ASTM A678/A678M-05

Standard Specification for Quenched-and-Tempered Carbon and High-Strength Low-Alloy Structural Steel Plates

ABSTRACT
This specification covers quenched-and-tempered carbon steel and high-strength low-alloy steel plates of structural quality for welded, riveted, or bolted construction. The plates shall undergo heat treatment by heating to a temperature that produces an austenitic structure. Heat and product analyses shall be performed on the material and shall conform to the required amount of chemical composition in carbon, manganese, phosphorus, sulfur, silicon, vanadium, columbium, nitrogen, and copper. The plates shall withstand tension test and applicable grade shall conform to the specified mechanical properties such as yield strength, tensile strength, and elongation.
SCOPE
1.1 This specification covers quenched-and-tempered carbon steel and high-strength low-alloy steel plates of structural quality for welded, riveted, or bolted construction.
1.2 If the steel is to be welded, it is presupposed that a welding procedure suitable for the grade of steel and intended use or service will be used.
1.3 Plates under this specification are available in four grades as follows:GradeYieldStrength,min, ksi[MPa]Tensile Strength,ksi [MPa] MaximumThickness, in. [mm]A 50 [345]70-90 [485-620]11/2 [40]B 60 [415]80-100 [550-690]21/2 [65]C   2 [50]D 75 [515]90-110 [620-760]3 [75] Varies with thickness. See .
1.4 The values stated in either inch-pound units or SI units are to be regarded separately as standard. Within the text, the SI units are shown in brackets. The values stated in each system are not exact equivalents; therefore, each system is to be used independently of the other.

General Information

• Status: Historical
• Publication Date: 31-Aug-2005
• ICS: 77.140.50 - Flat steel products and semi-products
• Technical Committee: A01 - Steel, Stainless Steel and Related Alloys
• Drafting Committee: A01.02 - Structural Steel for Bridges, Buildings, Rolling Stock and Ships

Relations

• Replaces: ASTM A678/A678M-00a - Standard Specification for Quenched-and-Tempered Carbon and High-Strength Low-Alloy Structural Steel Plates
• Effective Date: 01-Sep-2005
• Replaced By: ASTM A678/A678M-05(2009) - Standard Specification for Quenched-and-Tempered Carbon and High-Strength Low-Alloy Structural Steel Plates (Withdrawn 2010)
• Effective Date: 01-Oct-2009

Standards Content (Sample)

