ASTM A387 Grade 11 Class 2 is a chromium - molybdenum alloy steel plate that meets the ASTM A387/A387M standard, specially developed for high-temperature and high-pressure pressure-bearing equipment. It is widely used in harsh working conditions in the petrochemical and power industries due to its excellent performance.
Chemical Requirements for ASTM A387 Grade 11 Alloy Steel Plates
| Element | Chemical Composition (%) | |
| A387 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 |
Mechanical Property
|
Grade |
A387 Gr.11 CL.2 Mechanical Property |
|||
|
|
Thickness |
Yield |
Tensile |
Elongation |
|
A387 Gr.11 Cl.2 |
mm |
Min Mpa |
Mpa |
Min % |
|
|
t≦50 |
310 |
515-690 |
18 |
|
50<t≦200 |
- |
- |
- |
|
Applications
Boilers & Pressure Vessels: Ideal for constructing welded vessels and boilers operating at elevated temperatures.
Oil & Gas Industry: Used in equipment for sour gas (H2S) environments due to superior corrosion resistance.
Power Generation: Found in components within power plants, including nuclear facilities.
Heat Exchangers & Pipework: Suitable for heat exchangers and pipes transporting hot liquids and gases.
Chemical Processing: Utilized in equipment handling corrosive chemicals at high temperatures.
Advantages
High-Temperature Strength: Retains mechanical strength at high working temperatures.
Excellent Corrosion Resistance: Offers superior resistance to oxidation and corrosion, crucial for harsh environments.
Good Weldability: Easily welded, facilitating fabrication into complex components.
Enhanced Mechanical Properties: Class 2 offers higher yield and tensile strength compared to Class 1.
Durability: Provides excellent durability, longevity, and toughness, performing well under stress.
Versatility: Performs well in both high and low-temperature conditions.
If you have project requirements for A387 Grade 11 CL 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.
What is ASTM A387 Grade 11 Class 2?
It is a chromium-molybdenum alloy steel plate specified by ASTM A387/A387M, designed for high-temperature, high-pressure pressure-bearing equipment, with excellent resistance to hydrogen corrosion, sulfide stress cracking and creep deformation.
What heat treatment is required for A387 Grade 11 CL 2?
It is supplied after normalizing + tempering (or normalizing + rapid cooling + tempering), with a minimum tempering temperature of 620°C, to enhance its mechanical strength and toughness.