Steel, High Strength, Hot Rolled Sheet and Strip, Cold Rolled Sheet, and Coated Sheet1
This SAE Recommended Practice covers seven levels of high strength carbon and low-alloy hot rolled sheet and strip, cold rolled sheet, and coated sheet steels. The strength is achieved through chemical composition and special processing.
Globalization and Computer Modeling have dramatically affected the steel industry. The types and grades of steel have multiplied with their increase use in the automotive body-in-white (BIW) and chassis. The SAE J1392 specification has served the industry well in defining the original High Strength (HS) and High Strength Low Alloy (HSLA) steels. Developments and requirements of the last 10 years have gone beyond the products described in SAE J1392 with common, commercial use, of new higher strength Dual Phase and Martensitic steels. These new types of steels, the need to design using globally accepted metric designations, and additional formability/modeling requirements to the HS and HSLA steels would require a complete change and rewrite of the specification.
To accomplish the paradigm shift to the steel industry, the SAE Division 32 committee felt it was in the best interests of the automotive industry to create a new specification, SAE J2340, to fully describe the new steels and additional requirements for a global community. Therefore, SAE J1392 is to be declared obsolete.