ASTM A387 Grade 22 Class 1 is a chromium-molybdenum (Cr-Mo) alloy steel plate designed for high-temperature service in welded pressure vessels, boilers, and heat exchangers, featuring good ductility and weldability, with specific mechanical properties for standard pressure vessel applications, distinguishing it from Class 2 by having less stringent low-temperature impact requirements. Its key features are excellent strength and resistance to oxidation and corrosion at elevated temperatures, commonly used in oil, gas, and petrochemical industries.
A387 Grade 22 Cl 1 Steel Plate Equivalent Standard :
| BS | EN | ASTM/ASME | DIN |
| 622-515B | 10 CRMO 910 | A387 / SA 387 | 10 CRMO 910 |
Alloy Steel ASTM A387 GR 22 CL. 1 Plates Chemical Composition :
| C | Mn | P | S | Si | Cr | Mo |
| 0.04 - 0.15 | 0.25 - 0.66 | 0.035 | 0.035 | 0.5 max | 1.88 - 2.62 | 0.85 - 1.15 |
Alloy steel ASME SA387 GR. 22 CL. 1 Plates Mechanical Properties :
| A387 / SA387 Grade 22 | Class 1 | Class 2 |
| Tensile Strength (ksi) | 60-85 | 75-100 |
| Tensile Strength (MPa) | 415-585 | 515-690 |
| Yield Strength (ksi) | 30 | 45 |
| Yield Strength (MPa) | 205 | 310 |
| Elongation in 200mm (%) | - | - |
| Elongation in 50mm (%) | 18 | 18 |
| Reduction of area in % | 45 | 45 |
Key Applications:
Petrochemical & Oil/Gas: High-temperature piping, storage tanks, reactors, and vessels for sour gas service.
Power Generation: Components in boilers, superheaters, and furnace parts in thermal power plants.
Chemical Processing: Equipment for handling corrosive substances at high temperatures.
General High-Temperature Equipment: Where structural integrity under elevated temperatures and pressures is required.
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1.What is A387 grade 22 material?
Chrome Molybdenum Steel – ASTM A387 Grade 22 Class 2. The A387 Grade 22 Class 2 – a grade of chromium-molybdenum alloy – is mainly intended for use in pressure vessels and welded boilers, which are designed for use in elevated temperature service.
2.What is A387 gr22 equivalent to?
Other designations that are equivalent to AISI A387 grade 22-PVQ alloy steel include the following: ASTM A182 (F22-1) ASTM A199 (T22) ASTM A200 (T22)
3.What is A387 material?
A387 Grade 12 Class 2 is a high quality chrome molybdenum steel which is ideal for elevated temperature service and offers excellent anti corrosion characteristics. The steel has a wide range of uses including industrial boilers and pressure vessels, especially in environments where high temperature levels are common.