ASTM A572 High Strength and High Tensile Steel is a high-strength low-alloy (HSLA) structural steel known for its excellent combination of high yield strength, good toughness, and improved weldability compared to conventional carbon steels. This grade is designed to provide superior load-bearing capacity and weight-saving advantages in demanding structural applications. ASTM A572 offers good formability, machinability, and ease of fabrication, making it suitable for complex structural components and heavy-duty constructions. It performs reliably under dynamic and static loading conditions and maintains good impact resistance at low temperatures. Typical applications include bridges, buildings, transmission towers, cranes, industrial structures, pressure vessels, and heavy engineering components where high strength, durability, and long-term structural integrity are critical.
Structural applications, heavy construction equipment,
building structures, heavy-duty anchoring systems,
truck frames, poles, liners, conveyors, boom sections,
structural steel shapes
CHEMICAL COMPOSITION OF ASME SA 572 ROUND BAR
Grade
C
Mn
P
S
Si
Nb / V
SA 572 Gr 50
0.23 max
1.35 max
0.035 max
0.035 max
0.40 max
Microalloyed
MECHANICAL PROPERTIES OF ASME SA 572 ROUND BAR
Grade
Tensile Strength (MPa)
Yield Strength (MPa)
Elongation (%)
SA 572 Gr 50
450 – 620
345 min
18 min
💡 Practical Difference in Use
Use ASTM A572 High Strength Round Bars when: high yield strength, superior load-bearing capacity, and structural reliability are required. This steel is widely used in heavy structural and high-stress applications where weight reduction and strength are critical.
→ Example: bridges, heavy structures, cranes, and transmission towers.
Bright Finished / Machined ASTM A572 Round Bars when: accurate dimensions, controlled tolerances, and reliable machining performance are essential for critical structural and mechanical components.
→ Example: high-strength shafts, anchor rods, bolts, and precision structural parts.
Applications of ASTM A572 High Strength Round Bars
ASTM A572 round bars are commonly used where high strength and long-term structural performance are required.
Bridges & Infrastructure: Structural members and reinforcements.
Heavy Engineering: Cranes, frames, load-bearing parts.
