The steel grade A20/A20M-17 is a specification standard for carbon steel plates, intended primarily for pressure vessel applications. It is applicable to various grades of carbon steel plates, such as A283 Grade A, A283 Grade B, A283 Grade C, A285 Grade A, A285 Grade B, A285 Grade C, and A573 Grade 58, 65, and 70.
Key Features:
1. Low and Intermediate Tensile Strength: The steel grade A20/A20M-17 specifies low and intermediate tensile strength carbon steel plates. This indicates that the steel has moderate strength and is suitable for various pressure vessel applications.
2. Chemical Composition: The chemical composition of the steel grade A20/A20M-17 includes elements such as carbon, manganese, phosphorus, sulfur, silicon, and copper. The composition may vary depending on the specific grade of carbon steel.
3. Heat Treatment: The steel grade A20/A20M-17 requires heat treatment processes such as normalizing or stress relieving to improve the mechanical properties and provide desired strength and hardness.
Mechanical Properties:
1. Tensile Strength: The steel grade A20/A20M-17 has specified minimum tensile strength ranging from 55,000 psi to 75,000 psi (380 MPa to 515 MPa), depending on the grade of carbon steel.
2. Yield Strength: The steel grade A20/A20M-17 has specified minimum yield strength ranging from 30,000 psi to 65,000 psi (205 MPa to 450 MPa), depending on the grade of carbon steel.
3. Elongation: The steel grade A20/A20M-17 has specified minimum elongation requirements, ranging from 18% to 22% depending on the grade of carbon steel. This indicates the ability of the steel to deform without breaking under tensile stress.
Applications:
The steel grade A20/A20M-17 is commonly used for pressure vessel applications in various industries, such as oil and gas, petrochemical, power generation, and aerospace. These carbon steel plates are often utilized in the construction of storage tanks, boilers, heat exchangers, and other equipment that require high strength and resistance to corrosion.
In summary, the A20/A20M-17 steel grade is a specification standard for carbon steel plates with low and intermediate tensile strength. It offers good mechanical properties and is well-suited for pressure vessel applications in various industries.