1.1 This specification covers Chromium-Molybdenum-Tungsten alloy steel plates intended primarily for welded boilers and pressure vessels designed for elevated temperature service.
1.2 Plates are available under this specification in grades having different alloy contents as follows:
Grade | Nominal | Nominal | Nominal |
|
|
|
|
23 | 2.25 | 0.20 | 1.60 |
911 | 9.00 | 1.00 | 1.00 |
92 | 9.00 | 0.45 | 1.75 |
122 | 12.00 | 0.40 | 2.00 |
1.3 The maximum thickness of plates is limited only by the capacity of the composition to meet the specified mechanical property requirements.
1.4 The specification is expressed in both i......
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