ASTM A572/A572M-12a

    Standard Specification for High-Strength Low-Alloy Columbium-Vanadium Structural Steel


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    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 Specification A588/A588M shall not be substituted for Specification A572/A572M without agreement between the purchaser and the supplier.

    1.4 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.)

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

    TABLE 1 Maximum Product Thickness or Size

    Grade

    Yield Point, min

    Maximum Thickness or Size

    Zees and Rolled
    Tees

    ksi

    [MPa]

    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 A36/A36M and 100 ksi [690 MPa], min, yield strength steels covered by Specification A514/A514M.
    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.

    1.6 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 A6/A6M for information on weldability.

    TABLE 2 Chemical RequirementsA (Heat Analysis)

    Diameter, Thickness,
    or Distance
    Between Parallel
    Faces, in. [mm]
    Plates and Bars

    Structural Shape
    Flange or Leg
    Thickness, in. [mm]

    Grade

    Carbon,
    max, %

    Manganese,B
    max, %

    Phosphorus,
    max, %

    Sulfur,
    max,
    %

    Silicon

    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 Thickness
    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 shown in Table 2.

    1.7 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.

    TABLE 3 Alloy Content


    TypeA

    Elements

    Heat Analysis, % 

    1

    Columbium

    0.005–0.05B

    2

    Vanadium

    0.01–0.15

    3

    Columbium
    Vanadium
    Columbium plus vanadium

    0.005-0.05B
    0.01–0.15
    0.02–0.15C

    5

    Titanium
    Nitrogen
    Vanadium

    0.006-0.04
    0.003–0.015
    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 Product analysis limits = 0.004 to 0.06 %.
    C Product analysis limits = 0.01 to 0.16 %.

    1.8 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.

    TABLE 4 Tensile RequirementsA

    Grade

    Yield Point, min

    Tensile Strength, min

    Minimum Elonga-
    tion, % 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 A6/A6M.
    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 A6/A6M.

    1.9 For structural products produced from coil and furnished without heat treatment or with stress relieving only, the additional requirements, including additional testing requirements and the reporting of additional tests, of A6/A6M apply.


    2. Referenced Documents (purchase separately) The documents listed below are referenced within the subject standard but are not provided as part of the standard.

    ASTM Standards

    A6/A6M Specification for General Requirements for Rolled Structural Steel Bars, Plates, Shapes, and Sheet Piling

    A36/A36M Specification for Carbon Structural Steel

    A514/A514M Specification for High-Yield-Strength, Quenched and Tempered Alloy Steel Plate, Suitable for Welding

    A588/A588M Specification for High-Strength Low-Alloy Structural Steel, up to 50 ksi [345 MPa] Minimum Yield Point, with Atmospheric Corrosion Resistance


    ICS Code

    ICS Number Code 77.140.10 (Heat-treatable steels)

    UNSPSC Code

    UNSPSC Code 30260000(Structural materials)


    Referencing This Standard

    DOI: 10.1520/A0572_A0572M-12A

    ASTM International is a member of CrossRef.


    Citation Format

    ASTM A572 / A572M-12a, Standard Specification for High-Strength Low-Alloy Columbium-Vanadium Structural Steel, ASTM International, West Conshohocken, PA, 2012, www.astm.org

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