Listing ID #4138165
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Both SA387 and A387 are described as a "Standard Specification for Pressure Vessel Plates, Alloy Steel, Chromium-Molybdenum". The specification covers alloy steel plates intended primarily for welded boilers and pressure vessels designed for elevated temperature use.
Plates are available under these specifications in several grades each having different nominal Chromium (Cr) and Molybdenum (Mo) contents as follows:
|
Grade |
Nominal Cr Content (%) |
Nominal Mo Content (%) |
|
2 |
0.50 |
0.50 |
|
12 |
1.00 |
0.50 |
|
11 |
1.25 |
0.50 |
|
22, 22L |
2.25 |
1.00 |
|
21, 21L |
3.00 |
1.00 |
|
5 |
5.00 |
0.50 |
|
9, 91 |
9.00 |
1.00 |
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