SAE J121
Decarburization in Hardened and Tempered Unified Threaded Fasteners
Developed by committee: Fasteners Committee
Annotation and contents
Source of this annotation and contents: SAE.
This SAE Recommended Practice covers methods for measuring, classifying, and specifying decarburization in the threaded section of hardened and tempered steel bolts, screws, studs, and similar parts. It is not intended to cover products which are specifically carburized to achieve special properties.
Rationale:
Superseded by ASTM F2328 Standard Test Method for Determining Decarburization and Carburization in Hardened and Tempered Threaded Steel Bolts, Screws and Studs
