Chemical Composition:
The chemical composition of A837/A837M-17 steel grade is as follows:
– Carbon (C): 0.15% max
– Manganese (Mn): 0.60-0.90%
– Phosphorus (P): 0.025% max
– Sulfur (S): 0.025% max
– Silicon (Si): 0.15-0.35%
Mechanical Properties:
The mechanical properties of A837/A837M-17 steel grade are as follows:
– Tensile Strength: 70,000-90,000 psi
– Yield Strength: 45,000 psi min
– Elongation in 2 inches: 22% min
– Reduction of Area: 40% min
– Charpy V-notch Impact Test: 20 ft-lbf min at -20°F
Standard Number:
A837/A837M-17 is the ASTM (American Society for Testing and Materials) standard number for this steel grade. This standard specifies the requirements for hot-rolled structural steel plates for use in welded construction of building and other structures.
Uses and Benefits in Modern Construction:
A837/A837M-17 steel grade has several uses and benefits in modern construction. Some of these include:
1. Structural Applications: This steel grade is commonly used for the construction of buildings, bridges, and other structures where high strength and durability are required.
2. Weldability: A837/A837M-17 steel grade has excellent weldability, making it suitable for structural welding applications. It can be easily welded using common welding techniques, such as arc welding, gas welding, and resistance welding.
3. High Tensile Strength: With a tensile strength range of 70,000-90,000 psi, this steel grade offers high strength properties, ensuring structural integrity and load-bearing capacity for construction projects.
4. Good Impact Resistance: The Charpy V-notch impact test requirement of 20 ft-lbf at -20°F indicates that this steel grade has good resistance to impact loads. This is particularly important in areas prone to harsh weather conditions or seismic activities.
5. Cost-Effective: A837/A837M-17 steel grade is cost-effective compared to some other high-strength steel grades. It provides a balance between strength, durability, and cost, making it an attractive choice for modern construction projects.
Overall, A837/A837M-17 steel grade offers a combination of strength, weldability, impact resistance, and cost-effectiveness, making it a suitable choice for various applications in modern construction. Its chemical composition and mechanical properties meet the requirements set by the ASTM standard, ensuring high-quality and reliable performance in structural applications.