What is SA203 Gr.E steel plate

SA203 Gr.E steel plate is a Ni alloy steel plate for pressure vessel, which is American Standard vessel plate, and it is in accordance with American ASME standard. SA203 Gr.E is equivalent to 08Ni3DR of GB 3531, the steel plate for low temperature pressure vessel with a temperature of 100℃. There are five grades of SA203 series steel plates: A, B, D, E and F. The nominal nickel content of D, E and F is 3.5%, commonly known as 3.5Ni steel. It has good impact toughness and mechanical properties at low temperature, and is usually used in - 70 to - 101 low temperature environment (quenching and tempering state can reach - 107).

The delivery status of SA203 Gr.E steel plate is generally normalized (N), normalizing (N) + tempering (T) or quenching + tempering (QT).

SA203 Gr.E steel plate is widely used in the production and manufacturing of equipment in the field of deep cold separation and processing, air separation and liquefied gas storage. In recent years, the low-temperature large equipment such as CO2 absorption tower, H2S absorption tower, H2S concentration tower, methanol washing tower and other low-temperature large equipment in domestic coal chemical projects all use a large number of SA203 steel materials for manufacturing, and the maximum thickness currently used can reach 110mm.