Products Description
ASTM A572 Grade 50 is a high-strength, low-alloy (HSLA) steel engineered for structural applications requiring superior strength while preserving excellent workability.
Enhanced with niobium and vanadium, it offers outstanding formability and reliability. Widely utilized in bridge steel plates and structural components, A572 Grade 50 performs well under impact-heavy and fatigue-prone conditions.
This versatile carbon steel plate is suitable for riveted, bolted, or welded structures in machinery, towers, and marine frameworks.
Gnee's A572 Grade 50 plates comply fully with ASTM specifications, providing stable performance and consistent quality for international projects.
Chemical Composition
| Chemical | Composition |
|
Carbon max |
0.23% |
|
Manganese max |
1.35% |
|
Phosphorus max |
0.030% |
|
Sulfur max |
0.030% |
|
Silicon to 1 1/2" thick. max |
0.40% |
|
Silicon over 1 1/2" thick |
0.15-0.40% |
Mechanical Properties
| Hardness, Brinell | 135 | 135 | based on conversion from tensile strength |
| Hardness, Rockwell B | 74 | 74 | based on conversion from tensile strength |
| Tensile Strength, Ultimate | 450 MPa | 65300 psi | |
| Tensile Strength, Yield | 345 MPa | 50000 psi | |
| Elongation at Break | 18 % | 18 % | In 200 mm |
| 21 % | 21 % | In 50 mm | |
| Bulk Modulus | 160 GPa | 23200 ksi | Typical for steel |
| Shear Modulus | 80.0 GPa | 11600 ksi | Typical for steel |
FAQ
Q: What is ASTM A572 Grade 50 Steel?
A: ASTM A572 Grade 50 steel is a high-strength low-alloy (HSLA) structural steel used in construction, bridges, and machinery. It offers a minimum yield strength of 345 MPa, tensile strength of 450 MPa, and excellent corrosion resistance, making it suitable for outdoor and structural applications. Typical thickness ranges from 6 mm to 200 mm, with widths of 1500–3200 mm and lengths up to 18,000 mm.
Q: What is the difference between A572 Gr.50 and A36?
A: Compared with A36 steel, A572 Grade 50 provides:
Higher yield strength: 345 MPa vs 250 MPa
Tensile strength: 450 MPa vs 400–550 MPa
Improved alloy content (niobium and vanadium) for better durability and fatigue resistance in bridges, buildings, and industrial structures.
Suitable for welded, bolted, or riveted assemblies, whereas A36 is mainly used in basic structural applications.
Q: What are the mechanical properties of ASTM A572 Grade 50?
A: Yield Strength (ReH): ≥345 MPa
Tensile Strength (Rm): 450–620 MPa
Elongation (A): ≥18%
Impact Energy (optional, Charpy V-notch at 0°C): ≥27 J
Applicable thickness: 6–200 mm
These properties ensure strong structural performance while maintaining ductility and weldability for bridges, low-rise buildings, and machinery structures.
Q: What are the equivalent materials of ASTM A572 Gr.50?
A: ASTM A572 Grade 50 is equivalent to several international standards:
Standard Equivalent Grade
EN S355JR
DIN St52-3
JIS SM490A
GB Q345D
These equivalents enable global sourcing and comparison, making A572 Grade 50 versatile for international projects.
Q: Where can I buy ASTM A572 Gr.50 steel plates in China?
A: Gnee, a leading ASTM A572 Grade 50 steel supplier in China, offers:
In-stock availability for common sizes: thickness 6–200 mm, width 1500–3200 mm, length up to 18,000 mm
Custom cut-to-size service for specific projects
Fast delivery nationwide for bridges, construction, and machinery fabrication
Q: What is the price of A572 Grade 50 steel per ton?
A: The price of A572 Grade 50 steel plate depends on:
Order quantity (smaller orders cost slightly more per ton)
Dimensions (thickness, width, length)
Market fluctuations in alloying elements like niobium and vanadium
For reference: Gangsteel provides competitive rates and offers custom quotes based on your required size and volume.
