Stainless Steel ER 309L Welding Wire

Conrad Welding Supplies, a trusted manufacturer and supplier located in Houston, USA, provides top-notch Stainless Steel ER 309L Welding Wire, specifically designed for welding dissimilar metals and stainless steels while minimizing the risk of intergranular corrosion. This low-carbon variant of ER 309 is perfect for applications that demand exceptional corrosion resistance, crack prevention, and reliable mechanical performance. Renowned for its smooth arc characteristics, low spatter, and impressive weld bead appearance, Conra’s ER 309L wire is suitable for both MIG and TIG welding. Catering to industries across the nation, Conrad Welding Supplies offers dependable, high-performance filler metal solutions for essential fabrication and repair projects.

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Stainless Steel ER 309L Welding Wire Specification

Type	Spool (MIG)				Tube (TIG)
Specification ( MM )	0.8、0.9、1.0、1.2、1.6、2.0				1.6、2.0、2.4、3.2、4.0、5.0
Package	S100/1kg S200/5kg S270,S300/15kg-20kg				5kg/box 10kg/box length :1000MM
Mechanical Properties	Tensile Strength Mpa				Elongation after fracture A（%）
	≥ 520				≥ 30
Diameter（MM）	0.8	1.0	1.2	1.6		2.0	2.5	3.2
Current （A）	70 ~ 150	100 ~ 200	140 ~ 220	50 ~ 100		100 ~ 200	200 ~ 300	300 ~ 400

SS 309L Welding Wire Chemical Compositions of All Weld Metal

Standard：

AWS A 5.9

YB/T5092

Chemical Composition %

Grade

ER309L

≤0.03

1.0 – 2.5

0.3 – 0.65

23 – 25

12 – 14

≤0.03

≤0.75

SS 309L Welding Wire Mechanical Properties of All Weld Metal

UTS	Elongation
(MPa)	(L= 4d)%
570	32.0

What is Stainless Steel ER 309L Welding Wire?

Stainless Steel ER 309L Welding Wire features about 23% chromium and 13% nickel, along with a low carbon content (≤0.03%) to help reduce carbide precipitation and intergranular corrosion. This austenitic wire boasts strong mechanical properties, including a tensile strength of around 570 MPa, good ductility, and excellent toughness. Tailored for MIG and TIG processes, ER 309L ensures consistent arc stability and high-quality welds, particularly when joining stainless steel to carbon steel. It excels in high-temperature and corrosive environments, providing enhanced weld integrity for structural and pressure-bearing applications.

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Top Manufacturer and Supplier of Stainless Steel ER 309L Welding Wire in Houston , USA

Conrad Welding Supplies, based in Houston , USA, is a trusted manufacturer and distributor of Stainless Steel ER 309L Welding Wire, known for its excellent strength, corrosion resistance, and versatility. Our premium ER 309L welding wire is designed for MIG, TIG, and arc welding applications, ensuring durable, high-quality welds across industries such as construction, automotive, shipbuilding, and heavy machinery. Engineered for welding dissimilar metals and stainless steels like 304 to carbon steel, it offers low carbon content to reduce carbide precipitation. Committed to quality, timely delivery, and exceptional service, we provide top-tier ER 309L stainless steel welding wire solutions.

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Expert Engineers

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Types of Stainless Steel ER 309L Welding Wire

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Stainless Steel ER 309L Welding Wire Uses

Stainless Steel ER 309L Welding Wire is commonly utilized in sectors like petrochemical, shipbuilding, power generation, and food processing. It’s ideal for welding stainless steel to carbon or low-alloy steel, creating buffer layers before overlaying, and for components that face heat or corrosive conditions. Typical uses include pressure vessels, heat exchangers, pipelines, and cladding operations. Its low carbon content guarantees resistance to intergranular corrosion, making it suitable for both sanitary and industrial fabrication and repair. ER 309L produces durable, clean, and structurally sound welds, even in the most demanding service conditions.

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.