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The solid carburizing process is performed to obtain the hardening of the surface layer of the steel with low carbon content. Thus, the steel is heated to temperatures above 900 ° C in contact with a fuel rich in carbon agent. After the thermal dissociation reaction and consequent release of gas occurs as carbon monoxide (CO), carbon dioxide (CO2) and nitrogen dioxide (NO2), in addition to the compound oxide of sodium (Na2O). This study estimated the composition of the gases generated by analyzing the Information Sheets Security of Chemicals (MSDS); then the reactions involved were stoichiometrically analyzed and the results were compared to the permitted emission levels tables according to the Regulatory Standard: NR-15 (Unhealthy Activities and Operations). The discussion on the gas more harmful to human health can facilitate studies and proposals for choosing Personal Protective Equipment (PPE), as well as the determination of the maximum exposure times professional. Keywords: Thermochemical Treatments; Safety at Work; Personal Protective Equipment and Collective; Regulatory Standard; Unhealthiness.

Estudos dos Gases Produzidos no Processo de Endurecimento do Aço SAE por Meio de Cementação Sólida