#4 Best Cast Iron Skillet – Staub Cast Iron 10-inch Fry Pan The Best Matte Enamel Coating! Staub cookware, along with Le Creuset, also began in France, and over the years the name has become synonymous with high quality and aesthetically pleasing cast iron cookware.
Waupaca Foundry produces gray, ductile and compacted graphite iron castings. The difference in these types of iron is the characteristics of the graphite used in the material. Gray Iron. Gray iron is called that because when it is fractured, its surface appears a dull gray color.
Ductile Iron is a type of cast iron known for its impact and fatigue resistance, elongation, and wear resistance due to the spherical (round) graphite structures in the metal. Ductile Iron is also called ductile cast iron, spheroidal graphite cast iron, or nodular cast iron.
Grey cast iron (a.k.a. gray iron) is a type of iron found in castings known for its grey color and appearance caused by graphite fractures in the material. Specifically, what makes grey iron “grey iron,” is the graphite flake structure that is created during the cooling process from the carbon that is in the component.
What is malleable cast iron? Malleable cast iron is produced from white cast iron, which is made from hot liquid iron with certain chemical components. The white cast iron needs to be treated by malleablizing, such as graphitizing or oxidation and decarbonization, then its metallographic structures or chemical components will be changed, so can become into malleable cast iron.
Cast iron's properties are changed by adding various alloying elements, or alloyants. Next to carbon, silicon is the most important alloyant because it forces carbon out of solution. A low percentage of silicon allows carbon to remain in solution forming iron carbide and the production of white cast iron.