A572

Kloeckner Metals routinely supplies A572, a high-strength, low-alloy structural steel plate, nationwide to its customers.

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General Info About A572

A572 plate is a high-strength, low-alloy structural steel that includes five grades—42, 50, 55, 60, and 65—according to their minimum specified yield strength. For applications requiring notch toughness, Kloeckner Metals also supplies A572 charpy tested.

  • Advantages/Disadvantages

    A572 steel plate has good structural quality with an optimal combination of high strength, high notch toughness, good weldability, and high value. Due to its alloying elements, it can be a little more difficult to form and pre-testing of both welding and post-welding heat treatments is recommended.

  • Industries

    As a structural steel plate, ASTM A572 grades are common in structural applications across a broad range of market segments.

  • Applications

    A572 is often used in construction equipment, bridges, buildings, machinery, freight cars, truck parts, and transmission towers. Because of its versatility, it is considered a “workhorse” grade and shows up in a huge range of products.

  • Machining

    A572 is an HSLA steel plate with fair machinability. It can be drilled, countersinked, counterbored, tapped, and milled with conventional equipment and carbide tools.

  • Welding

    A572 steel plate is considered to have excellent weldability and can be weld by all conventional methods.

  • Heat Treatment

    Heat treatment is not required for A572 steel plate. However, it is possible to require a higher level of strength by specifying quenched and tempered steel plates.

Typical Standards

GradeTypeRoutinely Supplied Dimensions (Imperial)
ThicknessWidthLength
42Discrete (Mill Rolled)4.5"+72", 84", 96", 120"Variable
50Discrete (Mill Rolled)3/16" - <4.5"72", 84", 96", 120"120", 240", 480"
50CVDiscrete (Mill Rolled)3/16" - <4.5"72", 84", 96", 120"120", 240", 480"
50Hot Rolled (Strip Mill)3/16" - 1/2"48", 60", 72"Any
50Cut to Length3/16" - 1/2"84", 96"Any
50Coil3/16" - 1/2"48" - 96"Any
55Discrete (Mill Rolled)3/16" - <4.5"72", 84", 96", 120"240" - 480"
55Hot Rolled (Strip Mill)3/16" - 1/2"48", 60", 72"Any
55Cut to Length3/16" - 1/2"84", 96"Any
55Coil3/16" - 1/2"84", 96"Any
60Discrete (Mill Rolled)3/16" - <4.5"72", 84", 96", 120"240" - 480"
60Hot Rolled (Strip Mill)3/16" - 1/2"48", 60", 72"Any
60Cut to Length3/16" - 1/2"84", 96"Any
60Coil3/16" - 1/2"48" - 96"Any
65Discrete (Mill Rolled)3/16" - 2"72", 84", 96", 120"240" - 480"
65Hot Rolled (Strip Mill)3/16" - 1/2"48", 60", 72"Any
65Cut to Length3/16" - 1/2"84", 96"Any
65Coil3/16" - 1/2"48" - 96"Any

Chemical Properties (Grade 42)

CMnPSSi
0.21%1.35%0.030%0.030%0.15-0.40%

Chemical Properties (Grade 50)

CMnPSSi
0.23%1.35%0.030%0.030%0.15-0.40%

Chemical Properties (Grade 55)

CMnPSSi
0.25%1.35%0.030%0.030%0.15-0.40%

Chemical Properties (Grade 60)

CMnPSSi
0.26%1.35%0.030%0.030%0.40%

Chemical Properties (Grade 65)

CMnPSSi
0.26%1.35%0.030%0.030%0.40%

Mechanical Properties

Mechanical Properties
MetricImperial
Tensile Strength, Ultimate400 - 550 MPa58,000 - 79,800 PSI
Tensile Strength, Yield250 MPa36,300 PSI
Elongation at Break (in 200 mm)20.0%20.0%
Elongation at Break (in 50 mm)23.0%23 .0%
Modulus of Elasticity200 GPa29,000 KSI
Bulk Modulus (typical for steel)140 GPa20,300 KSI
Poissons Ratio0.2600.260
Shear Modulus79.3 GPa11,500 KSI

Frequently Asked Questions

  • What is the tensile strength of ASTM A572 Grade 50 steel?

    ANSWER:

    ASTM 572 Grade 50 steel has an ultimate tensile strength of 450 MPa (metric) and 65,300 PSI (Imperial). It has a tensile yield strength of 345 MPa and 50,000 PSI.

  • What are ASTM A572 GR 50 steel Properties?

    ANSWER:

    Mechanical PropertiesMetricEnglish
    Hardness, Brinell135135
    Hardness, Rockwell B7474
    Tensile Strength, Ultimate450 MPa65300 psi
    Tensile Strength, Yield345 MPa50000 psi
    Elongation at Break  (in 200 mm)18%18%
    Elongation at Break (in 50 mm)21%21%
    Bulk Modulus160 GPa23200 ksi
    Shear Modulus80.0 GPa11600 ksi

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