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.
The hardness of steel is determined by carbon content. No carbon and it can't be hardened other than by work hardening. Increasing the carbon content from 0.01% to .10% increases the hardenability and the strength. This is then modified by the addition of alloying metals as well as the alloy metals having their own properties.