Cold Rolled Steel Sheet Tensile Strength

Jfe steel has developed continuous annealing equip ment1 3 which is necessary in the manufacture of high strength steel sheets and was among the first to com mercialize and expand the use of ultra high strength.

Cold rolled steel sheet tensile strength.

Cold rolled super high tensile strength steel sheet with the level forming formability is at the top level in the industry. 780 1470 n mm grade cold rolled ultra high tensile strength steel sheet. This material is used in hot stamping applications to achieve final ultimate tensile strength approaching 1500 mpa. For this reason steel sheets with tensile strength ts of 980 mpa and higher are frequently used in the cabin structure.

The main advantages of cold working are. In comparison a cold rolled steel product with the same chemical composition has a yield strength of 365 mpa. Yield strength tensile strength and ductility values for steels at room temperature. The steel s strength is obtained by water quenching from an austenitic temperature resulting in a martensitic microstructure.

As an example a hot rolled steel product may have a yield strength of 235 mpa. 2 cold rolled steels product description. Press hardenable steels phs press hardenable steel phs commonly referred to as mn22b5 or 15b22 is available as cold rolled full hard or annealed and tempered. The yield strength and tensile strength of cold rolled will be higher than hot rolled.

Ductility is the extent to which a material can undergo plastic deformation specifically how far a material can be plastically deformed before fracture. However when cold rolled the tensile strength can increase to 85 000 psi with a yield strength of 70 000 psi. However the ductility of a cold rolled steel is decreased. 1 1 this specification covers a cold rolled ultra high strength carbon steel sheet in coils or cut lengths.