welding-alloys.com 5 Hardness -3 layers All weld metal hardness HRC as welded HRC work hardened HB at 20°C HB at 200°C HB at 400°C HB at 600°C HB at 800°C 21 38 - 42 210 - 260 180 145 130 120 33 45 - 48 300 - 340 280 255 235 220 36 - 40 350 - 380 40 - 44 380 - 415 370 320 255 240 42 - 46 410 - 430 44 - 48 415 - 455 410 370 315 275 52 - 55 495 - 560 465 420 370 330 Hot oxidation Corrosion Cutting Work hardening Machining Description and applications u u u u u u u Low carbon cobalt base. Easy to apply due to its low cracking tendency. Highly resistant to temperature and metal-to-metal wear. Maintains a good level of hardness at high temperatures. Applications: extrusion dies, nozzles, pump shafts. uuuuuu u uu Low carbon cobalt base. Low cracking tendency. Ideal choice for resistance to multiple combinations of stress, such as corrosion and cavitation. Maintains a good level of hardness at high temperatures. Can be work hardened and polished. Low coefficient of friction. Applications: industrial valve work, forging dies and hot shearing blades. u u u u u u Combines all the outstanding properties of cobalt based alloys, including abrasion and erosion resistance. Medium hardness deposit with good machinability. Tailored compositions are also possible by adjusting the carbon content. A lower carbon content facilitates machining. A higher carbon content allows the required hardness to be obtained on low alloy steels from the first layer. Applications: hot shearing tools, petrochemical and industrial valves, valves and valve seats of marine engines, pump sleeves and shafts. u u u u u u u u u u u u u u u u u u u Good resistance to mineral abrasion due to its high hardness. Particularly suited for use on cutting tools. Applications: wood cutting tools, screw conveyors and augers for rubber and plastics, saw blades. u u u u u u u Highest hardness of the cobalt based alloy range, offering excellent resistance to abrasion and corrosion. Self polishing, promotes scratch free sliding of abrasive materials. Applications: rubber kneaders, mixer blades, plastic extrusion screws. Back to contents page
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