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ASTM A204 Gr.A this property is based on it's Mo composition. ASTM A-204/A-204M A204 has three grades or levels-- Grade A/B/C. A204 steel gradespecification covers molybdenum alloy, intended particularly of welded boilers and others pressure vessels steel plate in A204 Gr. A,A204 Gr .B and A204 Gr .C.
Standard: ASTM A-204/A-204M
Dimension range :1.5mm -260mm x 1000mm-4000mm x 1000mm-18000mm
A204 Gr.A steel plate Mechanical Properties
Mechanical Properties
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Grade |
Thickness |
Yield Strength |
Tensile Strength |
Elongation |
Charpy V Notch Impact Test |
|
Degree |
Min Value |
|||||
A204Gr.A |
mm |
Min Mpa |
Mpa |
Min % |
- |
J |
5≤t≤50 |
275 |
485-620 |
21% |
- |
||
50≤t≤100 |
275 |
485-620 |
17% |
|
|
|
Note: Impact energy for impact test is on longitudinal |
A204 Gr.A Boiler steel plate Chemical Composition
Chemical Composition
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Grade |
The Element Max (%) |
||||||
C |
Si |
Mn |
P |
S |
Mo |
N |
|
A204Gr.A |
0.20-0.27 |
0.13-0.45 |
0.90-0.98 |
0.035 |
0.035 |
0.41-0.64 |
|
Delivery Status :Normalizing + tempering or tempering state
A204 Gr.A structural steel plate Application :
ASTM A204 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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