A387 Grade 22 Class 1 is a low-alloy chromium-molybdenum steel plate compliant with ASTM A387/A387M standards, designed for high-temperature and high-pressure pressure-bearing equipment. It features excellent resistance to hydrogen corrosion, creep deformation, and thermal fatigue, widely used in harsh industrial environments.
Equivalents for ASTM A387 Grade 22 Alloy Steel Plates
| BS | EN | ASTM/ASME | DIN |
| 622-515B | 10 CRMO910 | A387-22-1 | 10 CRMO910 |
Specifications for ASTM A387 Grade 22 Alloy Steel Plates
| Designation | Nominal Chromium Content (%) |
Nominal Molybdenum Content (%) |
| A387 Grade 22 | 2.25% | 1.00% |
Tensile Requirements for ASTM A387 Grade 22 Alloy Steel Plates Class 1 Plates
| Designation: | Requirement: | Grade 22 |
| A387 Grade 22 | Tensile strength, ksi [MPA] | 75 to 100 [515 to 690] |
| Yield strength, min, ksi [MPa]/(0.2% offset) | 45 [310] | |
| Elongation in 8 in. [200mm], min % | ... | |
| Elongation in 2 in. [50mm], min, % | 18 | |
| Reduction of area, min % | 45 (measured on round specimen) 40 (measured on flat specimen) |
Chemical Requirements for ASTM A387 Grade 22 Alloy Steel Plates
| Element | Chemical Composition (%) | |
| A387 Grade 22 | ||
| Carbon: | Heat Analysis: | 0.05 - 0.15 |
| Product Analysis: | 0.04 - 0.15 | |
| Manganese: | Heat Analysis: | 0.30 - 0.60 |
| Product Analysis: | 0.25 - 0.66 | |
| Phosphorus: | Heat Analysis: | 0.035 |
| Product Analysis: | 0.035 | |
| Sulphur (max): | Heat Analysis: | 0.035 |
| Product Analysis: | 0.035 | |
| Silicon: | Heat Analysis: | 0.50 max |
| Product Analysis: | 0.50 max | |
| Chromium: | Heat Analysis: | 2.00 - 2.50 |
| Product Analysis: | 1.88 - 2.62 | |
| Molybdenum: | Heat Analysis: | 0.90 - 1.10 |
| Product Analysis: | 0.85 - 1.15 |
applications
Oil & Gas Industry
It is widely used in the entire oil & gas industry chain. In refineries, it fabricates hydrotreating/hydrocracking reactors and desulfurization units, resisting hydrogen sulfide corrosion and high pressure in sour crude processing. It also suits sour gas handling equipment, pipelines and pressure vessels in gas extraction, as well as downstream distillation pipelines and storage tanks.
Power Industry
It is a core material for thermal power boiler systems, including drums, headers and high-temperature steam pipelines, enduring over 500°C and pressure fluctuations. It applies to nuclear power auxiliary system pressure components and combined-cycle power plant turbine casings, ensuring operational safety.
Chemical & Coal Chemical Industry
It is ideal for high-temperature corrosive equipment, such as polymerization and alkylation reactors, and acid/alkali transportation pipelines. In coal chemical industry, it is used in synthesis towers and gasification furnace components, and also serves as heat exchanger shells and tube sheets.
General Industrial Boilers & Heat Exchangers
It is applied to industrial boiler pressure components, resisting thermal fatigue and corrosion. For heavy-duty heat exchangers in pharmaceuticals, metallurgy and food industries, it makes core parts, ensuring stable heat transfer efficiency and equipment reliability.
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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.
What is the ASTM A387 equivalent to?
Among the ASTM A387 Grade 22 equivalent steel grades, SA387 Grade 22, 10CrMo9-10 is more popular than other equivalents. SA387 Grade 22 steel is under ASME SA387/ SA387M standard. The chemical performance and technical requirements of SA387 Grade 22 steel is almost same with ASTM A387 Grade 22 steel.