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Designation: A 572/A 572M – 06
Standard Specification for
High-Strength Low-Alloy Columbium-Vanadium Structural
This standard is issued under the fixed designation A 572/A 572M; 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.
This standard has been approved for use by agencies of the Department of Defense.
1. Scope*
1.1 This specification covers five grades of high-strength low-alloy structural steel shapes, plates, sheet piling, and bars.
Grades 42 [290], 50 [345], and 55 [380] are intended for riveted, bolted, or welded structures. Grades 60 [415] and 65 [450] are intended for riveted or bolted construction of bridges, or for riveted, bolted, or welded construction in other applications.

1.2 For applications, such as welded bridge construction, where notch toughness is important, notch toughness requirements are to be negotiated between the purchaser and the producer.

1.3 The use of columbium, vanadium, titanium, nitrogen, or combinations thereof, within the limitations noted in Section 5, is required; the selection of type (1, 2, 3, or 5) is at the option of the producer, unless otherwise specified by the purchaser. (See Supplementary Requirement S90.)

1.4 The maximum thicknesses available in the grades and products covered by this specification are shown in Table 1.

1.5 When the steel is to be welded, a welding procedure suitable for the grade of steel and intended use or service is to be utilized. See Appendix X3 of Specification A 6/A 6M for information on weldability.

1.6 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, without combining values in any way.

1.7 The text of this specification contains notes or footnotes, or both, that provide explanatory material. Such notes and footnotes, excluding those in tables and figures, do not contain any mandatory requirements.

1.8 For structural products produced from coil and furnished without heat treatment or with stress relieving only, theadditional requirements, including additional testing requirements and the reporting of additional tests, of A 6/A 6M apply.

2. Referenced Documents
2.1 ASTM Standards: 2
A 6/A 6M Specification for General Requirements for Rolled Structural Steel Bars, Plates, Shapes, and Sheet
Piling A 36/A 36M Specification for Carbon Structural Steel A 514/A 514M Specification for High-Yield-Strength, Quenched and Tempered Alloy Steel Plate, Suitable for Welding

3. General Requirements for Delivery
3.1 Structural products furnished under this specification shall conform to the requirements of the current edition of Specification A 6/A 6M, for the specific structural product ordered, unless a conflict exists in which case this specification shall prevail.

3.2 Coils are excluded from qualification to this specification until they are processed into a finished structural product. Structural products produced from coil means structural products that have been cut to individual lengths from a coil. The processor directly controls, or is responsible for, the operations involved in the processing of a coil into a finished structural product. Such operations include decoiling, leveling or
straightening, hot-forming or cold-forming (if applicable), cutting to length, testing, inspection, conditioning, heat treatment (if applicable), packaging, marking, loading for shipment, and certification. NOTE 1—For structural products produced from coil and furnished  without heat treatment or with stress relieving only, two test results are to be reported for each qualifying coil. Additional requirements regarding structural products produced from coil are described in A 6/A 6M.

TABLE 1 Maximum Product Thickness or Size
Yield Point, min Maximum Thickness or Size
Zees and Rolled
ksi [MPa] Tees
Plates and Bars
Structural Shape
Flange or Leg
Thickness Sheet Piling
in. [mm] in. [mm]
42 [290]A 42 [290] 6 [150] all all all all
50 [345]A 50 [345] 4B [100]B all all all all
55 [380] 55 [380] 2 [50] all all all all
60 [415]A 60 [415] 11⁄4
C [32]C 2 [50] all all
65 [450] 65 [450] 11⁄4 [32] 2 [50] not available all
A In the above tabulation, Grades 42, 50, and 60 [290, 345, and 415], are the yield point levels most closely approximating a geometric progression pattern between 36 ksi [250 MPa], min, yield point steels covered by Specification A 36/A 36M and 100 ksi [690 MPa], min, yield strength steels covered by Specification A 514/A 514M. B Round bars up to and including 11 in. [275 mm] in diameter are permitted.
C Round bars up to and including 31⁄2 in. [90 mm] in diameter are permitted.
TABLE 2 Chemical RequirementsA
(Heat Analysis)
Diameter, Thickness,
or Distance
Between Parallel
Faces, in. [mm]
Plates and Bars
Flange or
in. [mm]
max, %
max, %
max, %
Plates to 11⁄2 in. [40
mm] Thick,
Shapes with
Flange or Leg
Thickness to 3 in.
[75 mm] inclusive,
Sheet Piling,
Bars, Zees, and
Rolled TeesC
Plates Over 11⁄2 in.
[40 mm] Thick and
Shapes with Flange
Over 3 in.
[75 mm]
max, % range, %
6 [150] all 42 [290] 0.21 1.35D 0.04 0.05 0.40 0.15–0.40
4 [100]E all 50 [345] 0.23 1.35D 0.04 0.05 0.40 0.15–0.40
2 [50]F all 55 [380] 0.25 1.35D 0.04 0.05 0.40 0.15-0.40
11⁄4 [32]F #2 [50] 60 [415] 0.26 1.35D 0.04 0.05 0.40 G
>1⁄2 – 11⁄4 [13–32] >1-2 [25-50] 65 [450] 0.23 1.65 0.04 0.05 0.40 G
#1⁄2 [13]H # 1H 65 [450] 0.26 1.35 0.04 0.05 0.40 G

