A572Grade 50 steel plate and A573Grade 70 steel plate are both high-strength, low-alloy structural steel plates commonly used in construction and other industrial applications.
Chemical Composition
The chemical composition of A572Grade 50 steel plate includes carbon, manganese, phosphorus, sulfur, silicon, and columbium-vanadium. The carbon content is relatively low, at 0.23%, while the manganese content ranges from 1.35% to 1.65%. Phosphorus and sulfur are present in very small amounts, typically less than 0.05%, and silicon is present at approximately 0.40%. Columbium and vanadium are added to improve the strength and toughness of the steel.
A573Grade 70 steel plate, on the other hand, contains higher levels of carbon, manganese, and phosphorus. The carbon content is 0.27-0.31%, while manganese ranges from 0.85% to 1.35%. Phosphorus and sulfur are present in very small amounts, typically less than 0.030%.
Mechanical Properties
A572Grade 50 steel plate has a yield strength of 50,000 psi and an ultimate tensile strength of 65,000-70,000 psi. It has a high elongation at break and is often used in applications where ductility is important. A572Grade 50 steel can be heat-treated to improve its mechanical properties.
A573Grade 70 steel plate, on the other hand, has a higher yield strength of 70,000 psi and an ultimate tensile strength of 90,000-100,000 psi. It is also known for its high impact toughness and good weldability. A573Grade 70 steel plate can be heat-treated to improve its mechanical properties.
Uses
A572Grade 50 steel plate is commonly used in the construction of buildings, bridges, and other structures due to its high strength and low cost. It is also used in the manufacturing of equipment and machinery parts, such as gears, axles, bolts, and shafts.
A573Grade 70 steel plate, on the other hand, is frequently used in the manufacturing of storage tanks and pressure vessels. Its high yield strength and good impact toughness make it a popular choice for these applications. While both A572Grade 50 steel plate and A573Grade 70 steel plate are high-strength, low-alloy structural steel plates, there are some key differences between the two. A572Grade 50 steel plate has a lower carbon content and is often used in building construction, while A573Grade 70 steel plate has a higher yield strength and is frequently used in the manufacturing of storage tanks and pressure vessels. Understanding these differences can help you choose the right material for your specific application.
