Detail information of ASTM A204 (gr) Grade B boiler and pressure vessel steel plate
ASTM A204 (gr) Grade B boiler and pressure vessel steel plate Overview:
ASTM A204 (gr) Grade B boiler and pressure vessel steel plate specification covers molybdenum-alloy steel plates, intended particularly for welded boilers and other pressure vessels.
ASTM A204 (gr) Grade B boiler and pressure vessel steel plate Maximum Thickness:
| Maximum Thickness for ASTM A204 Pressure Vessel Plates | |
|
Grade |
Maximum Thickness in.(mm) |
|
A |
6(150) |
|
B |
6(150) |
|
C |
4(100) |
ASTM A204 (gr) Grade B boiler and pressure vessel steel plate Chemical Requirements:
Chemical Requirements for ASTM A204 Pressure Vessel Plates |
|||
|
Elements |
Grade A |
Grade B |
Grade C |
|
Carbon, max |
|||
|
thk≤1in. (25mm) |
0.18 |
0.20 |
0.23 |
|
thk>1in.~2in. (>25~50mm) |
0.21 |
0.23 |
0.26 |
|
thk>2in.~4in.(50~100mm) |
0.23 |
0.25 |
0.28 |
|
thk>4in.(>100mm) |
0.25 |
0.27 |
0.28 |
|
Manganese, max |
|||
|
Heat Analysis |
0.90 |
0.90 |
0.90 |
|
Product Analysis |
0.98 |
0.98 |
0.98 |
|
Phosphorous, max |
0.035 |
0.035 |
0.035 |
|
Sulfur, max |
0.035 |
0.035 |
0.035 |
|
Silicon |
|||
|
Heat Analysis |
0.15-0.40 |
0.15-0.40 |
0.15-0.40 |
|
Product Analysis |
0.13-0.45 |
0.13-0.45 |
0.13-0.45 |
|
Molybdenum |
|||
|
Heat Analysis |
0.45-0.60 |
0.45-0.60 |
0.45-0.60 |
|
Product Analysis |
0.41-0.64 |
0.41-0.64 |
0.41-0.64 |
ASTM A204 (gr) Grade B boiler and pressure vessel steel plate Tensile Requirements:
Tensile Requirements for ASTM A204 Pressure Vessel Plates |
|||
|
Grade A |
Grade B |
Grade C |
|
|
Tensile Strength |
65~85 |
70~90 |
75~95 |
|
Yield Strength, min |
37(255) |
40(275) |
43(295) |
|
Elongation in 8 in.[200mm], min, % |
19 |
17 |
16 |
|
Elongation in 2 in.[50mm], min, % |
23 |
21 |
20 |
ASTM A204 (gr) Grade B boiler and pressure vessel steel plate Heat Treatment
1. Plates 11⁄2 in. [40 mm] and under in thickness are normally supplied in the as-rolled condition.
The plates may be ordered normalized or stress relieved or both.
2. Plates over 11⁄2 in. [40 mm] in thickness shall be normalized
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