Agenda Item #
This document is under review as revision to an API Standard; it is under consideration within an API technical committee but has not received all approvals required for publication. This document shall not be reproduced or circulated or quoted, in whole or in part, outside of API committee activities except with the approval of the Chairman of the committee having jurisdiction and staff of the API Standards Dept. Copyright API. All rights reserved.
650-2022
Agenda Item:
Title:
Date:
Discontinued Material A678
3/11/15
Contact: Name: Ron Santelik
Company: Westway Terminals
Phone:
E-mail:
708-297-5930 rsantelik@earthlink.net
Purpose: Remove references to discontinued material from API 650
Source: John Lieb email dated 1/20/15, Tank Industry Consultants
Revision: 0
Impact: Neutral
Rationale: Remove references to discontinued steel from standard
Proposal: Delete references and tables referring to A678 steel from API 650
SECTION 2 – NORMATIVE REFERENCES
ASTM A678M/A678, Quenched and Tempered Carbon-Steel and High-Strength Low-Alloy Steel
Plates for Structural Applications
4.2.2 ASTM Specifications
j) ASTM A678M/A678, Grade A, for plates to a maximum thickness of 40 mm (1.5 in.) (insert plates to a maximum thickness of 65 mm [2.5 in.]) and Grade B for plates to a maximum thickness of 45 mm (1.75 in.) (insert plates to a maximum thickness of 65 mm [2.5 in.]). Boron additions are not permitted.
Table 4.4a – Material Groups (SI)
G40.21-300W 8 E355D A678M A
G40.21-350W 8 S275 J2 8 A678M B 12
Table 4.4b – Material Groups (USC)
G40.21-44W 8 E355D A678M A
G40.21-50W 8 S275 J2 8 A678M B 12
Table 5.2a – Permissible Plate Materials and Allowable Stresses (SI)
A678M A 345 485 A 194 208
A678M B 415 550 A 220 236 a. By agreement between the Purchaser and the Manufacturer, the tensile strength of ASTM A537M, Class 2,
A678M, Grade B , and A841M, Class 2 materials may be increased to 585 MPa minimum and 690 MPa maximum. The tensile strength of the other listed materials may be increased to 515 MPa minimum and 620 MPa maximum. When this is done, the allowable stresses shall be determined as stated in 5.6.2.1 and 5.6.2.2.
Table 5.2b – Permissible Plate Materials and Allowable Stresses (USC)
A678 A 50,000 70,000 A 28,000 30,000
A678 B 60,000 80,000 A 32,000 34,300
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This document is under review as revision to an API Standard; it is under consideration within an API technical committee but has not received all approvals required for publication. This document shall not be reproduced or circulated or quoted, in whole or in part, outside of API committee activities except with the approval of the Chairman of the committee having jurisdiction and staff of the API Standards Dept. Copyright API. All rights reserved.
a By agreement between the Purchaser and the Manufacturer, the tensile strength of ASTM A537M, Class 2, A678M,
Grade B , and A841M, Class 2 materials may be increased to 85,000 psi minimum and 100,000 psi maximum. The tensile strength of the other listed materials may be increased to 75,000 psi minimum and 90,000 psi maximum. When this is done, the allowable stresses shall be determined as stated in 5.6.2.1 and 5.6.2.2.
5.7.4.6 When used in stress-relieved assemblies, the material of quenched and tempered steels
A537, Cl 2, and A678 , Grade B, and of TMCP steel A841 shall be represented by test specimens that have been subjected to the same heat treatment as that used for the stress relieved assembly.
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