SA203Gr.D steel plate belongs to ultra-low temperature pressure vessel steel plate. ASME SA203 is a low-nickel alloy steel, including five grades A, B, D, E, and F. Among them, D, E, F have a nominal nickel content of 3.5%, commonly known as 3.5Ni steel. SA203Gr.D has good impact toughness and mechanical properties in a low temperature environment, and is usually used in a low temperature environment of -70 to -101°C (the tempered state can reach -107°C).
SA203Gr.D delivery status: generally normalizing, normalizing and tempering or quenching and tempering treatment (quenching + tempering)
SA203Gr.D chemical composition(%, by mass)
Grade |
Thickness, mm |
C |
Mn |
P |
S |
Si |
Ni |
|
SA203GrD |
≤50 |
≤0.17 |
≤0.70 |
≤0.025 |
≤0.025 |
0.15-0.40 |
3.25-3.75 |
|
50-100 |
≤0.20 |
≤0.80 |
≤0.025 |
≤0.025 |
0.15-0.40 |
3.25-3.75 |
SA203Gr.D steel mechanical properties
Grade |
Tensile strength, Mpa |
Yield strength, ReH MPa |
Elongation 8in(200mm),min,% |
Elongation 2in(50mm),min,% |
|
SA203GrD |
450-585 |
≥255 |
≥19% |
≥23% |
Impact performance of SA203Gr.D, E, F steel
Grades |
Delivery status |
Thickness, (mm) |
Impact test temperature (℃) |
|
SA203GrD |
Normalizing |
≤50 |
-101 |
|
50-100 |
-87 |
||
|
SA203GrE |
Normalizing |
≤50 |
-101 |
|
50-100 |
-87 |
||
|
SA203GrF |
Tempering |
≤50 |
-107 |
|
50-100 |
-107 |
SA203Gr.D steel plate production specifications
Specifications: Thickness: 8-110mm, width: 1600-4020mm, length: 6000-18800mm.
SA203Gr.D pressure vessel plate application range: It is widely used in the production and processing of equipment in the fields of cryogenic separation processing, air separation, and liquefied gas storage. In the past few years, large-scale low-temperature equipment such as CO2 absorption towers, H2S absorption towers, H2S concentration towers, methanol scrubbers and other large-scale equipment in domestic coal chemical projects have been manufactured with a large number of such materials, and the currently used larger thickness is 110mm.
