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Title 49 Part 179 → Subpart C → §179.100-7

Title 49 → Subtitle B → Chapter I → Subchapter C → Part 179 → Subpart C → §179.100-7

Electronic Code of Federal Regulations e-CFR

Title 49 Part 179 → Subpart C → §179.100-7

e-CFR data is current as of November 19, 2019

Title 49Subtitle BChapter ISubchapter CPart 179Subpart C → §179.100-7


Title 49: Transportation
PART 179—SPECIFICATIONS FOR TANK CARS
Subpart C—Specifications for Pressure Tank Car Tanks (Classes DOT-105, 109, 112, 114 and 120)


§179.100-7   Materials.

(a) Steel plate: Steel plate materials used to fabricate tank shell and manway nozzle must comply with one of the following specifications with the indicated minimum tensile strength and elongation in the welded condition. The maximum allowable carbon content must be 0.31 percent when the individual specification allows carbon greater than this amount. The plates may be clad with other approved materials.

Specifications Minimum tensile strength (p.s.i.) welded condition1Minimum elongation in 2 inches (percent) welded condition (longitudinal)
AAR TC 128, Gr. B81,00019
ASTM A 3022, Gr. B80,00020
ASTM A 516270,00020
ASTM A 5372, Class 170,00023

1Maximum stresses to be used in calculations.

2These specifications are incorporated by reference (IBR, see §171.7 of this subchapter).

(b) Aluminum alloy plate: Aluminum alloy plate material used to fabricate tank shell and manway nozzle must be suitable for fusion welding and must comply with one of the following specifications (IBR, see §171.7 of this subchapter) with its indicated minimum tensile strength and elongation in the welded condition. *  *  *

SpecificationsMinimum tensile strength (p.s.i.) 0 temper, welded condition3 4Minimum elongation in 2 inches (percent) 0 temper, welded condition (longitudinal)
ASTM B 209, Alloy 5052125,00018
ASTM B 209, Alloy 5083238,00016
ASTM B 209, Alloy 5086135,00014
ASTM B 209, Alloy 5154130,00018
ASTM B 209, Alloy 5254130,00018
ASTM B 209, Alloy 5454131,00018
ASTM B 209, Alloy 5652125,00018

1For fabrication, the parent plate material may be 0, H112, or H32 temper, but design calculations must be based on minimum tensile strength shown.

20 temper only.

3Weld filler metal 5556 must not be used.

4Maximum stress to be used in calculations.

(c) High alloy steel plate. (1) High alloy steel plate must conform to the following specifications:

SpecificationsMinimum tensile strength (p.s.i.) welded condition1Minimum elongation in 2 inches (percent) weld metal (longitudinal)
ASTM A 240/A 240M (incorporated by reference; see §171.7 of this subchapter), Type 304L70,00030
ASTM A 240/A 240M (incorporated by reference; see §171.7 of this subchapter), Type 316L70,00030

1Maximum stresses to be used in calculations.

(2)(i) High alloy steels used to fabricate tank must be tested in accordance with the following procedures in ASTM A 262, “Standard Practices for Detecting Susceptibility to Intergranular Attack in Austenitic Stainless Steel” (IBR, see §171.7 of this subchapter), and must exhibit corrosion rates not exceeding the following: *  *  *

Test proceduresMaterialCorrosion rate i.p.m.
Practice BTypes 304L and 316L0.0040
Practice CType 304L0.0020

(ii) Type 304L and 316L test specimens must be given a sensitizing treatment prior to testing.

(d) All attachments welded to tank shell must be of approved material which is suitable for welding to the tank.

[Amdt. 179-10, 36 FR 21344, Nov. 6, 1971, as amended by Amdt. 179-32, 48 FR 27707, June 16, 1983; Amdt. 179-47, 58 FR 50237, Sept. 24, 1993; Amdt. 179-52, 61 FR 28679, June 5, 1996; Amdt. 179-52, 61 FR 50255, Sept. 25, 1996; 66 FR 45186, Aug. 28, 2001; 67 FR 51660, Aug. 8, 2002; 68 FR 75759, Dec. 31, 2003]


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