Description
Product Description
ASTM A709 Steel Plate is a high-strength, low-alloy structural steel used in bridge construction and other structural applications. It is specifically designed for improved toughness and durability, withstanding harsh environmental conditions such as weathering and corrosion. ASTM A709 steel plate offers excellent weldability, high strength, and toughness, making it ideal for critical infrastructure projects.
Key Features of ASTM A709 Steel Plate:
- High Strength: Ensures superior load-bearing capacity for large structures.
- Weathering Resistance: Available in grades with enhanced atmospheric corrosion resistance, which is critical for long-term outdoor exposure.
- Toughness: High impact resistance, especially in cold temperatures, making it suitable for various climates and seismic areas.
- Weldability: Excellent for welding, and crucial for constructing large structures like bridges.
- Durability: Designed to last in extreme conditions, reducing maintenance costs and extending the life of structures.
Common Grades of ASTM A709:
- Grade 36: Standard structural steel for lighter, non-critical applications.
- Grade 50: A more robust option with a minimum yield strength of 50,000 psi.
- Grade 50W: Weathering steel with corrosion resistance, often used for unpainted structures.
- Grade 100 & 100W: High-strength steel for large-scale, high-stress applications.
Common Applications:
- Bridge construction (both small and large span bridges)
- Highway overpasses
- Infrastructure projects requiring long-lasting, low-maintenance materials
ASTM A709 Steel Plate is a versatile and reliable choice for engineers and architects working on large-scale infrastructure projects where performance and longevity are key.
ASTM A709 Chemical Composition
Element | Grade 36 (%) | Grade 50 (%) | Grade 50W (%) | Grade 100 (%) | Grade 100W (%) |
Carbon (C) | 0.26 max | 0.23 max | 0.19 max | 0.20 max | 0.20 max |
Manganese (Mn) | 0.80-1.35 | 0.50-1.50 | 0.50-1.50 | 0.70-1.60 | 0.70-1.60 |
Phosphorus (P) | 0.04 max | 0.04 max | 0.04 max | 0.03 max | 0.03 max |
Sulfur (S) | 0.05 max | 0.05 max | 0.05 max | 0.05 max | 0.05 max |
Silicon (Si) | 0.15-0.40 | 0.15-0.40 | 0.15-0.40 | 0.15-0.40 | 0.15-0.40 |
Copper (Cu) | - | - | 0.20-0.40 | 0.35 max | 0.35 max |
Nickel (Ni) | - | - | 0.40 max | 0.40 max | 0.40 max |
Chromium (Cr) | - | - | 0.40-0.65 | 0.40-0.65 | 0.40-0.65 |
Molybdenum (Mo) | - | - | 0.15 max | 0.15 max | 0.15 max |
Vanadium (V) | - | - | 0.02-0.10 | 0.02-0.10 | 0.02-0.10 |
ASTM A709 Mechanical Properties
Property | Grade 36 | Grade 50 | Grade 50W | Grade 100 | Grade 100W |
Yield Strength (ksi) | 36 min | 50 min | 50 min | 100 min | 100 min |
Tensile Strength (ksi) | 58-80 | 65-85 | 70-95 | 110-130 | 110-130 |
Elongation (%) | 20 | 18 | 16 | 14 | 14 |
Charpy V-Notch (ft-lbs) | N/A | 15 min | 15 min | 35 min | 35 min |
ASTM A709 Physical Properties
Property | Value |
Density | 7.85 g/cm³ (7850 kg/m³) |
Elastic Modulus | 200 GPa |
Poisson’s Ratio | 0.3 |
Thermal Conductivity | 43 W/m-K |
Melting Point | 1425-1530°C |
Specific Heat Capacity | 486 J/kg-K |
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