Conrad Welding Supplies, a reputable manufacturer and supplier located in Houston, USA, specializes in high-quality Stainless Steel ER307Si Filler Wires that are perfect for welding dissimilar metals and manganese steels. These wires are celebrated for their impressive strength, outstanding crack resistance, and excellent arc stability, making them a go-to choice for projects that involve dynamic loading and impact. With added silicon to enhance fluidity and bead appearance, Conra’s ER307Si filler wires ensure clean, top-notch welds. Supported by rigorous quality control and reliable nationwide service, Conrad Welding Supplies delivers dependable welding solutions for demanding fabrication and repair tasks across various U.S. industries.
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Classification : AWS A5.9 ER-307Si, 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 : 307Si Stainless Steel
Form : Filler Wire
Typically, Stainless Steel ER307Si Filler Wires are made up of 18–20% chromium, 8–10% nickel, 5–6% manganese, along with increased silicon content to boost wetting and improve weld appearance. This austenitic filler metal boasts excellent mechanical strength, with a tensile strength ranging from 600–700 MPa and high elongation, providing resistance to cracking and work hardening. The higher manganese content enhances weldability on challenging steels, while silicon contributes to better arc stability and slag control. ER307Si wires are compatible with both MIG and TIG processes, yielding smooth, durable welds on dissimilar and alloyed steels, even in tough service conditions.
| Weight% | C | Cr | Ni | Mo | Mn | Si | P | S | N | Cu |
| ER-307Si | 0.04-0.14 | 19.5-22.0 | 8.0-10.7 | 0.5-1.5 | 3.3-4.75 | 0.30-0.65 | 0.03 | 0.03 | – | 0.75 |
| STANDARD | AWS | UNS | DIN | Class | EN | BS |
| SS 307Si | A5.9 | S30780 | 1.4370 | ER307 / ER307Si | 18 8 Mn | 307S94 / 307S98 |
| 0.2% proof stress, Rp0.2% | Tensile strength, Rm | Elongation, 4d/5d | Hardness, HV |
| ≥500MPa. | ≥25% | ≥350MPa. | ~200HV as-deposited ~400HV work-hardened |
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Conrad Welding Supplies is a prominent manufacturer and supplier of top-tier Stainless Steel ER307Si 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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You’ll find Stainless Steel ER307Si Filler Wires widely utilized in sectors like construction, railways, mining, and shipbuilding, where welding of dissimilar steels, high-manganese steels, and work-hardened materials is essential. They excel at joining carbon steel to stainless steel, tool steels, and armor plate, as well as in applications that face high impact and vibration. Common applications include repairs on crushers, undercarriages, railway components, and structural assemblies. With their exceptional crack resistance, toughness, and weldability, ER307Si filler wires are a fantastic option for both fabrication and maintenance welding in demanding or high-stress environments.
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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