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AWS Class ER309LSi MIG & TIG Welding Wire – Composition, Properties, and Uses

AWS Class ER309LSi MIG & TIG

AWS Class ER309LSi MIG & TIG is a popular metal filler material used in welding. It belongs to the austenitic stainless steel family and comprises nickel, chromium, and manganese. This metal filler material is often used in welding dissimilar metals and is preferred for its high corrosion-resistant properties. This blog post will explore the composition, physical and mechanical properties, uses, heat treatment, and corrosion-resistant properties of AWS Class ER309LSi MIG & TIG.

What is AWS Class ER309LSi MIG & TIG?

AWS Class ER309LSi MIG & TIG is a type of stainless steel wire used in welding applications. It has an alloy composition of 25% chromium, 9.5% nickel and 0.6% silicon, which creates excellent corrosion resistance against various acids and other corrosive agents. In addition to having good weldability characteristics, it also provides superior arc stability over other stainless steel alloys when performing GMAW (MIG) or GTAW (TIG) welding processes due to its high heat, oxidation and wear resistance capabilities. This type of wire is often preferred for applications such as food processing equipment, kitchen appliances, medical instruments and laboratory equipment due to its superior material properties compared to traditional carbon steels when exposed to corrosive materials frequently.

ER309LSi MIG & TIG Welding Wire Composition

AWS Class ER309LSi MIG & TIG welding wire comprises 22-25% chromium and 12-14% nickel. It also contains small percentages of manganese and silicon. The material is designed to weld high-temperature alloys with low carbon content.

C Cr Ni Mo Mn Si P S Cu
0.12 23.0-25.0 12.0-14.0 0.75 1.0-2.5 0.65-1.00 0.03 0.03 0.75

ER309LSi MIG & TIG Coated Wire Physical Properties

AWS Class ER309LSi MIG & TIG welding electrode has an austenitic microstructure and high tensile strength. The melting point of this material is around 1,400°C, and it has a density of 7.9 g/cm³. The material is also non-magnetic.

ER309LSi MIG & TIG Welding Wire Mechanical Properties

The mechanical properties of AWS Class ER309LSi MIG & TIG electrode are impressive. It has good wear resistance and excellent corrosion resistance properties. It also has high tensile strength, perfect for welding dissimilar metals. Additionally, the material has a low coefficient of thermal expansion, making it ideal for high-temperature applications.

Yield, kpsi: 564
Tensile Strength, kpsi: 87
Elongation%, min: 41

ER309LSi MIG & TIG Coated Wire Trade Name

Class UNS Oxford Alloys SANDVIK BOHLER UTP
ER309LSi S30988 Alloy 309LSi EXATON 24.13.LSI BOHLER THERMAINT 25/14 E-309LSI UTP A6824 LC

ER309LSi 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

ER309LSi MIG & TIG Coated Wire Uses

AWS Class ER309LSi MIG & TIG wire  is commonly used in various industries. It is often used in the petrochemical, construction, and energy sectors. The material is also used in the pipe welding, food processing, and pharmaceutical industries. It is well suited for welding austenitic stainless steel and carbon steel alloys.

ER309LSi MIG & TIG Welding Wire Heat Treatment

AWS Class ER309LSi MIG & TIG filler wire  is a high-temperature alloy whose final properties depend on how it is cooled. Typically, this material is slowly cooled to prevent warping and cracking. The weld area should cool slowly to keep its properties intact.

ER309LSi MIG & TIG Coated Wire Corrosion Resistant

AWS Class ER309LSi MIG & TIG filler metal is highly resistant to corrosion, making it well suited for use in corrosive environments. It possesses excellent resistance to chloride ion stress corrosion cracking and is also resistant to pitting and crevice corrosion.

Conclusion

This blog post has explored the composition, physical and mechanical properties, uses, heat treatment, and corrosion-resistant properties of AWS Class ER309LSi MIG & TIG. This metal filler material is highly versatile and can be used in various industries. It’s excellent corrosion resistance and high-temperature properties make it a popular choice for welding dissimilar metals. Any professional welder should be aware of AWS Class ER309LSi MIG & TIG and its properties, as it is widely used in many industries.

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