High-Strength Low-Alloy Structural Carbon Steel (HSLA)
BMG offers a wide range of steel plate, including carbon steel (also known as mild steel) and High-Strength Low-Alloy (HSLA) steel.
Steel A572 Grade 42, 50, 55, 60, 65
A572 steel is a High-Strength Low-Alloy (HSLA) structural steel primarily used in construction applications and other industries that require materials with high tensile and yield strength. It is available in five different grades: 42, 50, 55, 60, and 65.
A572 steel is characterized by its light weight relative to its high strength, hardness, and ability to support weight. Its chemical composition provides excellent mechanical properties, making it ideal for structures that must withstand high stresses and loads. It is easy to form and weld, which increases its usefulness in the construction sector.
- High strength and ability to support heavy loads.
- Lightweight compared to other steels with similar characteristics.
- Easy to weld, which speeds up construction timelines.
- Ideal for slim and cost-effective structural designs.
- Good ductility and machinability.
- Versatile—adapts to different environmental conditions and climates.
- Infrastructure: bridge and building construction.
- Energy sector: transmission tower construction.
- Construction: manufacturing of construction equipment.
- Industrial manufacturing: production of machinery and truck spare parts.
- Other applications: road plates and other high-strength structures. Suitable for structures that require high strength and low weight, such as bridges, buildings, and other engineering applications.
| Component | Maximum value |
| Carbon (C) | 0.21% |
| Manganese (Mn) | 1.35% |
| Phosphorus (P) | 0.030% |
| Sulfur (S) | 0.030% |
| Silicon (Si) | Up to 1 1/2": 0.40% Over 1 1/2": 0.15–0.40% |
Note: The carbon and manganese percentages may increase depending on the required grade.
Grade | Yield strength | Tensile strength | Elongation |
42 | 42 | 60 | 20 |
50 | 50 | 65 | 18 |
55 | 55 | 70 | 17 |
60 | 60 | 75 | 16 |
65 | 65 | 80 | 15 |
Plate thickness: Available in standard and heavy plate thicknesses, with thicknesses up to 3 inches or more.
A572 Grade 50: Equivalent high-strength steel commonly used in construction.
A572 Grade 50 steel is highly efficient for structural construction projects due to its combination of high strength, light weight, and ease of fabrication. It also offers good adaptability to different climates, although its susceptibility to corrosion must be considered if proper precautions are not taken.