I. Overview of SA387Gr91CL2 Steel Plate
SA387Gr91CL2 is an alloy steel belonging to the chromium-molybdenum steel series under the ASTM A387 standard. Its main components include chromium (Cr) and molybdenum (Mo); these two elements endow the steel plate with excellent high-temperature resistance and oxidation resistance. In addition, this material also has good weldability and mechanical strength, making it an indispensable engineering material in high-temperature and high-pressure environments.
II. Chemical Composition
The chemical composition of SA387Gr91CL2 pressure vessel plate strictly complies with the ASTM A387 standard.
The following is its typical chemical composition range (Unit: %):
| Element | Content Range |
|---|---|
| Carbon (C) | 0.08 - 0.15 |
| Silicon (Si) | ≤0.50 |
| Manganese (Mn) | 0.30 - 0.60 |
| Phosphorus (P) | ≤0.025 |
| Sulfur (S) | ≤0.025 |
| Chromium (Cr) | 8.00 - 9.50 |
| Molybdenum (Mo) | 0.85 - 1.05 |
The reasonable proportion of these elements ensures that the steel plate has excellent mechanical properties and corrosion resistance under high-temperature conditions.
III. Mechanical Properties
The mechanical properties of SA387Gr91CL2 boiler plate are one of its core advantages. The following are its typical mechanical property indicators:
| Mechanical Property Indicator | Value Range |
|---|---|
| Tensile Strength (MPa) | ≥585 |
| Yield Strength (MPa) | ≥415 |
| Elongation (%) | ≥20 |
| Impact Toughness (J) | ≥41 (at room temperature) |
| Hardness (HB) | ≤220 |
These properties enable SA387Gr91CL2 steel plate to maintain stability under extreme working conditions, especially performing excellently in high-temperature and high-pressure environments.
IV. Heat Treatment Process
To give full play to the performance of SA387Gr91CL2 boiler plate, a heat treatment process of Normalizing + Tempering is usually required. The specific steps are as follows:
- Normalizing: Heat the steel plate to 950℃~1000℃, hold it at this temperature for a certain period, and then cool it in air. This step refines the grain structure and improves the material uniformity.
- Tempering: Heat the normalized steel plate to 700℃~750℃, hold it at this temperature, and then cool it slowly. This process eliminates internal stresses and further optimizes the mechanical properties.
Through the above heat treatment process, the creep resistance and long-term service stability of the steel plate can be significantly improved.
V. Application Fields
Due to its outstanding high-temperature performance and corrosion resistance, SA387Gr91CL2 steel plate is widely used in the following fields:
Power Industry: Used in the manufacturing of pipes, headers, and steam pipelines for supercritical and ultra-supercritical boilers.
Petrochemical Industry: Suitable for high-temperature and high-pressure reactors and heat exchangers in oil refineries and chemical plants.
Nuclear Power Field: Serves as the material for pressure-bearing components in the auxiliary systems of nuclear reactors.
Other Industries: Applied in scenarios with high material performance requirements, such as aerospace and shipbuilding.
VI. Precautions and Maintenance
Welding Process: For the welding of SA387Gr91CL2 pressure vessel plate, low-hydrogen electrodes must be used. The preheating temperature (generally 150℃~200℃) and interpass temperature should be strictly controlled to avoid welding cracks.
Regular Inspection: Equipment used for a long time in high-temperature and high-pressure environments should undergo regular nondestructive testing (such as ultrasonic testing and radiographic testing) to ensure the safety of the steel plate.
Anti-Corrosion Measures: Although this material has a certain degree of corrosion resistance, additional anti-corrosion measures (such as coating protection or cathodic protection) are still required in some special media.
VII. Summary
SA387Gr91CL2 hot-rolled plate occupies an important position in the industrial field due to its excellent high-temperature performance, creep resistance, and mechanical strength. Through rational chemical composition design, strict heat treatment processes, and scientific application and maintenance, this material can meet the requirements of various complex working conditions. If you are looking for a high-quality steel plate suitable for high-temperature and high-pressure environments, SA387Gr91CL2 is undoubtedly a reliable choice.
We hope this article is helpful to you! If you have more questions about SA387Gr91CL2 steel plate or other materials, please feel free to consult us at any time.
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FAQ
Q: What is SA 387 material?
A: A high quality chrome molybdenum alloy steel plate intended specifically for use in weldable carbon steel pressure vessels at elevated temperatures. Added molybdenum gives the material greater temperature tensile strength and the chromium provides improved corrosion resistance.
