Scleroderma refers to a group of rare chronic autoimmune diseases in which the skin and connective tissues tighten and harden; it is a progressive disease. The skin and connective tissues are fibers that make up the framework that supports the body.
Advantages of Carbon Steel compared to other Metals. 1) Faster heating effect. For kitchen use this is especially important as it saves time and reduces the amount of energy used. Stainless Steel, on the other hand, is known to be a poor conductor of heat.
However the above enhancements are dependant on the carbon content which must be limited to 1.7% at normal heat treatment. Beyond this level the excess carbon goes into Free State or forms graphite which has very low tensile strength. The carbon level in plain carbon steel should never increase above 1.5%.