Cold Rolled Steel
Cold rolled steel provide excellent thickness and flatness tolerances, surface finish, and press formability. We manufacture low and ultra-low carbon grades to meet a variety of customer formability requirements, specified strength levels, and dent resistance requirements. Each grade can be processed with several surface finishes depending on customer requirements.
Product Applications
Automotive
Product Features
EXCELLENT SURFACE APPEARANCE
Manufacturing controls in place assuring consistent surface quality to satisfy customer requirements.
FORMABILITY
Can be used to produce parts with forming requirements ranging from simple bends to extreme deep drawing.
PAINTABILITY
Due to stringent surface roughness controls, cold rolled steel are readily paintable using an appropriate paint system.
WELDABILITY
Can be joined using accepted welding practices.
Surface Finish, Protection, and Lubrication
Cold rolled steel are manufactured with a matte finish obtained by rolling with specially roughened rolls on both the cold and temper mills. This finish helps to maintain effective lubrication during metal forming and improves the appearance of painted surfaces. Additionally, non-standard finishes are available. To prevent rusting in transit and storage, cold rolled steels are supplied with a rust protective oil film or press forming lubricants. We will apply a rust preventative oil unless otherwise specified.
Formability and Mechanical Properties
COMMERCIAL STEEL (CS)
Commercial Steel (CS Type B) should be used for moderate forming or bending applications. Commercial Steel products are produced from aluminum-killed, continuously cast slabs and, unless otherwise specified, have a carbon content of less than 0.15%. To minimize the occurrence of fluting or stretcher strains during forming, Commercial Steel products are tempered as a normal step in the mill processing.
DRAWING STEEL (DS)
For more severe forming applications, Drawing Steel Type B (DS Type B) should be ordered. Drawing Steel Type B has a controlled carbon content of less than 0.08% and is produced in such a manner that parts formed from DS Type B Steel should not exhibit stretcher strain.
DEEP DRAWING STEEL (DDS)
Deep Drawing Steel is typically produced as a low carbon steel with a max carbon of 0.06%. Interstitial Free (I-F) steel is also allowed at the producer’s discretion but is not required. This type of steel should be ordered for applications that require the most consistent type of low carbon steel.
EXTRA DEEP DRAWING STEEL (EDDS, EDDS+)
Extra Deep Drawing Steel or Extra Deep Drawing Steel Plus (EDDS+) should be ordered for the most demanding forming applications. These steels (also known as Interstitial Free or I-F steels) are produced from a vacuum degassed, stabilized grade. For high strength or structural applications, cold rolled steels are also available in yield strengths up to 50 ksi. (340 MPa).
DENT RESISTANT (DR) AND BAKE HARDENABLE (BR)
Can also be specified as Dent Resistant (DR) or Bake Hardenable (BH) for applications that require dent resistance after forming and painting.
PRESS HARDENABLE STEELS (PHS)
Press Hardenable Steel, commonly referred to as 22MnB5 or 15B22, is available as cold rolled full hard or annealed and tempered. This material is used in hot stamping applications to achieve final ultimate tensile strength (UTS) approaching 1500 MPa.
