1 Not all adenomas produce excess T-4, and doctors aren't sure what causes some to begin producing too much hormone. 2  Thyroiditis. 3  Sometimes your thyroid gland can become inflamed for unknown reasons. 4  The inflammation can cause excess thyroid hormone stored in the gland to leak into your bloodstream.
Forged steel is an alloy of carbon and iron that is compressed under extreme pressure to make a very hard and strong substance. It has been used for thousands of years to create all types of materials.
Answer: The terms cast and forged simply refer to the manufacturing process used to form the shape of the clubhead of a golf iron. Casting always involves turning the metal from which the ironhead is to be made into its molten, liquid state, after which it is poured into a mold to form the ironhead design.