This SAE Recommended Practice defines and establishes mechanical property ranges for seven grades of continuously cast high strength automotive sheet steels that can be formed, welded, assembled, and painted in automotive manufacturing processes. The grade of steel specified for an identified part should be based on part requirements (configuration and strength) as well as formability. Material selection should also take into consideration the amount of strain induced by forming and the impact strain has on the strength achieved in the finished part. These steels can be specified as hot-rolled sheet, cold-reduced sheet, uncoated, or coated by hot dipping, electroplating, or vapor deposition of zinc, aluminum, and organic compounds normally applied by coil coating. The grades and strength levels are achieved through chemical composition and special processing. Not all combinations of strength and coating types may be commercially available. Consult your steel supplier for details.
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This document has been determined to contain basic and stable technology which is not dynamic in nature.
PRODUCT CHARACTERISTICS OF HOT-ROLLED SAE J2340 STEEL
TABLE 3
REQUIRED MINIMUM MECHANICAL PROPERTIES OF DENT RESISTANT SHEET STEEL
TABLE 4
REQUIRED MECHANICAL PROPERTIES OF HIGH STRENGTH AND HSLA HOT-ROLLED AND COLD-REDUCED UNCOATED AND COATED SHEET STEEL
TABLE 5
REQUIRED MECHANICAL PROPERTIES OF HIGH STRENGTH RECOVERY ANNEALED COLD-REDUCED SHEET STEEL
TABLE 6
REQUIRED MECHANICAL PROPERTIES OF ULTRA HIGH STRENGTH DUAL PHASE HOT-ROLLED AND COLD-REDUCED SHEET STEEL
TABLE 7
REQUIRED MECHANICAL PROPERTIES OF LOW CARBON MARTINSITE HOT-ROLLED AND COLD-REDUCED SHEET STEEL
TABLE 8
CHEMICAL LIMITS ON UNSPECIFIED ELEMENTS
TABLE 9
TENSILE MACHINE OPERATING PARAMETERS
TABLE A1
TYPICAL MECHANICAL PROPERTIES OF DENT RESISTANT COLD-REDUCED SHEET STEEL
TABLE A2
TYPICAL MECHANICAL PROPERTIES OF ULTRA HIGH STRENGTH DUAL PHASE HOT-ROLLED AND COLD-REDUCED SHEET STEEL
TABLE A3
TYPICAL MECHANICAL PROPERTIES OF ULTRA HIGH STRENGTH LOW CARBON MARTENSITE COLD-REDUCED SHEET STEEL
TABLE A4
TYPICAL INSIDE BEND RADII HIGH STRENGTH AND HSLA, COLD-REDUCED AND HOT-ROLLED AND HIGH STRENGTH RECOVERY ANNEALED COLD-REDUCED UNCOATED AND COATED SHEET STEEL
The Metals Technical Committee (MTC) controls specifications for Ferrous and Non-Ferrous: Metallic Wrought Products, Cast & Sintered Products, Metal Properties & Processes, and Metal Test Procedures. The MTC oversees standards to establish uniform procedures that: 1) establish a common language for the industry to review materials and processes through standards, 2) are reviewed and updated on a regular 5-year basis with coordination to other industry specifications, and 3) creates a common industry interface for technical discussions. The MTC ensures that all standards are developed with qualified personnel to perform respective tasks, meets at least once a year to provide relevant updates to current specifications, and assesses whether new standards are needed by industry. The committee also maintains the public web pages by reviewing and updating the information necessary. The MTC shall report to the Materials Processes and Parts Council (MPPC) on a biannual basis. Participants in the SAE Metals Technical Committee include representatives from OEMs, suppliers, consulting firms, government, and other interested parties.
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Categorization and Properties of Dent Resistant, High Strength, and Ultra High Strength Automotive Sheet Steel
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Categorization and Properties of Dent Resistant, High Strength, and Ultra High Strength Automotive Sheet Steel
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