Site Feedback

Title 49

Displaying title 49, up to date as of 9/17/2021. Title 49 was last amended 9/13/2021.

Title 49

eCFR Content

The Code of Federal Regulations (CFR) is the official legal print publication containing the codification of the general and permanent rules published in the Federal Register by the departments and agencies of the Federal Government. The Electronic Code of Federal Regulations (eCFR) is a continuously updated online version of the CFR. It is not an official legal edition of the CFR.

Learn more about the eCFR, its status, and the editorial process.

§ 179.300-7 Materials.

(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:

Specifications2 Tensile strength (psi) welded condition1 (minimum) Elongation in 2 inches (percent) welded condition1 (longitudinal) (minimum)
ASTM A 240/A 240M type 304 75,000 25
ASTM A 240/A 240M type 304L 70,000 25
ASTM A 240/A 240M type 316 75,000 25
ASTM A 240/A 240M type 316L 70,000 25
ASTM A 240/A 240M type 321 75,000 25
ASTM A 285 Gr. A 45,000 29
ASTM A 285 Gr. B 50,000 20
ASTM A 285 Gr. C 55,000 20
ASTM A 515/A 515M Gr. 65 65,000 20
ASTM A 515/A 515M Gr. 70 70,000 20
ASTM A 516/A 516M Gr. 70 70,000 20

(b) [Reserved]

(c) All plates must have their heat number and the name or brand of the manufacturer legibly stamped on them at the rolling mill.

[Amdt. 179-10, 36 FR 21355, Nov. 6, 1971, as amended by Amdt. 179-42, 54 FR 38798, Sept. 20, 1989; Amdt. 179-43, 55 FR 27642, July 5, 1990; Amdt. 179-52, 61 FR 28682, June 5, 1996; Amdt. 179-52, 61 FR 50255, Sept. 25, 1996; Amdt. 179-53, 61 FR 51342, Oct. 1, 1996; 68 FR 75763, Dec. 31, 2003]