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SA387 Gr.22 Class 2 Steel Plate Pressure Vessel Plate Width 1000-2200mm Steel Plates
ASTM A387 Grade 22 (ASME SA387 Grade 22) is Chrom-Moly steel plate used for making boilers and pressure vessles designed for high temperature high pressure serivce, chrome content at 2.00% to 2.50%, and Moly 0.90% to 1.10% for SA387 GRADE 22 material.
The more content of chromium will provide better corrosion and oxidation resistance, ASTM A387 Grade 22 / ASME SA387 Grade 22 material could be used storage oil, gas, or other liquid for industries, and also compatible with sour services.
A20/A20M: General requirements for pressure vessel plates.
A370: Test specification for mechanical properties of steel
A435/A435M: For straight-beam ultrasonic examination of steel
plates
A577/A577M: For ultrasonic angle beam examination of steel plates
A578/A578M: For straight beam UT examination of rolled steel plates
in special applications
A1017/A1017M: Specification for pressure vessle plates of alloy
steel, chromium-molybdenum-tungsten
A5.5/A5.5M: Low alloy steel electrodes for shield metal arc
welding.
A5.23/A5.23M: Low alloy steel electrodes for fulxes for submerged
arc welding.
A5.28/A5.28M: For gas shielded arc welding
A5.29/A5.29M: For flux cored arc welding.
Grade | Nominal Chromium Content, % | Nominal Molybdenum Content, % |
|---|---|---|
11 | 1.25 | 0.50 |
22, 22L | 2.25 | 1.00 |
5 | 5.00 | 0.50 |
9 | 9.00 | 1.00 |
91 | 9.00 | 1.00 |
Chrome moly alloy steel plate under ASTM A387 shall be killed steel, with thermally treated either by annealing, normarlizing and tempering. Or in case agreed by buyer, accelerated cooling from the austenitizing temperature by air blasting or liquid quenching, followed by tempering, minimum tempering temperatures shall be as below table:
Grade | Temperature, °F [°C] |
|---|---|
2, 12 and 11 | 1150 [620] |
22, 22L, 21, 21L and 9 | 1250 [675] |
5 | 1300 [705] |
