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SA203Gr.D steel for ultra-low temperature pressure vessel plate

SA203Gr.D steel for ultra-low temperature pressure vessel plate

Posted:2021-07-02 14:21:07

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.

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