A572 steel is a high strength, low alloy steel with 5 yield point grades including grade 42, 50, 55, 60, and 65. As the grade number goes up so does the steel's tensile and yield strength. This steel is extremely versatile and used in a variety of different industries due to its strength and weldability.
A572 and its respective grades are used in industries like construction, machinery, and automotive. It is typically used for structural builds where bolting, riveting, and welding is needed. Trucks and bridges are two examples of applications that utilize A572.
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) [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 |
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.
