ThePipingMart Blog Welding Electrodes AWS Class E312-16 Coated Electrodes – Composition, Properties, and Uses

AWS Class E312-16 Coated Electrodes – Composition, Properties, and Uses

AWS Class E312-16 Coated Electrodes

Welding is a crucial process in many industries, and with the right equipment and materials, welders can produce high-quality, durable results. One essential material for welding is the coated electrodes used to join different metals. AWS Class E312-16 Coated Electrodes are popular for their excellent properties and versatility among the many types of electrodes available. This blog post will explore the composition, physical and mechanical properties, uses, heat treatment, and corrosion resistance of AWS Class E312-16 Coated Electrodes.

What are AWS Class E312-16 Coated Electrodes?

AWS E312-16 Coated Electrodes are a type of coated electrode frequently used in welding operations. They provide an extra layer of protection to the weld by creating a chemical reaction with the base metal, allowing for strong bonds and preventing oxidation. The coating also protects against porosity, weakening welds and leading to cracks. E312-16 electrodes are designed for high-strength applications such as thick plates and stainless steel structures. They provide superior arc stability compared to other types of electrodes, making them ideal for tough fabrication projects.

E312-16 Coated Electrodes Composition

AWS Class E312-16 filler wire is a type of stainless steel electrode that contains around 30% chromium and 9% nickel. These ingredients make it highly resistant to corrosion, especially in acidic environments. It also contains around 0.08% carbon, which makes it suitable for welding different types of metal. The electrode coating, usually made of rutile or cellulose, provides additional protection and facilitates welding electrodes.

C Cr Ni Mo Mn Si P S Cu


28.0-32.0 8.0-10.5 0.75 0.5-2.5 1.00 0.04 0.03 0.75

E312-16 Welding Electrodes Physical Properties

AWS Class E312-16 has excellent physical properties, making it an ideal choice for welding alloy in harsh environments. It has a tensile strength of around 90,000 psi, yield strength of 75,000 psi, and an elongation of 30%. It also has a melting point of around 3,000 degrees Fahrenheit, ensuring it remains stable and durable under high heat.

E312-16 Coated Electrodes Mechanical Properties

Regarding mechanical properties, AWS Class E312-16 is a top-performing electrode. It has high impact resistance, which means it can withstand sudden heavy loads without breaking. It also has excellent toughness, ensuring it remains intact even in harsh conditions. Moreover, it has good ductility, which makes it easy to bend and shape as required.

Yield Strength 109,000 psi
Tensile Strength 78,000 psi
Elongation 23%

E312-16 Welding Electrodes Trade Names

Class UNS Oxford Alloys BOHLER
E312-16 W31310 Alloy 312-16 BOHLER FOX CN 29/9-A E312-17

E312-16 Coated 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

E312-16 Welding Electrodes Uses

AWS Class E312-16 Coated Electrodes are popularly used in various industries where corrosion resistance and durability are essential. They are ideal for welding stainless steel components, especially in the chemical and food processing sectors where high temperatures and corrosive elements are present. They are also suitable for welding metals like cast iron, stainless steel, and low-alloy steel.

E312-16 Coated Electrodes Heat Treatment

AWS Class E312-16 filler metal do not require special heat treatment after welding wire. However, it is essential to preheat the metal surface to prevent thermal shock, which can lead to cracks and distortion. Preheat around 200 to 300 degrees Fahrenheit, recommended to ensure optimal results.

E312-16 Welding Electrodes Corrosion Resistant

AWS Class E312-16 Coated Electrodes are often used in corrosion-prone environments. Their high chromium and nickel content make them ideal for resisting corrosion caused by chemicals, saltwater, and acid. Additionally, their protective coating helps prevent rust or oxidation, enhancing their corrosion resistance properties.


AWS Class E312-16 Coated Electrodes are an excellent choice for welders who need to produce durable, corrosion-resistant joints. Their composition, physical and mechanical properties, uses, heat treatment, and corrosion resistance make them popular in different industries. Whether working in the food processing, chemical, or construction industry, AWS Class E312-16 Coated Electrodes can help you achieve high-quality and long-lasting results. So the next time you are looking for the perfect electrodes for your welding project, consider AWS Class E312-16 Coated Electrodes for optimal performance.

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