What is the A203 Gr.D ASTM pressure vessel plate?

There are five grades of ASTM A203 series steel plates, namely: A, B, D, E, and F. Among them, the nickel content of D, E, and F is 3.5%, commonly known as 3.5Ni steel. And because D, E, and F have good impact toughness and mechanical properties in low temperature environment, it is usually used in -70 to -101 ( -107 degrees Celsius (quenched and tempered state) low temperature environment.

A203 Gr.D ASTM pressure vessel plate is widely used in low temperature separation, air separation, liquefied gas storage and other fields. In recent years, low-temperature equipment such as absorption towers and concentration towers in domestic coal chemical projects have adopted this material.
A203 Gr.D ASTM pressure vessel plate spot and futures rollable detailed specifications:
Specifications: Thickness: 8-110mm, width: 1600-4200mm, length: 5000-18800mm.

Mechanical properties of A203 Gr.D plate:
Yield strength ReL(MPa): ≥255
Tensile strength Rm(MPa): 450～585
Elongation A(%): ≥19

A203 Gr.D pressure vessel plate production process:
It is smelted by electric furnace + external refining + vacuum degassing, and should be fine-grained steel. The steel plate should be rolled sheet by sheet for grain size inspection, and the grain size should be 6 or more.