Malleable Cast Iron

Malleable Cast Iron is a form of Technology and Culture.

Description
Cast iron is too brittle for many applications, but it can be turned into a more malleable form by being heating for several days, and then slowly cooled. The resultant malleable cast iron can then be further worked by bending or stamping, greatly extending the range of objects for which iron is useful.

Effects

 * Increases value of iron and steel trade by 50%