FIELD: manufacture of hard- alloy tools in metal-working and mining industries. SUBSTANCE: solder comprises carbon, silicon, manganese, copper and iron the ratio of components is the following wt.-%: carbon, 3.5-4.5; silicon, 2.5-5.0; manganese, 0.2-0.6; copper, 4.0-10.0; and iron, the balance. EFFECT: enhanced strength.
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