When hardening steel in a furnace the structure of the material changes. Generally, by cooling the object down quickly the steel becomes more resistant to mechanical load. For Ipsen atmospheric furnaces for example we produce high-heat resistant chains. These chains transport the charge from the hot area to the cold area. Depending on the weight of the charge 100 links with a division of 1 5/8 inch or another number of links with a division 2 ½ inch are usual. Other link sizes are possible too. For many applicational purposes so-called retorts are used, we produce these from diverse heat resistant materials and in various sizes.