A572 Steel Plate

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

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Typical Standards

FormatGrade Sizes Routinely Stocked (Imperial)
Thickness WidthLength
Discrete (Mill Rolled)424.5"+72", 84", 96", 120"Variable
Discrete (Mill Rolled)503/16" - <4.5"72", 84", 96", 120"120", 240", 480"
Discrete (Mill Rolled)50CV3/16" - <4.5"72", 84", 96", 120"120", 240", 480"
Hot Rolled (Strip Mill) 503/16" - 1/2"48", 60", 72"Any
Cut to Length 503/16" - 1/2"84", 96"Any
Coil 503/16" - 1/2"48" - 96"Any
Discrete (Mill Rolled)553/16" - <4.5"72", 84", 96", 120"240" - 480"
Hot Rolled (Strip Mill) 553/16" - 1/2"48", 60", 72"Any
Cut to Length 553/16" - 1/2"84", 96"Any
Coil 553/16" - 1/2"84", 96"Any
Discrete (Mill Rolled)603/16" - <4.5"72", 84", 96", 120"240" - 480"
Hot Rolled (Strip Mill) 603/16" - 1/2"48", 60", 72"Any
Cut to Length 603/16" - 1/2"84", 96"Any
Coil 603/16" - 1/2"48" - 96"Any
Discrete (Mill Rolled)653/16" - 2"72", 84", 96", 120"240" - 480"
Hot Rolled (Strip Mill) 653/16" - 1/2"48", 60", 72"Any
Cut to Length 653/16" - 1/2"84", 96"Any
Coil 653/16" - 1/2"48" - 96"Any

General Info About A572

A572 plate is a high-strength, low-alloy structural steel that includes five grades—42, 50, 55, 60, 65 and 80—according to their minimum specified yield strength. For applications requiring notch toughness, Kloeckner Metals also supplies it charpy tested.

More Details About A572

  • 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

    A572 grades 50, 65, and 80 are seen widely in the solar industry and the wind industry. 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 power transmission poles. Because of its versatility, it is considered a “workhorse” grade and shows up in a huge range of products. A572 grades 50, 65, and 80 steel plate are frequently used in the wind industry where they are often used as base plates for wind turbines and can be custom roll formed to size and welded into wind towers.

  • 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.

Chemical Properties (Grade 42)


Chemical Properties (Grade 50)


Chemical Properties (Grade 55)


Chemical Properties (Grade 60)


Chemical Properties (Grade 65)


Mechanical Properties

Mechanical Properties
Tensile Strength, Ultimate400 - 550 MPa58,000 - 79,800 PSI
Tensile Strength, Yield 250 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 Elasticity 200 GPa 29,000 KSI
Bulk Modulus (typical for steel) 140 GPa 20,300 KSI
Poissons Ratio 0.260 0.260
Shear Modulus 79.3 GPa 11,500 KSI

Frequently Asked Questions

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


    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?


    Mechanical Properties Metric English
    Hardness, Brinell 135 135
    Hardness, Rockwell B 74 74
    Tensile Strength, Ultimate 450 MPa 65300 psi
    Tensile Strength, Yield 345 MPa 50000 psi
    Elongation at Break  (in 200 mm) 18% 18%
    Elongation at Break (in 50 mm) 21% 21%
    Bulk Modulus 160 GPa 23200 ksi
    Shear Modulus 80.0 GPa 11600 ksi
  • What is S355?


    S355 steel is a European standard structural steel. A572 is its US standard equivalent.

  • What is the difference between plate mill rolled and plate strip mill A572?

    The terms “plate mill rolled” and “plate strip mill” refer to two different methods of manufacturing steel plates, including A572 steel. Here’s an explanation of the difference between the two:

    1. Plate Mill Rolled (PMR): Plate mill rolling is a process where the steel plates are manufactured directly from slabs of steel through a series of rolling operations. The slabs are heated and then passed through a series of rolling stands, which progressively reduce the thickness and shape the plates to the desired dimensions. This method is typically used for producing thick and heavy plates.
    2. Plate Strip Mill (PSM): Plate strip mill, also known as continuous mill rolling, is a process where steel plates are manufactured from coiled steel strip. The steel strip is unwound and passed through a series of rolling stands, which gradually reduce the thickness and increase the length of the strip until it reaches the desired plate thickness. The plates are then sheared to the required dimensions. This method is commonly used for producing thinner and lighter plates.

    In the context of A572 steel, both plate mill rolled and plate strip mill refer to the manufacturing process used to produce A572 steel plates. The choice of method depends on factors such as plate thickness, size, and desired properties. Generally, plate mill rolled A572 steel plates are suitable for thicker sections and heavier applications, while plate strip mill A572 steel plates are used for thinner sections and lighter applications. Both are available to customers for purchase on Kloeckner Direct.

Services provided to A572 Steel Plate products

Cut to Length

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Special Equipment servicing A572 Steel Plate

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Industries served by A572 Steel Plate


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Power Transmission Poles

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Refuse and Recycling Industry

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Military and Government

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Heavy Trucks

With locations across the United States offering...


Heavy Equipment & Construction

Between our long experience in heavy equipment...


Ship Building

Between our state-of-the-art manufacturing facilities and our...


Metal Building

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Fabricators & Machine Shops

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