ASTM A204 boiler steel plate
ASTM A204 boiler steel plate pressure vessel steel sheets are molybdenum-alloy steel plates, which are particularly for welded boilers and high temperature pressure vessels. Based on it’s Mo composition, ASTM A204 boiler steel plate pressure vessel steel sheet cover 3 grades: A, B, C. The maximum plate thickness is limited only by the chemical composition to achieve certain mechanical property figure;
Introduction
Steel Properties
ASTM A204 boiler steel plate pressure vessel steel sheet chemical composition:
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Steel Grade
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The Element Max (%)
|
|||||
|
C
|
Si
|
Mn
|
P
|
S
|
Mo
|
|
|
A204 Grade A
|
0.18-0.25
|
0.13-0.45
|
0.90-0.98
|
0.035
|
0.035
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0.45–0.60
|
|
A204 Grade B
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0.20-0.27
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0.13-0.45
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0.90-0.98
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0.035
|
0.035
|
0.45–0.60
|
|
A204 Grade C
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0.23-0.28
|
0.13-0.45
|
0.90-0.98
|
0.035
|
0.035
|
0.45–0.60
|
ASTM A204 boiler steel plate pressure vessel steel sheet mechanical properties:
|
ASTM A204
|
Grade A
|
Grade B
|
Grade C
|
|
Tensile strength, kis [MPa]
|
65-85 [450-585]
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70-90 [485-620]
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75-95 [515-655]
|
|
Yield strength, min, kis [MPa]
|
37 [255]
|
40 [275]
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43 [295]
|
|
Elongation in 8 in. [200 mm], min, %
|
19
|
17
|
16
|
|
Elongation in 2 in. [50 mm], min, %
|
23
|
21
|
20
|
Application
ASTM A204 boiler steel plate pressure vessel steel sheets are 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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