AWS Class ER309LSi MIG and TIG Filler Welding Wire

Conrad Welding Supplies, located in Houston, USA, stands out as a top manufacturer and supplier of AWS Class ER309LSi MIG and TIG Filler Welding Wire. This wire is specifically crafted for joining dissimilar metals and stainless steels to carbon or low-alloy steels. With its low carbon and high silicon content, ER309LSi is known for delivering excellent arc stability, minimizing spatter, and creating a smooth bead finish. Conrad takes pride in ensuring that every spool of wire adheres to strict quality standards, making it a trusted option for essential welding tasks in industries like petrochemical, construction, and food processing.

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AWS Class ER309LSi MIG and TIG Filler Welding Wire Specification

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

What is AWS Class ER309LSi MIG and TIG Filler Welding Wire?

ER309LSi is an austenitic stainless steel filler wire that contains about 23% chromium, 13% nickel, and a low carbon content (≤0.03%), along with added silicon (around 0.85–1.2%) to enhance weldability. This unique blend offers remarkable corrosion resistance, particularly in situations where dissimilar metals are being welded together. The wire boasts good tensile strength (typically between 80–90 ksi), strong oxidation resistance, and excellent control over the weld pool, making it ideal for both manual and automated MIG and TIG welding processes.

AWS Class ER309LSi MIG and TIG Filler Welding Wire Equivalent Grade

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

If You Are Looking To Buy High Quality
Electrodes and Filler Wire

We provide products that come with both mill test certificates and third-party test certificates, ensuring the highest standards of quality and compliance.

AWS Class ER309LSi MIG and TIG Filler Welding Wire Chemical Composition

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

AWS Class ER309LSi MIG and TIG Filler Welding Wire Mechanical Properties

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

AWS Class ER309LSi MIG & TIG Filler Metal Parameters

Diameter		Process	Volt	Amps
in	(mm)	Process	Volt	Amps
.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

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Top Manufacturer and Supplier of AWS Class ER309LSi MIG and TIG Filler Welding Wire in Houston , USA

Conrad Welding Supplies is a Top manufacturer and supplier of high-quality AWS Class ER309LSi MIG and TIG Filler Welding Wire in Houston , USA. Specializing in welding solutions, we provide a wide range of products, including coated electrodes, welding electrodes, flux core, MIG & TIG welding wires, SAW flux and filler wires. Known for our reliable delivery and superior customer service, We are committed to offering top-tier welding materials that ensure durability and performance across a wide range of industrial applications. We strive to meet the highest standards, making us a trusted partner for all your welding needs.

Modern Equipments

Well Maintained

Expert Engineers

Efficient Factories

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AWS Class ER309LSi MIG and TIG Filler Welding Wire Uses

You’ll find ER309LSi welding wire commonly used for welding dissimilar metals, such as stainless steel to carbon steel, and for creating overlay and buffer layers in cladding applications. It’s frequently applied in heat exchangers, furnace components, pressure vessels, and piping systems across chemical, food-grade, and industrial fabrication sectors. The low carbon content helps to minimize carbide precipitation, which reduces the risk of intergranular corrosion, while the high silicon content enhances fluidity for clean and visually appealing welds. ER309LSi guarantees high-quality, durable joints in demanding fabrication environments where both strength and corrosion resistance are essential.

Industry We Serve

We provide high-quality electrodes, filler wire, MIG and TIG welding wires to a wide range of industries, including oil and gas, food, marine, petrochemical, power generation, and aerospace.