ASTM A387 Grade 11 Class 2 is a high-strength, chrome-moly alloy steel plate designed for high-temperature pressure vessels, offering enhanced mechanical properties (higher strength) and better creep/corrosion resistance due to its chromium/molybdenum content, suitable for demanding environments like oil, gas, and chemical processing.
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A387 Gr.11 CL.2Chemical Composition |
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Grade |
The Element Max (%) |
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C |
Si |
Mn |
P |
S |
Cr |
Mo |
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A387 Gr.11 Cl.2 |
0.04-0.17 |
0.44-0.86 |
0.35-0.73 |
0.035 |
0.035 |
0.94-1.56 |
0.40-0.70 |
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Grade |
A387 Gr.11 CL.2Mechanical Property |
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Thickness |
Yield |
Tensile |
Elongation |
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A387 Gr.11 Cl.2 |
mm |
Min Mpa |
Mpa |
Min % |
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t≦50 |
310 |
515-690 |
18 |
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50<t≦200 |
- |
- |
- |
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Equivalent steel grade of A387 Gr.11 Cl.2 |
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Europe |
Belgium |
Germany |
France |
Italy |
Sweden |
India |
Japan |
U.K |
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621 gr. A,B |
Applications
Oil & Gas: Hydrotreating reactors, high-temperature storage vessels, sour gas service equipment, and piping systems.
Petrochemical & Refining: Pressure vessels, heat exchangers, and other components in demanding process environments.
Power Generation: Boilers and components operating under sustained high temperatures and pressures.
Chemical Processing: Equipment requiring corrosion resistance at elevated temperatures.
If you have project requirements for ASTM A387 Grade 11 Class 2 , we welcome your inquiry. GNEE maintains a large inventory of commonly used high strength steel grades for your selection.For detailed mechanical properties, chemical composition, and technical data, as well as free samples, please contact our factory immediately. We offer competitive prices, stable quality, and professional service. Email:beam@gneesteelgroup.com.
1.What temperature is a387 grade 11 class 2?
ASTM A387 Grade 11 Class 2 is a chromium-molybdenum steel designed for high-temperature pressure vessels, commonly used in the 350°C to 480°C (660°F to 900°F) range, with a mandatory minimum tempering temperature of 620°C (1150°F) after heat treatment to achieve its Class 2 mechanical properties, offering excellent strength and corrosion resistance in elevated-temperature service like reactors and heat exchangers.
2.What is A387 grade 11 material?
The ASTM A387 specification is the Standard Specification for Pressure Vessel Plates, Alloy Steel, Chromium-Molybdenum intended primarily for use in welded boilers and pressure vessels designed for elevated temperature service. SSAB can supply A387 Grade 11 to the tension test requirements for Class 1 and/or Class 2.
3.How strong is a387 grade 11 class 2?
ASTM A387 Grade 11 Class 2 is a strong chromium-molybdenum alloy steel for high-temperature pressure vessels, offering a tensile strength of 75-100 ksi (515-690 MPa) and a minimum yield strength of 43 ksi (310 MPa), making it stronger and suitable for more demanding conditions than Class 1 due to enhanced heat treatment.