FIELD: foundry. SUBSTANCE: technological sample is cast without extraction of graphite. It is subjected to graphitization annealing at temperature 940-1120 C. Value of elongation of sample is measured and content of carbon in pig iron is found by it. For speed-up of annealing liquid pig iron intended for casting of technological sample is injected with additive containing graphitization elements. EFFECT: enhanced authenticity of determination of carbon content during smelting. 2 cl
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