ASTM A572 steel is a common high strength, low alloy (HSLA) structural steel used in the United States.[1] A572 steel properties are specified by ASTM International standards.[2]

Grades

A572 steel has five different grades: 42, 50, 55, 60 and 65.[2] Each of these grades differ in their mechanical properties and chemical composition.

Chemical Composition

A572 Steel Chemical Composition, Per ASTM standards [2]
A572 GradeCarbonManganesePhosphorusSulfurSilicon
Grade 420.21%1.35%0.030%0.030%0.15-0.40%
Grade 500.23%1.35%0.030%0.030%0.15-0.40%
Grade 550.25%1.35%0.030%0.030%0.15-0.40%
Grade 600.26%1.35%0.030%0.030%0.40%
Grade 65 Less Than 1/2" Thick0.26%1.35%0.030%0.030%0.40%
Grade 65 Over 1/2" to 1 1/4" Thick0.23%1.65%0.030%0.030%0.40%

Material Properties

A572 Steel Material Properties, Per ASTM Standards [2]
A572 GradeYield Point (KSI) [MPa]Tensile Strength (KSI) [MPa]Min. 8” Elongation %
Grade 4242 [290]60 [414]20
Grade 5050 [345]65 [448]18
Grade 5555 [379]70 [483]17
Grade 6060 [414]75 [517]16
Grade 6565 [448]80 [552]15

Forms

A572 steel is produced in a variety of different steel forms,[2] which include:

  • Plates [3]
  • Bars
  • Structural Shapes
  • Channels
  • I-Beams
  • Angles
  • Wide Flange Beams
  • Sheet Piling

Applications

A572 steel is typically used in structural applications due to its high strength, ductility, weldability and corrosion resistance.[4] These applications include structural sections, reinforcing bars, bridges, skyscrapers and houses.[1]

References

  1. 1 2 A. (2021). Steel Construction Manual (15th ed.). AMERICAN INSTITUTE OF PHYSICS / SPRINGER.
  2. 1 2 3 4 5 ASTM International. (2021). Standard Specification for High-Strength Low-Alloy Columbium-Vanadium Structural Steel. (Designation: A572/A572M – 21).
  3. Leeco Steel. (n.d.). A572 Steel Plate. Retrieved August 12, 2021, from https://www.leecosteel.com/a572-steel-plate/
  4. Bjorhovde, R. (2004). Development and use of high performance steel. Journal of Constructional Steel Research, 60(3–5), 393–400.
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