AWS Class ER309LSi MIG and TIG Filler Welding Wire and Rod

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Chanchai Stainless in Bangkok provides AWS Class ER309LSi MIG and TIG filler wires and rods, developed for joining stainless steel to carbon steel and for overlay applications. With added silicon, these wires improve weld pool fluidity and surface finish. Their low-carbon content enhances corrosion resistance, especially against intergranular attack. These wires are suitable for manual, mechanized, or robotic welding in demanding conditions.

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ER309LSi contains about 23–25% chromium, 12–14% nickel, less than 0.03% carbon, and higher silicon (0.65–1.0%) to improve weld appearance. Weld deposits provide tensile strength in the range of 600–640 MPa along with good ductility and impact strength. The low-carbon design limits the risk of weld decay in corrosive or high-heat conditions.

AWS Class ER309LSi MIG and TIG Filler Welding Wire and Rod Specifications

Classification	AWS A5.9, ER309LSi
Form	MIG spools, TIG cut lengths, Reels and Coils
Type Of Welding	Inert Gas Welding
Current	MIG-DCEP / TIG-DCEN
Diameters	.023”, .030”, .035”, .045”, 1/16”, 3/32”, 1/8”
Standard TIG straight lengths are available	36” (914 mm) or 39” (1000 mm) lengths. Other lengths available upon request.
AWS ER309LSi MIG & TIG Filler Metal Application & uses	Hardware tools Metallurgy Machinery Construction Shipbuilding Petroleum Chemical plant Power sector Gas Industry

AWS Class ER309LSi MIG and TIG Filler Welding Wire and Rod Chemical Composition

C	Cr	Ni	Mo	Mn	Si	P	S	Cu
0.12	24.0-26.0	13.0-15.0	0.75	1.0-2.5	0.65-1.00	0.03	0.03	0.75

AWS Class ER309LSi MIG and TIG Filler Welding Wire and Rod Mechanical Properties

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

We offer These Products as per DIN, ISO, JIS or ANSI Standard.

Why Choose AWS Class ER309LSi MIG and TIG Filler Welding Wire and Rod from Chanchai Stainless?

Largest Inventory

Customer Support

On Time Deliveries

ISO Certified

Types of AWS Class ER309LSi MIG and TIG Filler Welding Wire and Rod

Stainless Steel ER309LSi MIG Filler Wire

Stainless Steel ER309LSi MIG Filler Wire offers high-quality, silicon-enhanced welds for dissimilar metals, providing excellent corrosion resistance and bead appearance in applications like power generation and industrial fabrication.

Stainless Steel ER309LSi TIG Filler Wire

Stainless Steel ER309LSi TIG Filler Wire delivers superior weld quality and corrosion resistance for dissimilar metal joints, ideal for high-temperature and critical applications in industries such as petrochemical and structural fabrication.

Stainless Steel ER309LSi TIG Filler Rod

Stainless Steel ER309LSi TIG Filler Rod ensures strong, corrosion-resistant welds with enhanced fluidity for dissimilar metals, suitable for high-stress applications in power generation, chemical processing, and industrial sectors.

After the production of our AWS Class ER309LSi MIG and TIG Filler Welding Wire and Rod, our quality control team conducts thorough destructive and non-destructive testing using advanced equipment to ensure the superior performance and reliability of the product. Once the testing is complete we carefully package the filler wire and rod using appropriate materials to maintain their quality during shipping. We assure smooth and timely delivery to our customers. Guaranteeing on-time arrival without any delays. All necessary documentation, including certificates and test reports, are provided to the clients upon delivery.

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AWS Class ER309LSi MIG and TIG Filler Welding Wires and Rods Uses

This filler wire is suitable for pressure vessels, heat exchangers, petrochemical equipment, and food processing plants. It’s also used to overlay carbon steel with stainless, providing corrosion-resistant surfaces. ER309LSi is especially valued in fabrication where weld cleanliness, low spatter, and consistent bead appearance are important.