309LMo MIG and TIG Filler Welding Wire and Rod

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Ed Stainless manufactures and supplies high-alloy 309LMo MIG and TIG filler welding wire and rod, designed for tough applications involving severe corrosion and high temperatures. Produced in Houston, this specialty filler is made for joining dissimilar metals, buffer layers, and stainless steels exposed to harsh chemicals or chloride-rich environments. It has added molybdenum for better pitting resistance and strength. Ideal for both MIG and TIG welding, 309LMo is used in power generation, pulp and paper, and marine sectors. Ed Stainless offers consistent products, technical support, and quick delivery across the United States.

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309LMo contains about 23% chromium, 13% nickel, 2.5% molybdenum, and ≤0.03% carbon, which improves resistance to localized corrosion like pitting and crevice attack. It delivers excellent mechanical properties, including tensile strength ≥80 ksi, yield strength ≥60 ksi, and 30% elongation. Molybdenum adds strength and durability under cyclic thermal stress and corrosive conditions. Designed for welding duplex, super duplex, and dissimilar steels, 309LMo ensures strong, crack-resistant joints with consistent metallurgical quality in both MIG and TIG applications across various environments.

309LMo MIG and TIG Filler Welding Wire and Rod Specifications

Classification	AWS A5.9, 309LMo
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 309LMo MIG & TIG Filler Metal Application & uses	Hardware tools Metallurgy Machinery Construction Shipbuilding Petroleum Chemical plant Power sector Gas Industry

309LMo MIG and TIG Filler Welding Wire and Rod Chemical Composition

C	Mn	Si	Cr	Ni	S	P	Mo	Cu
0.03 max	1.0-2.5	0.30-0.65	23-25	12-14	0.03 max	0.03 max	2-3	0.75 max

309LMo MIG and TIG Filler Welding Wire and Rod Mechanical Properties

Tensile Strength (psi)	86,000 psi (593 MPa)
Yield Strength (psi)	57,000 psi (393 MPa)
Elongation (%)	42%

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

Why Choose 309LMo MIG and TIG Filler Welding Wire and Rod from Ed Stainless?

Largest Inventory

Customer Support

On Time Deliveries

ISO Certified

Types of 309LMo MIG and TIG Filler Welding Wire and Rod

Stainless Steel 309LMo MIG Filler Wire

Alloy 309LMo MIG filler wire provides excellent corrosion resistance and high-temperature strength, suitable for welding in harsh environments like chemical processing and power generation.

Stainless Steel 309LMo TIG Filler Wire

Alloy 309LMo TIG filler wire offers superior resistance to pitting and crevice corrosion, ideal for high-temperature applications and joining dissimilar metals in challenging environments.

Stainless Steel 309LMo TIG Filler Rod

Alloy 309LMo TIG filler rod delivers robust corrosion resistance and strength, perfect for precision welding in harsh conditions, including chemical processing, petrochemical, and power generation industries.

We conduct extensive in-house testing to ensure that the highest quality standards are achieved by 309L Mo MIG and TIG Filler Welding Wires and Rods. Our customers know that we offer comprehensive third-party inspection services for these products to provide them with the assurance that these products are reliable and performing. We equally hold equal attention with regard to the timely supply of products for which you can place your orders in advance thus enabling you to also plan efficiently the other components of your project.

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309LMo MIG and TIG Filler Welding Wires and Rods Uses

309LMo filler wire and rod are ideal for welding dissimilar steels, buffer layers on carbon steel, and applications involving duplex or molybdenum-bearing stainless steels. It is especially suited for paper mills, desalination plants, offshore oil rigs, and heat exchangers, where better corrosion resistance is crucial. The added molybdenum makes it very resistant to chloride-induced pitting, making it a popular choice in marine and chemical processing settings. 309LMo is also effective in overlay welding, providing corrosion-resistant surfaces on structural parts. Ed Stainless ensures reliable performance and product quality that endures tough service conditions.