FIELD: metallurgy. SUBSTANCE: cobalt-base alloy has, wt.-%: carbon 1.9-2.3; chrome 22-31; tungsten 11.0-11.6; manganese 0.5-1.0; nickel 0.5-1.0; iron 0.3-0.8, and alloy is alloyed additionally with yttrium (0.02-0.06 wt.-%) and zirconium (0.1-0.3 wt.-%). Cast alloy is used for making of stump tool for hot steel and alloy deformation, special cutting tool. EFFECT: increased workability of tool, high stability and safety, enhanced crack-stability of alloy. 3 tbl
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