SA 203 GR.D Alloy Pressure Vessel Steel plate

SA 203 Grade D is a specification for pressure vessel steel plate, which is used for high-temperature service applications. The "SA" in SA 203 stands for "Specification for ASME (American Society of Mechanical Engineers) A/SA-203."

The steel plate is composed of alloy materials, including nickel, chromium, and molybdenum, which provide excellent resistance to high-temperature environments. The plate is also designed to withstand high-pressure applications, making it suitable for use in pressure vessels and boilers.

The mechanical properties of SA 203 Grade D steel plate are as follows:
Tensile strength: 65-85 ksi (450-585 MPa)
Yield strength: 37 ksi (255 MPa)
Elongation in 2 inch (50 mm): 19%
These mechanical properties are achieved through appropriate heat treatment during manufacturing, including quenching and tempering.