ASTM A709 Grade 50 / A709 Gr.50 Plate Manufacturer, Supplier & Exporter in India
Welcome to ASC LLP, your premier source for high-quality ASTM A709 Grade 50 plates. As an experienced ASTM A709 structural steel plate supplier, we provide premium-quality high strength structural steel plate that complies with ASTM specifications, ensuring superior mechanical properties, dimensional accuracy, and long service life. Our inventory includes standard ASTM A709 Grade 50, weather-resistant ASTM A709 Grade 50W weathering steel plate, and customized plate sizes suitable for domestic and international structural engineering projects.
What is ASTM A709 Grade 50 Plate?
ASTM A709 Grade 50 plate is a high-strength low-alloy (HSLA) steel plate developed primarily for bridge construction and structural engineering applications. It offers a minimum yield strength of 50 ksi (345 MPa), excellent weldability, superior notch toughness, and outstanding performance under dynamic loading conditions. ASTM A709 Grade 50 plates, sometimes supplied as weathering steel plate in the 50W variant, are widely used in bridges, highway structures, heavy buildings, industrial platforms, cranes, and infrastructure projects.
ASTM A709 Grade 50 / A709 Gr.50 Plate Supplier in India
We supply ASTM A709 Grade 50 plates that are manufactured using advanced rolling processes and strict quality control procedures to ensure consistent mechanical performance. Every bridge steel plate undergoes thorough inspection before dispatch to ensure compliance with ASTM dimensional tolerances and customer project specifications.
Being an established ASTM A709 structural steel plate supplier, we understand the demanding requirements of fabrication industries. Structural fabricators require weldable structural steel that offers dependable weldability, excellent impact resistance, and consistent strength throughout the plate thickness. Our supplied plates are suitable for both welded and bolted structural assemblies.
Whether your project involves bridge fabrication, industrial structures, transportation infrastructure, or heavy equipment manufacturing, our ASTM A709 plates deliver the performance expected from structural carbon steel plate.
What is ASTM A709 Grade 50 Steel?
ASTM A709 is a standard specification covering ASTM structural steel intended primarily for bridges and similar structural applications. Grade 50 is among the most commonly used grades due to its balance of the following properties:
- High Yield Strength: This high yield steel plate ensures structural integrity and load-bearing capacity under demanding conditions.
- Excellent Weldability: Can be easily welded using standard welding procedures, making it suitable for various fabrication processes.
- Good Formability: Allows intricate designs and shapes to be achieved without compromising structural integrity.
- Superior Impact Toughness: Maintains good impact toughness, ensuring reliable performance even under dynamic loads and stress.
- Reliable Fatigue Resistance: Well suited to structures subjected to repeated loading and vibration, such as bridge construction steel.
- Excellent Fabrication Characteristics: Performs consistently across cutting, forming, and welding operations.
The material is suitable for structures subjected to repeated loading, vibration, and environmental exposure.
Features of ASTM A709 Grade 50 Plate
ASTM A709 Grade 50 structural plates, a leading choice among HSLA steel plate products, are preferred because they provide:
- High Structural Strength
- Excellent Weldability
- Outstanding Impact Resistance
- Good Machinability
- Consistent Mechanical Performance
- Superior Fabrication Properties
- Excellent Dimensional Stability
- Reliable Fatigue Strength
- Long Service Life
- Cost-Effective Structural Solution
These characteristics make this construction steel plate suitable for demanding civil engineering projects.
ASTM A709 Grade 50W Plate
ASTM A709 Grade 50W is the weathering steel plate version of Grade 50. It contains alloying elements such as copper, chromium, nickel, and phosphorus that develop a protective oxide layer (patina) on the surface.
Advantages of ASTM A709 Grade 50W include:
- Improved atmospheric corrosion resistance
- Reduced maintenance costs
- Longer service life
- Attractive weathered appearance
- Ideal for exposed steel structures
- Lower lifecycle maintenance expenses
Grade 50W is extensively used in highway bridges, railway bridges, architectural structures, and outdoor industrial installations.
