{"data":{"id":"us/49-cfr-179.300-7","jurisdiction":"us","citation":"49 CFR 179.300-7","heading":"-7 Materials.","body":"(a) Steel plate material used to fabricate tanks must conform with the following specifications with the indicated minimum tensile strength and elongation in the welded condition. However, the maximum allowable carbon content for carbon steel must not exceed 0.31 percent, although the individual ASTM specification may allow for a greater amount of carbon. The plates may be clad with other approved materials:\nSpecifications 2 Tensile strength (psi) welded condition 1 (minimum) Elongation in 2 inches (percent) welded condition 1 (longitudinal) (minimum)\nASTM A 240/A 240M type 304 75,000 25\nASTM A 240/A 240M type 304L 70,000 25\nASTM A 240/A 240M type 316 75,000 25\nASTM A 240/A 240M type 316L 70,000 25\nASTM A 240/A 240M type 321 75,000 25\nASTM A 285 Gr. A 45,000 29\nASTM A 285 Gr. B 50,000 20\nASTM A 285 Gr. C 55,000 20\nASTM A 515/A 515M Gr. 65 65,000 20\nASTM A 515/A 515M Gr. 70 70,000 20\nASTM A 516/A 516M Gr. 70 70,000 20\n1 Maximum stresses to be used in calculations.\n2 These specifications are incorporated by reference (IBR, see § 171.7 of this subchapter.)\n(b) [Reserved]\n(c) All plates must have their heat number and the name or brand of the manufacturer legibly stamped on them at the rolling mill.","path":["Title 49—Transportation","Subtitle B—Other Regulations Relating to Transportation","CHAPTER I—PIPELINE AND HAZARDOUS MATERIALS SAFETY ADMINISTRATION, DEPARTMENT OF TRANSPORTATION","SUBCHAPTER C—HAZARDOUS MATERIALS REGULATIONS","PART 179—SPECIFICATIONS FOR TANK CARS","Subpart E—Specifications for Multi-Unit Tank Car Tanks (Classes DOT-106A and 110AW)"],"source_url":"https://www.ecfr.gov/api/versioner/v1/full/2026-08-25/title-49.xml","current_through":"2026-08-25","vintage":"","retrieved_at":"2026-08-27T02:26:34Z","sha256":"cc0a028d0afb47a428b8b6d45227edc45abfdb938fcabc707f13d7d84f0bc0ad","source_id":"us-cfr","stale":true,"prev":"us/49-cfr-179.300-6","next":"us/49-cfr-179.300-8"},"notice":"GroundRules: Original legal text. Not legal advice."}