A Copper when specified shall have a minimum content of 0.20 % by heat analysis (0.18 % by product analysis).
B Manganese, minimum, by heat analysis of 0.80 % (0.75 % by product analysis) shall be required for all plates over 3⁄8 in. [10 mm] in thickness; a minimum of 0.50 %
(0.45 % by product analysis) shall be required for plates 3⁄8 in. [10 mm] and less in thickness, and for all other products. The manganese to carbon ratio shall not be less
than 2 to 1.
C Bars over 11⁄2 in. [40 mm] in diameter, thickness, or distance between parallel faces shall be made by a killed steel practice.
D For each reduction of 0.01 percentage point below the specified carbon maximum, an increase of 0.06 percentage point manganese above the specified maximum
is permitted, up to a maximum of 1.60 %.
E Round bars up to and including 11 in. [275 mm] in diameter are permitted.
F Round bars up to and including 31⁄2 in. [90 mm] in diameter are permitted. G The size and grade is not described in this specification.
H An alternative chemical requirement with a maximum carbon of 0.21 % and a maximum manganese of 1.65 % is permitted, with the balance of the elements as shownin Table 2.
4. Materials and Manufacture
4.1 The steel shall be semi-killed or killed
5. Chemical Composition
5.1 The heat analysis shall conform to the requirements
prescribed in Table 2 and Table 3.
5.2 The steel shall conform on product analysis to the
requirements prescribed in Table 2 and Table 3, subject to the
product analysis tolerances in Specification A 6/A 6M.
6. Mechanical Properties
6.1 Tensile Properties:
6.1.1 The material as represented by the test specimens shall
conform to the tensile properties given in Table 4.
7. Keywords
7.1 bars; bolted construction; bridges; buildings;
columbium-vanadium; high-strength; low-alloy; plates; riveted
construction; shapes; sheet piling; steel; structural steel;
welded construction

TABLE 3 Alloy Content
TypeA Elements
Analysis, %
1 ColumbiumB 0.005–0.05C
2 Vanadium 0.01–0.15
3 ColumbiumB
Columbium plus vanadium
5 Titanium
0.06 max
A Alloy content shall be in accordance with Type 1, 2, 3, or 5 and the contents of the applicable elements shall be reported on the test report.
B Columbium shall be restricted to the following thicknesses and sizes unless killed steel is furnished. Killed steel shall be confirmed by a statement of killed steel on the test report, or by a report on the presence of a sufficient quantity of a strong deoxidizing element, such as silicon at 0.10 % or higher, or aluminum at 0.015 % or higher. See table below.
C Product analysis limits = 0.004 to 0.06 %.
D Product analysis limits = 0.01 to 0.16 %.
Maximum Plate, Bar,
Piling, Zees, and Rolled
Tee Thicknesses, in. [mm]
Maximum Structural
Shape Flange or Leg
in. [mm]
42, 50, and 55 3⁄4 1.5
[290, 345, and
[20] [40]
60 and 65 1⁄2 1
[415 and 450] [13] [25]
TABLE 4 Tensile RequirementsA
Yield Point, min Tensile Strength, min
Minimum Elongation,
% B,C,D
ksi [MPa] ksi [MPa]
in 8 in.
[200 mm]
in 2 in.
[50 mm]
42 [290] 42 [290] 60 [415] 20 24
50 [345] 50 [345] 65 [450] 18 21
55 [380] 55 [380] 70 [485] 17 20
60 [415] 60 [415] 75 [520] 16 18
65 [450] 65 [450] 80 [550] 15 17
A See specimen Orientation under the Tension Tests section of Specification
A 6/A 6M.
B Elongation not required to be determined for floor plate.
C For wide flange shapes over 426 lb/ft [634 kg/m], elongation in 2 in. [50 mm] of 19 % minimum applies. D For plates wider than 24 in. [600 mm], the elongation requirement is reduced two percentage points for Grades 42, 50, and 55 [290, 345, and 380], and three percentage points for Grades 60 and 65 [415 and 450]. See elongation requirement adjustments in the Tension Tests section of Specification A 6/A 6M.