Available Sizes of ASTM A709 Grade 50 Plates
| Plate Thickness (mm) | Plate Width (mm) | Plate Length (mm) |
| 6 | 1000 – 3500 | Up to 12000 |
| 8 | 1000 – 3500 | Up to 12000 |
| 10 | 1000 – 3500 | Up to 12000 |
| 12 | 1000 – 3500 | Up to 12000 |
| 16 | 1000 – 3500 | Up to 12000 |
| 20 | 1000 – 3500 | Up to 12000 |
| 25 | 1000 – 3500 | Up to 12000 |
| 30 | 1000 – 3500 | Up to 12000 |
| 40 | 1000 – 3500 | Up to 12000 |
| 50 | 1000 – 3500 | Up to 12000 |
| 75 | 1000 – 3500 | Up to 12000 |
| 100 | 1000 – 3500 | Up to 12000 |
| 150 | 1000 – 3500 | Up to 12000 |
We also supply custom-cut sizes, plasma-cut components, and flame-cut profiles according to project requirements.
ASTM A709 Grade 50 Plate Mechanical Properties
| Property | Value |
| Yield Strength | 345 MPa (50 ksi) Min |
| Tensile Strength | 450 – 620 MPa |
| Elongation | 18 – 21% |
| Impact Toughness | Excellent |
| Hardness | Moderate |
These mechanical properties make ASTM A709 Grade 50 ideal for structural applications requiring both strength and ductility.
Specifications Chart
| Specification | Details |
| Standard | ASTM A709 |
| Grade | Gr50 / Gr50W |
| Type | Structural Steel |
| Heat Treatment | As-Rolled or Normalized |
| Thickness Range | 6 mm – 150 mm |
| Width Range | 1000 mm – 3500 mm |
| Length Range | Up to 12000 mm |
ASTM A709 Grade 50 Plate Chemical Composition
| Element | Composition (%) |
| Carbon (C) | 0.23 Max |
| Manganese (Mn) | 0.50 – 1.35 |
| Phosphorus (P) | 0.04 Max |
| Sulfur (S) | 0.05 Max |
| Silicon (Si) | 0.15 – 0.40 |
| Copper (Cu) (50W) | As Specified |
| Chromium (Cr) (50W) | As Specified |
| Nickel (Ni) (50W) | As Specified |
Chemical composition may vary slightly depending on the manufacturing process and supplementary requirements.
Physical Properties Chart
| Property | Value |
| Density | 7.85 g/cm³ |
| Modulus of Elasticity | 200 GPa |
| Poisson’s Ratio | 0.30 |
| Thermal Conductivity | 45 W/m·K |
| Specific Heat | 0.49 J/g·°C |
| Melting Point | 1425 – 1540 °C |
Applications of ASTM A709 Grade 50 Structural Steel Plate
| Application | Description |
| Bridge Construction | Designed specifically for bridge fabrication where structural integrity is critical, making it a preferred ASTM bridge plate. |
| Highway Infrastructure | Used in overpasses, flyovers, pedestrian bridges, and elevated road systems. |
| Commercial Buildings | Ideal for high-rise structural frameworks requiring high load-bearing capacity. |
| Industrial Structures | Used in factories, warehouses, manufacturing plants, and processing facilities. |
| Heavy Equipment | Suitable for cranes, lifting equipment, construction machinery, and mining equipment. |
| Offshore and Marine Structures | Selected structural components where strength and durability are essential. |
| Railway Infrastructure | Applied in railway bridges, platforms, support frames, and transportation projects. |
| Power Plants | Used for structural frameworks supporting heavy industrial equipment. |
Why Choose ASTM A709 Grade 50 Plate?
Compared to conventional carbon structural steel, ASTM A709 Grade 50 offers numerous advantages:
- Higher Strength: Its higher yield strength enables lighter structural designs while maintaining safety.
- Excellent Weldability: Low alloy content supports efficient welding with reduced risk of cracking.
- Superior Toughness: Designed to perform reliably under cyclic loading and low-temperature conditions.
- Better Structural Performance: Excellent resistance to fatigue makes it suitable for bridges and transportation infrastructure.
- Long-Term Reliability: Provides dependable performance throughout the structure’s design life.
