SC-40

SC-40 may refer to:


 * ISO/IEC JTC 1/SC 40, a standardization subcommittee of the ISO/IEC JTC 1 on IT Service Management and IT Governance
 * SC-40, a computer developed by Systems Concepts
 * USS SC-40, a United States Navy submarine chaser commissioned in 1918 and sold in 1924
 * Scandium-40 (Sc-40 or 40Sc), an isotope of scandium