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AWS Class ER316LSi MIG & TIG Welding Wire – Composition, Properties, and Uses

AWS Class ER316LSi MIG & TIG

AWS Class ER316LSi MIG & TIG welding wires are the latest rages in the welding industry. These wires have many features, like excellent weld quality, good mechanical properties, and high corrosion resistance. In this blog post, we will delve deeper into this welding wire’s properties, uses, and heat treatment to help you decide your welding needs.

What is AWS Class ER316LSi MIG & TIG?

AWS ER316LSi is an austenitic stainless steel wire used in MIG and TIG welding. It has a low carbon content, excellent corrosion resistance, high pitting resistance, and high-temperature performance. It is particularly well suited for welding applications where sensitization of the weld joint must be avoided, such as food service and healthcare equipment. Its strength makes it suitable for joining many types of steels, including 304L & 316L series stainless steels and high-chromium nickel alloys (Hastelloy®). It provides superior mechanical properties at cryogenic temperatures compared to other austenitic alloy grades of stainless steel.

ER316LSi MIG & TIG Welding Wire Composition

Composition AWS Class ER316LSi MIG & TIG: AWS Class ER316LSi MIG & TIG welding wires comprise a special blend of 18% chromium and 12% nickel, and small molybdenum. These wires also contain around 2-2.5% silicon, which helps improve the wetting and flow of the wire during welding.

C Cr Ni Mo Mn Si P S
0.03 18.0-20.0 11.0-14.0 2.0-3.0 1.0-2.5 0.65-1.0 0.03 0.03

ER316LSi MIG & TIG Coated Wire Physical Properties

Physical Properties AWS Class ER316LSi MIG & TIG: AWS Class ER316LSi MIG & TIG welding filler wires have a diameter range of 0.8mm to 1.6mm. These wires come in spools or straight lengths and are typically used in TIG or MIG welding electrode techniques. The wires have a shiny appearance and are easy to handle.

ER316LSi MIG & TIG Welding Wire Mechanical Properties

Mechanical Properties AWS Class ER316LSi MIG & TIG: AWS Class ER316LSi MIG & TIG wires have an exceptional tensile strength of 550 MPa, good elongation values, and a low modulus of elasticity. These properties make AWS Class ER316LSi MIG & TIG coated electrode suitable for welding stainless steel and dissimilar metals.

Yield, kpsi: 64
Tensile Strength, kpsi: 90
Elongation%, min: 37

ER316LSi MIG & TIG Coated Wire Trade Name

Class UNS Oxford Alloys SANDVIK BOHLER UTP
ER316LSi S31688 Alloy 316LSi EXATON 19.12.3.LSI BOHLER THERMAINT GE-316LSI UTP A68 MOLC

ER316LSi MIG & TIG Welding Wire Parameters

Diameter Process Volt Amps
in (mm)
.023 (0.6) GMAW 14-19 30-85
.030 (0.8) GMAW 15-20 45-125
.035 (0.9) GMAW 16-22 60-150
.045 (1.14) GMAW 17-22 90-210
1/16” (1.6) GTAW 12 80-150
3/32” (2.4) GTAW 12 150-250
1/8” (3.2) GTAW 12 200-375

ER316LSi MIG & TIG Coated Wire Uses

Uses AWS Class ER316LSi MIG & TIG: AWS Class ER316LSi MIG & TIG welding wires are commonly used for welding alloy 316 and 316L stainless steels. These wires are also used for welding similar alloys like 316Ti, 318, and 347 stainless steel. AWS Class ER316LSi MIG & TIG wires are also used for welding dissimilar filler metals like stainless steel to carbon steel or copper-nickel alloys.

ER316LSi MIG & TIG Welding Wire Heat Treatment

Heat treatment AWS Class ER316LSi MIG & TIG: AWS Class ER316LSi MIG & TIG welding wires are designed to be used without any pre- or post-heat treatment. However, a post-weld heat treatment may be required if welding is a highly stressed application.

ER316LSi MIG & TIG Coated Wire Corrosion Resistance

Corrosion Resistant AWS Class ER316LSi MIG & TIG: AWS Class ER316LSi MIG & TIG welding wires have excellent corrosion resistance, especially in chloride environments. These wires suit petrochemical plants, food processing plants, and marine applications.

Conclusion:

AWS Class ER316LSi MIG & TIG welding wires are versatile materials ideal for welding 316 and 316L stainless steel. With excellent weld quality, good mechanical properties, and high corrosion resistance, these wires can be used in various applications such as petrochemical, food processing, and marine industries. When using AWS Class ER316LSi MIG & TIG wires, following the recommended welding parameters is important to ensure a high-quality weld.

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