It's the lowest strength grade in the SA-204 family (A, B, C), with specific minimum tensile/yield strength and elongation requirements, commonly used in oil, gas, and chemical industries, and available in various conditions like normalized (N) or quenched & tempered (Q+T).
ASME SA204 Grade A Steel Plate chemical composition (%) :
|
Composition |
Type |
Thickness(mm) |
A |
|
C≤ |
Heatanalyse Productanalyse |
≤25 |
0.18 |
|
＞25~50 |
0.21 |
||
|
＞50~100 |
0.23 |
||
|
＞100 |
0.25 |
||
|
Mn≤ |
Heatanalyse |
- |
0.90 |
|
Productanalyse |
- |
0.98 |
|
|
P≤,S≤ |
Heatanalyse |
- |
0.035 |
|
Productanalyse |
- |
0.035 |
|
|
Si |
Heatanalyse |
- |
0.15~0.40 |
|
Productanalyse |
- |
0.13~0.45 |
|
|
Mo |
Heatanalyse |
- |
0.45~0.60 |
|
Productanalyse |
- |
0.41~0.64 |
ASME SA204 Gr.A steel Mechanical Properties:
|
Grade |
TensileStrengthkis [MPa] |
YieldStrengthmin,kis [MPa] |
Elongationin8in.[200mm], min,% |
Elongationin2in.[50mm], min,% |
|
SA204GrA |
65-85[450-585] |
37[255] |
19 |
23 |
ASME SA204 Gr.A steel chief application:
ASME SA204 Gr.A pressure vessel steel is widely used in petroleum, chemical industry, power station, boiler, etc, used to make the reactor, heat exchanger, separator, spherical tank, liquefied gas, nuclear reactor pressure vessel, boiler steam drum steam, liquefied petroleum, hydropower station, high pressure pipe.
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