NOTICE: This standard has either been superseded and replaced by a new version or withdrawn.
Contact ASTM International (www.astm.org) for the latest information.
Designation: A678/A678M – 05
Standard Specification for
Quenched-and-Tempered Carbon and High-Strength Low-
1
Alloy Structural Steel Plates
This standard is issued under the fixed designationA678/A678M; the number immediately following the designation indicates the year
of original adoption or, in the case of revision, the year of last revision. A number in parentheses indicates the year of last reapproval.
A superscript epsilon (´) indicates an editorial change since the last revision or reapproval.
1. Scope* 3. General Requirements for Delivery
1.1 This specification covers quenched-and-tempered car- 3.1 Plates furnished under this specification shall conform
bon steel and high-strength low-alloy steel plates of structural to the applicable requirements of the current edition of Speci-
quality for welded, riveted, or bolted construction. fication A6/A6M unless a conflict exists, in which case this
1.2 If the steel is to be welded, it is presupposed that a specification shall prevail.
welding procedure suitable for the grade of steel and intended
4. Materials and Manufacture
use or service will be used.
1.3 Plates under this specification are available in four 4.1 The requirements for fine austenitic grain size in Speci-
fication A6/A6M shall be met.
grades as follows:
Yield
Maximum
5. Heat Treatment
Strength, Tensile Strength,
Grade Thickness,
min, ksi ksi [MPa]
in. [mm] 5.1 The plates shall be heat treated by heating to a tempera-
[MPa]
ture that produces an austenitic structure, but not exceeding
1
A 50 [345] 70–90 [485–620] 1 ⁄2 [40]
1700°F [925°C], holding a sufficient time to attain uniform
1
B 60 [415] 80–100 [550–690] 2 ⁄2 [65]
heat throughout the material, quenching in a suitable medium,
AA
C 2 [50]
and tempering at not less than 1100°F [593°C]. The heat-
D 75 [515] 90–110 [620–760] 3 [75]
A
treatment temperatures shall be reported in the test report.
Varies with thickness. See Table 1.
1.4 The values stated in either inch-pound units or SI units
6. Chemical Composition
are to be regarded separately as standard. Within the text, the
6.1 The heat analysis shall conform to the requirements
SI units are shown in brackets. The values stated in each
given in Table 2 for the applicable grade.
system are not exact equivalents; therefore, each system is to
6.2 The product analysis shall conform to the requirements
be used independently of the other.
given in Table 2, subject to the product analysis tolerances in
2. Referenced Documents
Specification A6/A6M.
2
2.1 ASTM Standards:
7. Tension Test
A6/A6M Specification for General Requirements for Rolled
7.1 The plates as represented by the test specimens shall
Structural Steel Bars, Plates, Shapes, and Sheet Piling
conform to the requirements given in Table 1 specified for the
A370 Test Methods and Definitions for Mechanical Testing
applicable grade.
of Steel Products
7.2 Number of Tests—One tension test shall be taken from
a corner of each plate as heat treated.
1
This specification is under the jurisdiction of ASTM Committee A01 on Steel,
Stainless Steel and Related Alloys and is the direct responsibility of Subcommittee
8. Keywords
A01.02 on Structural Steel for Bridges, Buildings, Rolling Stock and Ships.
Current edition approved Sept. 1, 2005. Published October 2005. Originally 8.1 carbon; bolted construction; high-strength; low-alloy;
approved in 1973. Last previous edition approved in 2000 as A678/A678M – 00a.
plates; quenched; steel; structural steel; tempered; welded
DOI: 10.1520/A0678_A0678M-05.
construction
2
For referenced ASTM standards, visit the ASTM website, www.astm.org, or
contact ASTM Customer Service at [e-mail]. For Annual Book of ASTM
Standards volume information, refer to the standard’s Document Summary page on
the ASTM website.
*ASummary of Changes section appears at the end of this standard.
Copyright © ASTM International, 100 Barr Harbor Drive, PO Box C700, West Conshohocken, PA 19428-2959, United States.
1

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A678/A678M – 05
A
TABLE 1 Mechanical Requirements
Grade A Grade B Grade C Grade D
B
Yield strength , min. ksi [MPa]
3
To ⁄4 in. [20 mm], incl 50 [345] 60 [415] 75 [515] 75 [515]
3 1
Over ⁄4 to 1 ⁄2 in. [20 to 40 mm], incl 50 [345] 60 [415] 70 [485] 75 [515]
C
1
Over 1 ⁄2 to2in. [40to50mm],incl 60 [415] 65 [450] 75 [515]
1 C C
Over 2 to 2 ⁄2 in. [50 to 65 mm], incl 60 [415] 75 [515]
CC C
1
Over 2 ⁄2 to3in. [65to75mm],incl 75 [515]
Tensile strength, ksi [MPa]
3
To ⁄4 in. [20 mm], incl 70–90 [485–620] 80–100 [550–690] 95–115 [655–790] 90–110 [620–760]
3 1
Over ⁄4 to 1 ⁄2 in. [20 to 40 mm], incl 70–90 [485–620] 80–100 [550–690] 90–110 [620–760] 90–110 [620–760]
C
1
Over 1 ⁄2 to2in. [40to50mm],incl 80–100 [550–690] 85–105 [585–720] 90–110 [620–760]
C C
1
Over 2 to 2 ⁄2 in. [50 to 65 mm], incl 80–100 [550–690] 90–110 [620–76
...

