When it comes to welding, the right choice of electrode can make all the difference. AWS Class E308/308H-16 Coated Electrodes are among the top-rated choices among professionals and amateurs alike. However, choosing the right one can seem daunting if you are not well-versed in your welding jargon or the technical specifications of electrodes. In this blog post, we aim to break down all the technicalities and intricacies of AWS Class E308/308H-16 Coated Electrodes so that you can make an informed decision the next time you need to buy one.
What are AWS Class E308/308H-16 Coated Electrodes?
AWS Class E308/308H-16 Coated Electrodes are used in welding applications for stainless steel (austenitic) materials. They are low-hydrogen, all-positional electrodes designed for welding structural and high-temperature steels up to 24mm thick. The coating produces a strong arc force, producing deep penetrations and good bead shapes with minimum spatter. It is also highly resistant to rusting or cracking when subjected to service temperatures of -50°C (-58°F) through 500°C (932°F).
E308/308H-16 Coated Electrodes Composition
AWS Class E308/308H-16 Coated Electrodes are austenitic stainless steel electrodes primarily used for welding stainless steels such as 18Cr-8Ni, AISI Type 304 or 304L. The 308/308H is a low-carbon electrode containing a maximum of 0.04% carbon to prevent intergranular corrosion. H means low hydrogen content to minimize the risk of cold cracking in heat-treated welds.
| C | Cr | Cu | Ferrite | Mn | Mo | Ni | Si |
| 0.04 % | 20 % | 0.10 % | 9 FN % | 1.80 % | 0.30 % | 10 % | 0.50 % |
E308/308H-16 Coated Electrodes Physical Properties
These electrodes are designed to produce a stable arc with a smooth appearance and easy slag removal. AWS Class E308/308H-16 Coated Electrodes have a diameter ranging from 1.6mm to 4.0mm and come in lengths of 250mm or 350mm. They can be used in all welding positions, such as flat, horizontal, vertical, and overhead.
E308/308H-16 Coated Electrodes Mechanical Properties
AWS Class E308/308H-16 Coated Electrodes have excellent mechanical properties such as high tensile strength and elongation. It has a tensile strength of 75,000 psi and an elongation of 40%. Moreover, it operates at a temperature range of -320°F to 350°F.
| – | E308/308H-16 |
|---|---|
| Yield Strength (psi) | 68,000 |
| Ultimate Tensile Strength (psi) | 89,000 |
| Elongation in 2″ (%) | 44 |
E308/308H-16 Coated Welding Electrodes Trade Names
| Class | UNS | Oxford Alloys | BOHLER |
| E308/308H-16 | W30810 | Alloy 308/308H-16 | BOHLER FOX E 308H |
E308/308H-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 |
E308/308H-16 Coated Electrodes Uses
AWS Class E308/308H-16 Coated Electrodes are mainly used in repairing and welding austenitic stainless steel. Its low-carbon content makes it ideal for welding on thin-gauge materials. Its excellent mechanical properties can also be used in many applications, such as piping systems, pressure vessels, chemical equipment, and food processing equipment.
E308/308H-16 Coated Electrodes Heat Treatment
Proper heat treatment is essential for optimal performance from the welded joints. Heat treatment at 1,900°F can soften E308/308H-16 Coated Electrodes and facilitate weldability. After welding and heat treatment, the joints exhibit improved mechanical properties.
E308/308H-16 Coated Electrodes Corrosion Resistant
One of the most significant benefits of E308/308H-16 Coated Electrodes is its corrosion resistance. Welded joints from these electrodes can withstand harsh environments and corrosive substances without heavy oxidation or rusting. This property makes it particularly useful in the food and chemical industries.
Conclusion
AWS Class E308/308H-16 Coated Electrodes are a reliable, economical, and versatile choice of electrodes for welding austenitic stainless steel with excellent mechanical and corrosion properties. Knowing its composition, physical and mechanical properties, usage, heat treatment, and corrosion resistance properties can help you decide when selecting an electrode for your welding needs. By selecting the appropriate electrode, you can ensure quality and long-lasting welds that meet your requirements.
A passionate metal industry expert and blogger. With over 5 years of experience in the field, Palak brings a wealth of knowledge and insight to her writing. Whether discussing the latest trends in the metal industry or sharing tips, she is dedicated to helping others succeed in the metal industry.
