Decarburization - The loss of carbon from the surface of a ferrous alloy. Decarburization is a common surface condition of hot rolled steel and is produced during the heating and                   rolling operations when atmospheric oxygen reacts with the heated surface removing carbon.

Deep Drawing - The process of working metal blanks in dies on a press into shapes which are usually more or less cup-like in character.

Deep Drawing Steel (DDS) - Sheet of this designation should be used when Drawing Steel will not provide a sufficient degree of ductility for fabrication of parts having stringent drawing requirements, or applications that require the sheet be free from aging. This quality is made by special steelmaking and finishing practices.

Dent Resistant - BH Series  - Sheet of this designation is produced from partially stabilized steel and offers a unique combination of as-received formability and final properties after fabrication.  Sheet of this designation combines strength and high formability.  Although this steel is non-aging at room temperature, it gains strength from work hardening during fabrication and from carbon aging during paint baking.  (Sometimes referred to as "bake hardenable.")

Domex Steel - This is very unique steel. Traditionally, steel with higher yield strengths have been difficult to form without cracking. Domex material is processed with special attention given to the grain structure of the steel. This allows for a highly formable material with minimum yield strength of 100,000 psi and a Brinell hardness of 250.

Drawing - Forming recessed parts by forcing the plastic flow of metal in dies.

Drawing Steel (DS) - Sheet of this quality has a greater degree of ductility and is more consistent in performance than Commercial Steel because of higher standards in production, selection and melting of the steel.

DS Type B Steel - Product intended for applications that require particularly severe drawing and forming.

Ductility - The ability to permit change of shape without fracture.  In flat rolled steel, ductility is usually measured by hardness or mechanical properties in a tensile test.