This document is not an ASTM standard and is intended only to provide the user of an ASTM standard an indication of what changes have been made to the previous version. Because
it may not be technically possible to adequately depict all changes accurately, ASTM recommends that users consult prior editions as appropriate. In all cases only the current version
of the standard as published by ASTM is to be considered the official document.
Designation:A 678/A 678M–00a Designation: A 678/A 678M – 05
Standard Specification for
Quenched-and-Tempered Carbon and High-Strength Low-
1
Alloy Structural Steel Plates
This standard is issued under the fixed designationA678/A678M; the number immediately following the designation indicates the year
of original adoption or, in the case of revision, the year of last revision. A number in parentheses indicates the year of last reapproval.
A superscript epsilon (´) indicates an editorial change since the last revision or reapproval.
1. Scope*
1.1 This specification covers quenched-and-tempered carbon steel and high-strength low-alloy steel plates of structural quality
for welded, riveted, or bolted construction.
1.2When1.2 If the steel is to be welded, it is presupposed that a welding procedure suitable for the grade of steel and intended
use or service will be used.
1.3Material1.3 Plates under this specification isare available in four grades as follows:
Yield
Maximum
Strength, Tensile Strength,
Grade Thickness,
min, ksi ksi [MPa]
in. [mm]
[MPa]
1
A 50 [345] 70–90 [485–620] 1 ⁄2 [40]
1
B 60 [415] 80–100 [550–690] 2 ⁄2 [65]
AA
C 2 [50]
D 75 [515] 90–110 [620–760] 3 [75]
A
Varies with thickness. See Table 1.
1.4 The values stated in either inch-pound units or SI units are to be regarded separately as standard.Within the text, the SI units
are shown in brackets. The values stated in each system are not exact equivalents. T; therefore, each system must is to be used
independently of the other. Combining values from the two systems may result in nonconformance with this specification.
2. Referenced Documents
2
2.1 ASTM Standards:
A 6/A 6M Specification for General Requirements for Rolled Structural Steel Bars, Plates, Shapes, and Sheet Piling
A 370 Test Methods and Definitions for Mechanical Testing of Steel Products
E112Test Methods for Determining the Average Grain Size Test Methods and Definitions for Mechanical Testing of Steel
Products
3. General Requirements for Delivery—
3.1 Plates furnished under this specification shall conform to the applicable requirements of the current edition of Specification
A 6/A 6M unless a conflict exists, in which case this specification shall prevail.
4. Materials and Manufacture
3.1The4.1 The requirements for fine austenitic grain size in Specification A 6/A 6Mshall be met.
4.Heat Treatment
4.1The material shall be treated by the manufacturer by heating to a temperature that produces an austenitic structure, but not
exceeding 1700°F [925°C], holding a sufficient time to attain uniform heat throughout the material, quenching in a suitable
medium, and tempering at not less than 1100°F [593°C]. Heat-treating temperatures shall be reported on the mill certificates.
5. Heat Treatment
5.1 The plates shall be heat treated by heating to a temperature that produces an austenitic structure, but not exceeding 1700°F
1
This specification is under the jurisdiction ofASTM CommitteeA01 on Steel, Stainless Steel, and RelatedAlloys and is the direct responsibility of SubcommitteeA01.02
on Structural Steel for Bridges, Buildings, Rolling Stock, and Ships.
Current edition approved Sept. 10, 2000. Published October 2000. Originally published as A678–73. Last previous edition A678/A678M–00.
Current edition approved Sept. 1, 2005. Published October 2005. Originally approved in 1973. Last previous edition approved in 2000 as A 678/A 678M – 00a.
2
For referencedASTM standards, visit theASTM website, www.astm.org, or contactASTM Customer Service at [e-mail]. For Annual Book of ASTM Standards
, Vol 01.04.volume information, refer to the standard’s Document Summary page on the ASTM website.
*ASummary of Changes section appears at the end of this standard.
Copyright © ASTM International, 100 Barr Harbor Drive, PO Box C700, West Conshohocken, PA 19428-2959, United States.
1

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A 678/A 678M – 05
A
TABLE 1 Mechanical Requirements
Grade A Grade B Grade C Grade D
B
Yield strength , min. ksi [MPa]
3
To ⁄4 in. [20 mm], incl 50 [345] 60 [415] 75 [515] 75 [515]
3 1
Over ⁄4 to 1 ⁄2 in. [20 to 40 mm], incl 50 [345] 60 [415] 70 [485] 75 [515]
C
1
Over 1 ⁄2 to2in. [40to50mm],incl 60 [415] 65 [450] 75 [515]
1 C C
Over 2 to 2 ⁄2 in. [50 to 65 mm], incl 60 [415] 75 [515]
CC C
1
Over 2 ⁄2 to3in. [65to75mm],incl 75 [515]
Tensile strength, ksi [MPa]
3
To ⁄4 in. [20 mm], incl 70–90 [485–620] 80–100 [550–690] 95–115 [655–790] 90–110 [620–760]
3 1
Over ⁄4 to 1 ⁄2 in. [20 to 40 mm], incl 70–90 [485–620] 80–100 [550–690] 90–110 [620–760] 90–110 [6
...