High-performance stainless steel ER309LSi welding wire is manufactured and supplied by Conra Welding Supplies, a reputable company based in Houston, USA. Specifically designed for overlay applications and welding dissimilar metals, this wire provides exceptional corrosion resistance and arc stability. Its high silicon content facilitates smoother flow during welding and improves the appearance of weld beads. Conra Welding Supplies produces goods that guarantee reliable performance across a variety of industries by adhering to stringent quality control standards. The business provides welding services to the petrochemical, fabrication, and power generation industries worldwide with a strong emphasis on innovation, dependability, and customer service.
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| 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 | |
Standard： AWS A 5.9 YB/T5092 | Chemical Composition % | ||||||||
C | Mn | Si | Cr | Ni | P | S | Mo | Cu | |
Grade ER 309LSi | ≤0.03 | 1.0 – 2.5 | 0.3 – 0.65 | 23 – 25 | 12 – 14 | ≤0.03 | ≤0.03 | ≤0.75 | ≤0.75 |
| UTS | Elongation |
| (MPa) | (L= 4d)% |
| 570 | 32.0 |
About 23–25% chromium, 12–14% nickel, and a low carbon content (≤0.03%) make up stainless steel ER309LSi welding wire. For better weld fluidity, the wire also contains more silicon (0.65–1.0%). Excellent resistance to oxidation and intergranular corrosion is offered by this composition. Tensile strength of about 570 MPa, yield strength of about 400 MPa, and elongation of about 35% are among the mechanical characteristics. The wire is perfect for precision and structural welding in a variety of applications because it provides smooth, stable arc characteristics and maintains good toughness over a wide temperature range.
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Conrad Welding Supplies, based in Houston , USA, is a trusted manufacturer and distributor of Stainless Steel ER 309LSi Welding Wire, renowned for its superior strength, corrosion resistance, and enhanced weldability. Our high-quality ER 309LSi welding wire is designed for MIG, TIG, and arc welding, offering excellent performance across industries such as construction, automotive, shipbuilding, and heavy machinery. With increased silicon content for improved arc stability and reduced spatter, it is ideal for welding dissimilar metals and stainless steels like 304 to carbon steel. We are committed to delivering premium welding solutions with reliability and exceptional service.
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A common application for stainless steel ER309LSi welding wire is the joining of stainless steel to carbon or low alloy steels. It is perfect for enhancing corrosion resistance in cladding and buffer layer applications. This wire is frequently used in the petrochemical, food processing, pressure vessel, and power generation industries. It is appropriate for both automated and manual welding processes due to its superior weldability, seamless arc transfer, and eye-catching bead finish. Because it ensures long-lasting, flawless joints in demanding service environments, ER309LSi is particularly valued in fabrication work requiring high strength and resistance to heat and corrosion.
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.
Conrad Welding Supplies is a leading manufacturer, supplier and exporter of high-quality Coated Electrodes, Flux Core, MIG & TIG wires, SAW & Flux, Welding Wires, and Filler Wires, catering to various industries in Houston , USA
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