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Output came to 4.09 million tonnes, compared with 4.12 million tonnes in the same month a year earlier.
The region’s largest steel-producing country, Brazil, saw its crude steel output drop by 2.8% in October compared with the same month last year, to 3.02 million tonnes, according to Worldsteel.
Argentina, in turn, increased its crude steel production by 15.4% in the same comparison, to 477,000 tonnes.
The largest declines in crude steel production were in Peru (28.3%) and Chile (16.9%).
From January to October, South American crude steel output totalled 38.89 million tonnes, down by 1.1% compared with the corresponding period in 2012, when production amounted to 39.31 million tonnes.
Crude steel production in South America fell by 0.8% year-on-year in October, according to figures released by the World Steel Assn (Worldsteel).