A 572/A 572M – 06
Supplementary requirements shall not apply unless specified in the order or contract. Standardized supplementary requirements for use at the option of the purchaser are listed in SpecificationA6/A 6M.
Those that are considered suitable for use with this specification are listed by title:
S5. Charpy V-Notch Impact Test.
S18. Maximum Tensile Strength
S30. Charpy V-Notch Impact Test for Structural Shapes: Alternate Core Location
S32. Single Heat Bundles.
In addition, the following supplementary requirements are suitable for use:
S81. Tensile Strength
S81.1 For Grade 50 [345] steel of thicknesses 3⁄4 in. [20
mm] and less, the tensile strength shall be a minimum of 70 ksi
[485 MPa].
S90. Type
S90.1 The specific type of steel shall be as specified by the
purchaser in the order or contract.
Committee A01 has identified the location of selected changes to this standard since the last issue (A 572/A
572M – 04) that may impact the use of this standard.
(1) The maximum permitted manganese was changed from
1.50 % to 1.60 % for grades 42, 50, 55, and 60 in Table 2.
ASTM International takes no position respecting the validity of any patent rights asserted in connection with any item mentioned
in this standard. Users of this standard are expressly advised that determination of the validity of any such patent rights, and the risk
of infringement of such rights, are entirely their own responsibility.
This standard is subject to revision at any time by the responsible technical committee and must be reviewed every five years and
if not revised, either reapproved or withdrawn. Your comments are invited either for revision of this standard or for additional standards
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High Strength Low Alloy Steel Plates

C SA G40.21 Grade 44W, 50W, 50A
A ASHTO M270 Grade 50, 50W


Alloy Quenched & Tempered Steel Plate

A514 Grade B, E, F, H, Q, S
130 ksi/890 MPa Yield Strength
140 ksi/960 MPa Yield Strength
TMCP 100 ksi/690 MPa
ASTM A829-4140


Abrasion Resistant Steel Plate
A R Medium : AR200/AR235
A R 400/400F
A R 450/450F
A R 500/500F
A R 600


Pressure Vessel Steel Plate

A516 Grade 55, 60, 65, 70
TC 128


Offshore & Marine Steel Plant

ABS Grade A, B, AH36, DH36, EH36
API 2H Grade 50


Armor & Ballistic Steel Plate

MIL A 46100
MIL A 12560
MIL A 46177
Low/High Carbon Non-Structural Steel Plate
A 830-1045


Caterpillar Spec Steel

EN Standard Steel Plate

S235 S420
S275 S690
S355 S890


Offshore & Structural Plate

Boiler, Pressure Vessel & Chrome Moly


Pressure Vessel Steel

ASME SA516/ASTM 516-Gr70
EN 10028:3 P355 NL1 & P355 NL2
BS 1501 224 490B LT50
BS 1501 223 490B LT30
BS 1501 225 490B LT50
EN 10028:3 P355NH
ASME SA537/ASTM A537-Class 1
ASME SA516/ASTM A516-Gr-65
ASME SA516/ASTM A516-Gr-60
EN 10028:3 P460NL1
EN 10028:3 P460NL2
EN 10028:3 P460NH


Boiler Plate Steel

ASME SA516/ASTM A516 Gr 60

EN 10028:3 P275NH
BS 1501 161 430 A/B
EN 10028:2 P265 GH
EN 10207 P2655


HIC Steel Plate

CarElso HIC Premium+


Quenched & Tempered

EN 10025 S690QC
RQT 701
EN 10025 S 890QC


Abrasion Resistant Steel
Abrazo 400


High Yield Steel Plate

460 Yield Steel Plate

EN 10028:3 P460NL1
EN 10028:3 P460NL2
EN 10028:3 P460NH
EN 10025:3 S460N
EN 10025:3 S460NL


Armour Plate

Chrome Moly Plate

ASME SA 387 & ASTM A387

SA 387 / A387 Gr 11
SA 387 / A387 Gr 12
SA 387 / A387 Gr 22


Offshore & Structural Steel Plate