49 CFR Part 178, Appendix A to Part 178 - Specifications for Steel

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View PDF at GPO Pt. 178, App. A
Appendix A to Part 178—Specifications for Steel
Table 1
[Open-hearth, basic oxygen, or electric steel of uniform quality. The following chemical composition limits are based on ladle analysis:]
Designation Chemical composition, percent-ladle analysis
Grade 1 1 Grade 2 1,2 Grade 3 2,4,5
1 Addition of other elements to obtain alloying effect is not authorized.
2 Ferritic grain size 6 or finer according to ASTM E 112-96 (IBR, see § 171.7 of this subchapter).
3 Any suitable heat treatment in excess of 1,100 °F., except that liquid quenching is not permitted.
4 Other alloying elements may be added and shall be reported.
5 For compositions with a maximum carbon content of 0.15 percent of ladle analysis, the maximum limit for manganese on ladle analysis may be 1.40 percent.
6 Rephosphorized Grade 3 steels containing no more than 0.15 percent phosphorus are permitted if carbon content does not exceed 0.15 percent and manganese does not exceed 1 percent.
Carbon 0.10/0.20 0.24 maximum 0.22 maximum.
Manganese 1.10/1.60 0.50/1.00 1.25 maximum.
Phosphorus, maximum 0.04 0.04 0.045.6
Sulfur, maximum 0.05 0.05 0.05.
Silicon 0.15/0.30 0.30 maximum
Copper, maximum 0.40
Columbium 0.01/0.04
Heat treatment authorized (3) (3) (3).
Maximum stress (p.s.i.) 35,000 35,000 35,000.
Check Analysis Tolerances
[A heat of steel made under any of the above grades, the ladle analysis of which is slightly out of the specified range is acceptable if the check analysis is within the following variations:]
Element Limit or maximum specified (percent) Tolerance (percent) over the maximum limit or under the minimum limit
Under minimum limit Over maximum limit
7 Rephosphorized steels not subject to check analysis for phosphorus.
Carbon To 0.15 inclusive 0.02 0.03
Over 0.15 to 0.40 inclusive 0.03 0.04
Manganese To 0.60 inclusive 0.03 0.03
Over 0.60 to 1.15 inclusive 0.04 0.04
Over 1.15 to 2.50 inclusive 0.05 0.05
Phosphorus 7 All ranges 0.01
Sulfur All ranges 0.01
Silicon To 0.30 inclusive 0.02 0.03
Over 0.30 to 1.00 inclusive 0.05 0.05
Copper To 1.00 inclusive 0.03 0.03
Over 1.00 to 2.00 inclusive 0.05 0.05
Nickel To 1.00 inclusive 0.03 0.03
Over 1.00 to 2.00 inclusive 0.05 0.05
Chromium To 0.90 inclusive 0.03 0.03
Over 0.90 to 2.10 inclusive 0.05 0.05
Molybdenum To 0.20 inclusive 0.01 0.01
Over 0.20 to 0.40 inclusive 0.02 0.02
Zirconium All ranges 0.01 0.05
Columbium To 0.04 inclusive 0.005 0.01
Aluminum Over 0.10 to 0.20 inclusive 0.04 0.04
Over 0.20 to 0.30 inclusive 0.05 0.05
[Amdt. 178-3, 34 FR 12283, July 25, 1969; 34 FR 12593, Aug. 1, 1969, as amended by Amdt. 178-64, 45 FR 81573, Dec. 11, 1980; Amdt. 178-97, 55 FR 52728, Dec. 21, 1990; 68 FR 75758, Dec. 31, 2003]

Title 49 published on 2014-10-01

no entries appear in the Federal Register after this date.