This work comprises an evaluation of Hispano-Arabic and early Castilian literary evidence in relation to iron and steel technology. The study has led to significant conclusions concerning materials and processes involved in the ferrous metallurgy in al-Andalus and Castile during the time period <i>ca</i> 950-1400.<br><br>Este trabajo ha evaluado fuentes literarias hispano-árabes y castellanas medievales relativas a la tecnología de hierro y acero. El estudio ha rendido conclusiones significativas acerca de la metalurgia férrea en al-Andalus y Castilla durante el período <i>ca</i> 950-1400.