Q: What is SA387 grade 11 equivalent to?
A: Sa 387 Gr 11 Equivalent Material is the ASME SA387 in the US markets with the European Union having modules in 13CrMoSi5-5 grade. The Sa 387 Gr 11 Cl 2 Equivalent Material is the SA387-11-2 of the ASME and ASTM standard.
Q: What is the difference between SA387 Grade 11 Class 1 and Class 2?
A: The difference between SA 387 Grade 11 Class 1 and Class 2 Plate lies in their mechanical properties. However, they both have the same chemical composition. The tensile strength and yield strength of class 2 material is higher than that of class 1, whereas the elongation for class 1 is higher compared to class 2.
Q: What is the temperature range for SA 387 GR 11?
A: 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.
Q: What is SA 387 GR 9 material?
A: SA 387 GR 9 is a chromium-molybdenum alloy steel widely used in high-temperature applications such as pressure vessels and power generation equipment and it provides excellent resistance to oxidation and creep, making it ideal for long-term service at elevated temperatures.
Q: What is the chemical composition of SA 387 GR 22?
A: 22 CL. 2 plate chemical composition includes Chromium (Cr) 2%, Molybdenum (Mo) 1%, Manganese (Mn) 0.5%, Silicon (Si) 0.5%, Phosphorus (P) 0.03%, Sulfur (S) 0.03%, and Carbon (C) 0.1%.
Q: What is the equivalent material of SA 387 GR 12?
A: Sa 387 Gr 12 Equivalent Material can be classified as Asme SA 387 for the USA, for the European Union, the equivalent grade to this material is EN 13CrMo4-5. In Germany and England, the equivalent grades are DIN 13CRM044 and BS 620B, respectively. Apart from this, the equivalent grade for France is AFNOR 36206 15CD2.
Q: What is a A387 Grade 5 equivalent to?
A: Other Designations. Other designations that are equivalent to AISI A387 grade 5-PVQ alloy steel include the following: ASME SA387 (5) ASTM A314 (502)
Q: What is SA 387 GR 5 material?
A: chrome molybdenum alloy steel plate
SA387 GR 5 CLASS 2
A high quality chrome molybdenum alloy steel plate intended specifically for use in weldable carbon steel pressure vessels at elevated temperatures. Added molybdenum gives the material greater temperature tensile strength and the chromium provides improved corrosion resistance.
In addition to A387/SA387, we offer a wider selection of steel plates listed in the table below that meet practical requirements: high-strength low-alloy plates for heavy machinery, wear-resistant plates for material erosion resistance, weather-resistant plates for complex climates, and marine plates that comply with ship classification standards. If you have specific needs, feel free to contact us, and we'll provide professional recommendations.
Email: info@gneesteels.com
| Other steel plate | ||||
| Name | Material | Specification (mm) | Tons | Remark |
| Low Alloy | Q345A, Q345B, Q345C, Q345D, Q345E, Q390, Q420, Q460C, ST52-3, S355J2+N, SS400, SA302GrC, S275NL, 35CrMo | 6 - 350 | 5788.56 | Normalizing, tempered ,controlled rolling, hot rolling , Hot rolling,1st inspection, 2nd inspection, 3rd inspection |
| Pressure Vessel Plate | Q245R, Q345R, Q370R, 16MnDR, 09MnNiDR, 15CrMoR, 14Cr1MoR, 12Cr2Mo1R, SA516Gr60, SA516Gr70, SA516Gr485, SA285, SA387Gr11, SA387Gr12, SA387Gr22, P265,P295,P355GH,Q245R(R-HIC),Q345R(R-HIC) | 3 - 300 | 8650 | Normalizing, tempered ,controlled rolling, hot rolling , Hot rolling,1st inspection, 2nd inspection, 3rd inspection |
| High-Strength Plate | WH785D/E,Q960D/E, Q890D/E,WH60D/E,WH70B,Q550D,Q590D,Q690D/E | 8 - 120 | 3086.352 | Quenched and tempered |
| Wear-Resistant Plate | NM360, NM400, NM450, NM500 | 6 - 150 | 3866.297 | Quenched and tempered |
| Bridge Plate | Q235qC, Q345qC, Q370qC, Q420qC, Q345qDNH, Q370qDNH, A709 - 50F - 2, A709 - 50T - 2 | 8 - 200 | 2853.621 | Hot rolling, normalized ,hot rolling controlled rolling, quenched and tempered + toughness and brittleness |
