
5/32”

14”

110-140 100-120
3/16”

14”

120-160 110-130

AWS Class E630-16 Welding Electrodes Uses

The uses of AWS Class E630-16 wire are diverse. They are commonly used to fabricate structural components, such as bridges, buildings, and pipelines. The electrodes are also suitable for welding pressure vessels, boilers, and other heavy-duty industrial equipment. AWS Class E630-16 coated electrodes are ideal for welding low-alloyed steels with a yield strength of up to 550 MPa.

AWS Class E630-16 Coated Electrodes Heat Treatment

Heat treatment is critical when working with AWS Class E630-16 filler wire. The electrodes must undergo post-weld heat treatment to ensure that the weld joint has the required strength and toughness. Generally, the heat treatment involves heating the steel to a specific temperature and then cooling it down slowly. The heat treatment process also helps to relieve internal stresses and minimize the risk of distortion.

AWS Class E630-16 Welding Electrodes Corrosion Resistance

AWS Class E630-16 filler metal are also known for their corrosion resistance properties. The low-alloy elements in the electrodes make them corrosion-resistant, even when exposed to harsh environments. The electrodes can resist atmospheric corrosion, seawater corrosion, and corrosive gases, making them popular for welding in offshore and marine applications.

Conclusion

AWS Class E630-16 coated electrodes are an excellent choice for welding high-strength low-alloy steels. They have impressive physical and mechanical properties, making them suitable for various applications. Additionally, AWS Class E630-16 coated electrodes are corrosion-resistant and can withstand harsh environments. However, following the correct welding procedures, including post-weld heat treatment, is essential to ensure that the weld joint has the required strength and toughness.

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