Supplementary to the heat or cast analysis, a product analysis may be made on steel in the semifinished or finished form. For definitions and methods of sampling steel for product chemical analysis, refer to SAE J408.
A product analysis is a chemical analysis of the semifinished or finished steel to determine conformance to the specification requirements. The range of the specified chemical composition is normally expanded to take into account deviations associated with analytical reproducibility and the heterogeneity of the steel. Individual determinations may vary from the specified heat or cast analysis ranges or limits to the extent shown in Tables 1 through 5. The several determinations of any element in a heat or cast may not vary both above and below the specified range except for lead. Tables 1 through 5 provide permissible limits for various steel forms and composition types.
For rephosphorized and resulfurized steels, the product analysis tolerance limits are not applicable to phosphorus and sulfur because of the degree to which these elements segregate.
Boron is not subject to product analysis tolerances.
Rationale
Table values needed updating to align with referenced ASTM standards.
Permissible variations from specified chemical ranges and limits for carbon steel in hot rolled and cold finished bars and semi-finished products for forging, wire rod, and seamless tubing
Table 2
Permissible variations from specified chemical ranges and limits for carbon steel sheets, strip, and welded tubing
Table 3
Permissible variations from specified chemical ranges and limits for alloy steels
Table 4
Permissible variations from specified chemical ranges and limits for stainless steels (from ASTM A480/A480M)
Table 5
Product analysis tolerances for structural shapes and plates (from ASTM A6)
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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Product Analysis - Permissible Variations from Specified Chemical Analysis of a Heat or Cast of Steel
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Product Analysis - Permissible Variations from Specified Chemical Analysis of a Heat or Cast of Steel
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