ASTM A572 steel is a common high strength, low alloy (HSLA) structural steel used in the United States. A572 steel properties are specified by ASTM International standards.
Grades
A572 steel has five different grades: 42, 50, 55, 60 and 65. Each of these grades differ in their mechanical properties and chemical composition.
Chemical Composition
| 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 Grade | Yield Point (KSI) | Tensile Strength (KSI) | Min. 8” Elongation % |
|---|---|---|---|
| Grade 42 | 42 | 60 | 20 |
| Grade 50 | 50 | 65 | 18 |
| Grade 55 | 55 | 70 | 17 |
| Grade 60 | 60 | 75 | 16 |
| Grade 65 | 65 | 80 | 15 |
Forms
A572 steel is produced in a variety of different steel forms, which include:
- Plates
- 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. These applications include structural sections, reinforcing bars, bridges, skyscrapers and houses.
References
- ^ A. (2021). Steel Construction Manual (15th ed.). AMERICAN INSTITUTE OF PHYSICS / SPRINGER.
- ^ 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.