A572 steel

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 Grade	Carbon	Manganese	Phosphorus	Sulfur	Silicon
Grade 42	0.21%	1.35%	0.030%	0.030%	0.15-0.40%
Grade 50	0.23%	1.35%	0.030%	0.030%	0.15-0.40%
Grade 55	0.25%	1.35%	0.030%	0.030%	0.15-0.40%
Grade 60	0.26%	1.35%	0.030%	0.030%	0.40%
Grade 65 Less Than 1/2" Thick	0.26%	1.35%	0.030%	0.030%	0.40%
Grade 65 Over 1/2" to 1 1/4" Thick	0.23%	1.65%	0.030%	0.030%	0.40%

Material Properties

A572 Steel Material Properties, Per ASTM Standards ^[2]
A572 Grade	Yield Point (KSI) [MPa]	Tensile Strength (KSI) [MPa]	Min. 8” Elongation %
Grade 42	42 [290]	60 [414]	20
Grade 50	50 [345]	65 [448]	18
Grade 55	55 [379]	70 [483]	17
Grade 60	60 [414]	75 [517]	16
Grade 65	65 [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

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

[construction_manual-1] A. (2021). Steel Construction Manual (15th ed.). AMERICAN INSTITUTE OF PHYSICS / SPRINGER.

[ASTM-2] 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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