49 C.F.R. § 230.26 Tensile strength of shell plates.
Title 49 - Transportation
When the tensile strength of steel or wrought-iron shell plates is not known, it shall be taken at 50,000 psi for steel and 45,000 psi for wrought iron.
Title 49: Transportation
PART 230—STEAM LOCOMOTIVE INSPECTION AND MAINTENANCE STANDARDS
Subpart B—Boilers and Appurtenances
Strength of Materials
§ 230.26 Tensile strength of shell plates.
