SA 387 Grade 11 CLASS 2 is a pressure vessel grade steel for use in elevated temperature service, ASME SA387 Grade 11Class 2 is used in a variety of industries and is highly effective, particulanly in the oil, gas and petrochemical industry, where liquidand gases are often stored at higher temperatures.
Chemical Composition
| Element | Chemical Composition (%) | |
| SA387 Grade 11 | ||
| Carbon: | Heat Analysis: | 0.05 - 0.17 |
| Product Analysis: | 0.04 - 0.17 | |
| Manganese: | Heat Analysis: | 0.40 - 0.65 |
| Product Analysis: | 0.35 - 0.73 | |
| Phosphorus: | Heat Analysis: | 0.035 |
| Product Analysis: | 0.035 | |
| Sulphur (max): | Heat Analysis: | 0.035 |
| Product Analysis: | 0.035 | |
| Silicon: | Heat Analysis: | 0.50 - 0.80 |
| Product Analysis: | 0.44 - 0.86 | |
| Chromium: | Heat Analysis: | 1.00 - 1.50 |
| Product Analysis: | 0.94 - 1.56 | |
| Molybdenum: | Heat Analysis: | 0.45 - 0.65 |
| Product Analysis: | 0.45 - 0.70 |
Applications of SA 387 Gr. 11 Cl. 2
Pressure vessels in the oil and gas industry: Specifically employed in upstream, midstream, and downstream sectors, such as vessels for sour gas (H₂S) processing, high-temperature hydrocarbon storage, and hydrogenation units, thanks to its excellent corrosion and stress cracking resistance.
Boilers: Used for fabricating key components of industrial boilers and power plant boilers, including superheater headers and reheater assemblies, to withstand continuous high-temperature flue gases and steam pressure.
Heat exchangers: Ideal for manufacturing heat exchangers in chemical, petrochemical, and power generation facilities, as it can endure cyclic thermal stress and oxidation during heat transfer processes.
Pipelines and other high-temperature equipment: Applied in onshore and offshore high-temperature pipelines that transport hot process fluids, as well as supporting equipment for thermal processing systems, ensuring structural stability under long-term high-temperature service.
Flanges: Used to produce heavy-duty flanges for high-temperature and high-pressure pipelines, providing reliable sealing performance and mechanical strength to prevent leakage at connection points.
High-temperature ducting: Utilized in industrial ductwork that conveys high-temperature flue gases or process air, resisting thermal deformation and oxidation in harsh thermal environments.
Pipe clamps: Manufactured into high-strength pipe clamps for securing high-temperature pipelines, maintaining pipeline alignment while withstanding the thermal expansion and contraction of the system.
Valves: Employed in the production of valve bodies and internal components for high-temperature pressure systems, ensuring wear resistance, corrosion resistance, and reliable switching performance under extreme conditions.
Full specification and details are available on request. The above information is provided for guidance purposes only. For specific design requirements please contact our technical sales staff.
1.What is the price of SA 387 Grade 11 Class 2?
The price of SA 387 Grade 11 Class 2 steel plate varies significantly by supplier, quantity, dimensions (thickness, size), and market conditions, but expect pricing generally in the range of $1,000 to over $3,000 per ton, with some individual pieces priced from around $150 to several hundred dollars, often quoted FOB (Freight On Board) or per kilogram in local currency.
2.What temperature is SA 387 GR 11?
In the lower end of the temperature range SA 387 Gr 11 (1150 °F min tempering temperature) , and SA 387 Gr 22 (1250 °F min tempering temperature) are used. These grades can be specified in either class 1 or 2 and can also be provided in the Normalized & Tempered or Quenched and Tempered.