Quality Assurance
Every ASTM A709 Grade 50 plate supplied by us undergoes comprehensive quality inspection. Quality checks include:
- Chemical composition verification
- Mechanical testing
- Ultrasonic testing (UT) where required
- Dimensional inspection
- Visual examination
- Surface quality inspection
- Mill Test Certificate (MTC) verification
- Third-party inspection on request
This ensures customers receive an infrastructure steel plate that complies with ASTM standards and project specifications.
Why We Are a Preferred ASTM A709 Structural Steel Plate Supplier
Customers choose us because we focus on supplying quality structural plate exporter products backed by technical expertise and dependable service. Our strengths include:
- Extensive stock availability
- Competitive pricing
- Fast delivery schedules
- Customized plate cutting services
- Experienced export team
- Strict quality control
- International shipping support
- Responsive customer assistance
- Reliable documentation
- Long-term supply capability for infrastructure projects
Our objective is to help contractors, EPC companies, bridge fabricators, and engineering firms source steel plate manufacturer products with confidence.
ASTM A709 Gr50 Plates Suppliers
At ASC LLP, we are proud to be a leading supplier of ASTM A709 Gr50 plates. We source our plates from reputable manufacturers to ensure the highest quality and compliance with industry standards. Our team of experts is dedicated to providing exceptional service and support, helping you select the right plates for your specific needs.
ASTM A709 plates are an excellent choice for applications requiring high strength, durability, and resistance to environmental conditions. Whether you are involved in bridge construction, highway infrastructure, architectural projects, or industrial applications, this heavy structural steel offers superior performance and reliability.
Global Reach
ASC LLP boasts a robust global presence, committed to delivering unparalleled service and quality to clients around the world. Our dedication to prompt delivery and exceptional customer care sets us apart in the industry. Major corporations across the USA, Europe, Asia, and other regions place their trust in our high-quality ASTM A709 Grade 50 Plates. This widespread trust underscores our reputation for reliability and excellence. By consistently meeting and exceeding the expectations of our international clientele, we continue to solidify our position as a leader in the global steel market.
Frequently Asked Questions
What is ASTM A709 Grade 50 plate used for?
ASTM A709 Grade 50 plates are primarily used for bridge construction, highway infrastructure, buildings, industrial structures, cranes, heavy equipment, and transportation projects requiring high-strength structural steel.
Is ASTM A709 Grade 50 weldable?
Yes. ASTM A709 Grade 50 offers excellent weldability and is widely used in fabricated structural components using standard welding procedures.
What is the difference between ASTM A709 Grade 50 and ASTM A709 Grade 50W?
Grade 50 is a high-strength structural steel, while ASTM A709 Grade 50W contains alloying elements that improve atmospheric corrosion resistance by forming a protective weathered surface.
What certificates are supplied with ASTM A709 plates?
Typically, Mill Test Certificates (EN 10204 3.1), chemical composition reports, mechanical testing reports, and third-party inspection certificates are available upon request.
Can ASTM A709 Grade 50 plates be supplied in custom sizes?
Yes. Plates can be supplied in custom thicknesses, widths, lengths, and cut-to-size dimensions according to project specifications.
Countries We Export To
UNITED STATES, EUROPE, UK, UAE, SAUDI ARABIA, OMAN, KUWAIT, JORDAN, QATAR, INDONESIA, MALAYSIA, BRAZIL, SPAIN, ITALY, FRANCE, GERMANY, BAHRAIN, SRI LANKA, AZERBAIJAN, AUSTRALIA, AUSTRIA, PHILIPPINES, TURKEY, RUSSIA, IRAN, IRAQ, CANADA, KOREA, JAPAN, YEMEN, FINLAND, ZIMBABWE, HUNGARY, PORTUGAL, VIETNAM, MOROCCO, THAILAND, SOUTH AFRICA, MEXICO, SINGAPORE, GREECE, KUWAIT, POLAND, NEW ZEALAND, SWEDEN, SWITZERLAND, BELGIUM, BHUTAN, BANGLADESH, TAIWAN, ROMANIA, CAMBODIA, KAZAKHSTAN, AFGHANISTAN.
