ASTM A678/A678M-00a

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

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 When 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 Material under this specification is available in four grades as follows:GradeYieldStrength,min, ksi[MPa]Tensile Strength,ksi [MPa] Maximum Thickness, in. [mm]A 50 [345]70-90 [485-620]11/2 [40]B 60 [415]80-100 [550-690]21/2 [65]CA A 2 [50]D 75 [515]90-110 [620-760]3 [75] AVaries with thickness. See Table 1.
1.4 The values stated in either inch-pound units or SI units are to be regarded 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 must be used independently of the other. Combining values from the two systems may result in nonconformance with this specification.

General Information

• Status: Historical
• Publication Date: 09-Sep-2000
• 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

• Replaced By: ASTM A678/A678M-05 - Standard Specification for Quenched-and-Tempered Carbon and High-Strength Low-Alloy Structural Steel Plates
• Effective Date: 01-Sep-2005

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NOTICE: This standard has either been superseded and replaced by a new version or withdrawn.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: A 678/A 678M – 00a
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 (e) indicates an editorial change since the last revision or reapproval.
1. Scope 3. Materials and Manufacture
1.1 This specification covers quenched-and-tempered car- 3.1 The requirements for fine austenitic grain size in Speci-
bon steel and high-strength low-alloy steel plates of structural fication A 6/A 6M shall be met.
quality for welded, riveted, or bolted construction.
4. Heat Treatment
1.2 When the steel is to be welded, it is presupposed that a
welding procedure suitable for the grade of steel and intended 4.1 The material shall be treated by the manufacturer by
heating to a temperature that produces an austenitic structure,
use or service will be used.
1.3 Material under this specification is available in four but not exceeding 1700°F [925°C], holding a sufficient time to
attain uniform heat throughout the material, quenching in a
grades as follows:
suitable medium, and tempering at not less than 1100°F
Yield
Maximum
Strength, Tensile Strength,
[593°C]. Heat-treating temperatures shall be reported on the
Grade Thickness,
min, ksi ksi [MPa]
in. [mm]
mill certificates.
[MPa]
1 5. Chemical Composition
A 50 [345] 70–90 [485–620] 1 ⁄2 [40]
1
B 60 [415] 80–100 [550–690] 2 ⁄2 [65]
5.1 The heat analysis shall conform to the chemical com-
AA
C 2 [50]
position requirements for the applicable grade as listed inTable
D 75 [515] 90–110 [620–760] 3 [75]
A
2.
Varies with thickness. See Table 1.
5.2 The steel shall conform on product analysis to the
1.4 The values stated in either inch-pound units or SI units
are to be regarded as standard. Within the text, the SI units are requirements prescribed in Table 2, subject to the product
analysis tolerances in Specification A 6/A 6M.
shown in brackets. The values stated in each system are not
exact equivalents. Therefore, each system must be used inde-
6. Tension Test
pendentlyoftheother.Combiningvaluesfromthetwosystems
6.1 The material as represented by the test specimens shall
may result in nonconformance with this specification.
conform to the requirements specified for the applicable grade
2. Referenced Documents
in Table 1.
6.2 Number of Tests—One tension test shall be taken from
2.1 ASTM Standards:
A 6/A 6M Specification for General Requirements for a corner of each plate as heat treated. Plates wider than 24 in.
[600 mm] shall be tested in the transverse direction and are
Rolled Structural Steel Bars, Plates, Shapes, and Sheet
2
Piling subject to the modifications for elongation contained in Foot-
note D of Table 1.
A 370 Test Methods and Definitions for MechanicalTesting
3
of Steel Products
7. General Requirements for Delivery
E 112 Test Methods for Determining the Average Grain
4
7.1 Material furnished under this specification shall con-
Size
form to the requirements of the current edition of Specification
A 6/A 6M, for the ordered material, unless a conflict exists in
1
This specification is under the jurisdiction of ASTM Committee A01 on Steel,
which case this specification shall prevail.
Stainless Steel, and RelatedAlloys and is the direct responsibility of Subcommittee
A01.02 on Structural Steel for Bridges, Buildings, Rolling Stock, and Ships.
8. Keywords
Current edition approved Sept. 10, 2000. Published October 2000. Originally
published as A 678 – 73. Last previous edition A 678/A 678M – 00.
8.1 carbon; bolted construction; high-strength; low-alloy;
2
Annual Book of ASTM Standards, Vol 01.04.
plates; quenched; riveted construction; steel; structural steel;
3
Annual Book of ASTM Standards, Vol 01.03.
tempered; welded construction
4
Annual Book of ASTM Standards, Vol 03.01.
Copyright © ASTM International, 100 Barr Harbor Drive, PO Box C700, West Conshohocken, PA 19428-2959, United States.
1

---------------------- Page: 1 ----------------------
A 678/A 678M – 00a
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 [620–7
...