EUROPEAN STEEL TECHNOLOGY AND APPLICATION DAYS 2017 - ESTAD 2017

Muffle furnaces are most often used in wire drawing mills. In most cases, protective gas(es) is fed into the muffle tube. This shielding gas can be hydrogen, nitrogen, cracked ammonia or endogas. Some of these gases are very aggressive and will shorten the life of the muffle tubes significantly. In the annealing furnaces, the temperature is usually between 800 and 1,120°C. These aggressive conditions often result in a short service life. As the value of lost production is high, the decision to select a better grade (tube material) will have significant economic return.