ASTM A945/A945M-05e1

Standard Specification for High-Strength Low-Alloy Structural Steel Plate with Low Carbon and Restricted Sulfur for Improved Weldability, Formability, and Toughness

SCOPE
1.1 This specification covers high-strength low-alloy structural steel plate intended for use in welded construction of naval ships where a savings in weight is important. Steels that conform to this specification offer improved weldability, formability, and toughness resulting from the specified alloying elements with limitations on carbon, sulfur, and residual element contents. Two grades, 50 and 65, may be provided as-rolled, control-rolled, thermo-mechanical control processed (including accelerated cooling), normalized, or quenched and tempered as required to meet the specified mechanical requirements.
1.2 The maximum thickness or weight [mass] of plates shall be as follows:Grade Plate thickness, max, in. [mm] Plate weight [mass], max, lb/ft2 [kg/m2] 50 2 [50] 81.7 [393] 65 11/4 [32]51.0 [251]  
1.3 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 utilized.
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 shall 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: 31-Aug-2005
• ICS: 47.020.05 - Materials and components for shipbuilding
• 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 A945/A945M-05 - Standard Specification for High-Strength Low-Alloy Structural Steel Plate with Low Carbon and Restricted Sulfur for Improved Weldability, Formability, and Toughness
• Effective Date: 01-Sep-2005
• Replaced By: ASTM A945/A945M-06 - Standard Specification for High-Strength Low-Alloy Structural Steel Plate with Low Carbon and Restricted Sulfur for Improved Weldability, Formability, and Toughness
• Effective Date: 01-Sep-2006
• Referred By: ASTM A1065/A1065M-18 - Standard Specification for Cold-Formed Electric-Fusion (Arc) Welded High-Strength Low–Alloy Structural Tubing in Shapes, with 50 ksi [345 MPa] Minimum Yield Point
• 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
e1
Designation: A 945/A 945M – 05
Standard Specification for
High-Strength Low-Alloy Structural Steel Plate with Low
Carbon and Restricted Sulfur for Improved Weldability,
1
Formability, and Toughness
ThisstandardisissuedunderthefixeddesignationA945/A945M;thenumberimmediatelyfollowingthedesignationindicatestheyear
of original adoption or, in the case of revision, the year of last revision.Anumber in parentheses indicates the year of last reapproval.
A superscript epsilon (e) indicates an editorial change since the last revision or reapproval.
1
e NOTE—Table 1 was corrected editorially in April 2006.
1. Scope* A 6/A6M Specification for General Requirements for
Rolled Structural Steel Bars, Plates, Shapes, and Sheet
1.1 This specification covers high-strength low-alloy struc-
Piling
tural steel plate intended for use in welded construction of
A370 TestMethodsandDefinitionsforMechanicalTesting
naval ships where a savings in weight [mass] is important.
of Steel Products
Plates that conform to this specification offer improved weld-
A673/A673M Specification for Sampling Procedure for
ability, formability, and toughness resulting from the specified
Impact Testing of Structural Steel
alloying elements with limitations on carbon, sulfur, and
A 700 Practices for Packaging, Marking, and Loading
residual element contents. Grades 50 and 65 may be provided
Methods for Steel Products for Domestic Shipment
as-rolled, control-rolled, thermo-mechanical control processed
E208 Test Method for Conducting Drop-Weight Test to
(including accelerated cooling), normalized, or quenched and
Determine Nil-Ductility Transition Temperature of Ferritic
tempered as required to meet the specified mechanical require-
Steels
ments.
1.2 Themaximumthicknessorweight[mass]ofplatesshall
3. General Requirements for Delivery
be as follows:
3.1 Plates furnished under this specification shall conform
Grade Plate thickness, Plate weight [mass],
2 2
to the applicable requirements of the current edition of Speci-
max, in. [mm] max, lb/ft [kg/m ]
50 2 [50] 81.7 [393]
fication A6/A6M.
1
65 2 ⁄2 [65] 102 [502]
3.2 If specified in the purchase order, plates ordered under
1.3 If the steel is to be welded, it is presupposed that a this specification shall be prepared for shipment in accordance
welding procedure suitable for the grade of steel and intended with the requirements of the current edition of Specification
use or service will be utilized. A700.
1.4 The values stated in either inch-pound units or SI units
4. Materials and Manufacture
aretoberegardedseparatelyasstandard.WithinthetexttheSI
units are shown in brackets. The values stated in each system 4.1 The steel shall be made to fine grain practice.
4.2 Grade 65 plates less than 1 in. [25 mm] in thickness
are not exact equivalents, therefore, each system is to be used
independently of the other without combining values in any shall be provided from continuously cast product.
4.3 Except as specified in 5.1 and 5.2, the plates after
way.
finish-rolling shall be in one of the following conditions:
2. Referenced Documents
as-rolled, control-rolled, or thermo-mechanical control pro-
2
2.1 ASTM Standards: cessed (including accelerated cooling).
5. Heat Treatment
1
This specification is under the jurisdiction ofASTM CommitteeA01 on Steel,
5.1 Grade 50 plates and Grade 65 plates are normally
Stainless Steel, and Related Alloys and is under the direct responsibility of
furnished without heat treatment. The manufacturer has the
SubcommitteeA01.02onStructuralSteelforBridges,Buildings,RollingStock,and
Ships. option to normalize or quench and temper such plates to meet
Current edition approved Sept. 1, 2005. Published October 2005. Originally
the mechanical requirements of Section 7 provided that the
approved in 1995. Last previous edition approved in 2000 as A 945/A945M–00.
heat treatment is reported on the test report.
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.
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A 945/A 945M – 05
1
TABLE 2 Tensile Requirements
5.2 Grade 65 plates greater than 1 ⁄4 in. [32 mm] in
thicknessshallbefurnishedinthequenchedandtemperedheat
B
Minimum Elongation, %
Yield Point or Yield
treatment.
Tensile Strength
A
Grade Strength
In8in. In2in.
ksi [MPa]
min, ksi [MPa]
[200 mm] [50 mm]
6. Chemical Composition
50 50 [345] 70 [485]–90 [620] 21 24
6.1 The heat analysis shall conform to the requirements
65 65 [450] 78 [540]–100 [690] 18 22
given in Table 1.
A
M
...