One of the top producers and suppliers of stainless steel ER-347 filler wires, designed for welding applications requiring superior corrosion resistance and thermal stability, is Conrad Welding Supplies, based in Houston, USA. With the addition of columbium (niobium), ER-347 is a stabilised austenitic stainless steel filler wire that provides exceptional resistance to carbide precipitation and intergranular corrosion during welding. Conra delivers reliable performance in demanding environments by guaranteeing stringent quality control and adherence to AWS/ASME specifications. The petrochemical, food, power generation, and chemical processing industries all rely on our ER-347 filler wires to produce strong, long-lasting welds under high-temperature conditions.
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Classification : AWS A5.9 ER-347, A5.9M:2006
Soft Wire Diameter Range : 0.06mm – 2.30 mm
Hard Wire Diameter Range : 0.30mm – 3.00mm
Diameter : .035”, .045”, 1/16”, 3/32”, 1/8”, 5/32”
Length : 36″ (914mm) Customized
Materials : ER-347 Stainless Steel
Form : Filler Wires
Iron makes up the majority of stainless steel ER-347 filler wire, with small amounts of columbium (niobium) and tantalum added for stability, along with 18–20% chromium and 9–11% nickel. It provides outstanding defence against stress cracking and intergranular corrosion. Tensile strength of about 620 MPa, yield strength of about 320 MPa, and elongation of about 35% are typical mechanical characteristics. The wire is appropriate for high-heat welding because it maintains good mechanical stability and toughness at high temperatures. In structural and pressure-related applications, ER-347 produces clean, crack-resistant welds with exceptional strength and ductility.
| Grade | C | Cr | Cu | Fe | Mn | Mo | Ni | P | Si | S |
| SS ER-347 | 0.035 | 20.0 | 0.13 | Balance | 1.30 | 0.20 | 10.0 | 0.60 | 0.001 | 0.40 |
| STANDARD | AWS | UNS | DIN | Class | EN | BS |
| SS ER-347 | A5.9 | S34780 | 1.4551 | ER347 | 19 9 Nb | 347S96 |
| Tensile Strength (psi) | Yield Strength (psi) | Percent Elongation in 2” |
| 90,000 psi (621 MPa) | 59,000 psi (407 MPa) | 42% |
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Conrad Welding Supplies is a prominent manufacturer and supplier of top-tier Stainless Steel ER-347 Filler wires in Houston , USA. We specialize in providing advanced welding solutions and offer a wide range of products, including coated electrodes, welding electrodes, flux core, MIG & TIG welding wires, SAW flux, and filler wires. Known for reliable delivery and outstanding customer service, we are committed to offering high-quality welding materials that ensure durability and optimal performance for various industrial applications. Our dedication to excellence has made us a trusted partner for all your welding needs.
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SS ER347 Filler Wires are applied to weld stabilized stainless steels, which provide superior resistance to intergranular corrosion and high-temperature oxidation. Their niobium (columbium) stabilization inhibits carbide precipitation, providing tough and durable welds. The wires find extensive applications in power generation, chemical processing, food processing, marine, and aerospace industries. They are the best for the manufacturing of pressure vessels, heat exchangers, boilers and piping systems that function under severe thermal and corrosive environments, offering greater durability and weld integrity.
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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