welding-alloys.com 39 Cobalt based alloys Cobalt based cored wires are mainly alloyed with carbon, chromium and tungsten. However, sometimes they are alloyed with nickel and molybdenum. These alloys are especially suited to applications involving high temperatures, as they retain high hardnesses over time. Chromium provides a protective layer and thus plays an antioxidation role. Chromium, tungsten and molybdenum combine with carbon to create hard carbides. These alloys are ideal for resisting wear caused by metal-to-metal friction at high temperatures and in the presence of abrasives. Product Composition [%] - Co balance Hardness -3 layers C Mn Si Cr W Fe Others as welded work hardened STELLOY 25 0.15 1.5 1 20 14 4 Ni: 9.5 210 HB 38 - 42 HRC STELLOY 21 0.35 1 1 28 3 Ni: 3.2 Mo: 5.5 33 HRC 45 - 48 HRC STELLOY 6 BC 0.9 1 1.2 29 5 3.5 Ni: < 3 36 - 40 HRC STELLOY 6 1.1 1 1.2 29 5 3.5 Ni: < 3 40 - 44 HRC STELLOY 6 HC 1.2 1 1.2 29 5 3.5 Ni: < 3 42 - 46 HRC STELLOY 12 1.5 1 1 30 7.5 3.5 Ni: < 3 44 - 48 HRC STELLOY 1 2.4 1 1.2 28.5 12.5 3.5 Ni: < 3 52 - 55 HRC The technical datasheets for these products are available on our website. The safety datasheets are also available on request. Their low coefficient of friction and their self-polishing tendency, makes them highly scratch-resistant and helps maintain an excellent surface quality. To avoid cracking, any welding operation with this type of filler metal requires preheating. Based on decades of technical knowledge and experience in the production of cored wires, Welding Alloys have globally located R&D and technical teams that are capable of developing a large range of tailored cobalt based wires. Back to contents page
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