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| Welding wire for sour gas pipeline applications  Hobart Brothers announced that it has developed a gas-shielded metal-cored wire specifically to improve welding performance and quality on sour gas pipeline applications. Metalloy 71 SG wire features high deoxidizer levels that are capable of welding through mill scale and still producing consistent quality welds. The wire also offers excellent wetting characteristics to ensure smooth weld beads with uniform tie-in and help minimize weld defects and their associated rework. Additionally, it generates a low hydrogen weld deposit - 3.3 ml per 100 g of weldment - to help mitigate cracking.Metalloy 71 SG wire is designed for welding in flat and horizontal positions, and can be used in short circuit or pulse applications. It is also usable for welding on non-alloyed and fine grain steels, rail car and heavy equipment manufacturing applications and with robotic welding systems. Hobart Brothers offers the Metalloy 71 SG wire in .045-inch diameters and recommends it for use with a shielding gas mixture of 75 to 95 percent argon and a balance of CO2. It provides a tensile strength ranging from 70 to 87 ksi and a yield strength ranging from 58 to 80 ksi. Specific values depend on the exact shielding gas balance used. It also provides excellent Charpy V-Notch values, ensuring good toughness at temperatures as low as -60 Celsius. Metalloy 71 SG wire is available in both 10- and 33-pound vacuum-packed spools. write your comments about the article :: © 2011 Construction News :: home page |