Introduction: When Industrial Equipment Faces High Temperature and Pressure, Who Safeguards Safety?
In extreme working conditions such as petroleum refining, thermal power generation, and nuclear energy, the performance of equipment materials directly affects production safety and economic benefits. Traditional steel tends to soften, corrode, or even crack under high temperatures. The emergence of SA387Gr91CL2 steel plate-featuring "high-temperature resistance, anti-creep capability, and strong toughness"-has become the "ultimate line of defense" in the industrial sector. This article will decode the "genetic makeup" of this material and reveal why it has become the preferred choice of engineers worldwide.
SA387Gr91CL2 Steel Plate: From Chemical Composition to Performance Breakthrough
Material "Genetic" Analysis
SA387Gr91CL2 hot-rolled plate is a chromium-molybdenum alloy steel under the ASTM standard. Its core chemical components include:
- Chromium (Cr) (8.0%–9.5%): Enhances oxidation and corrosion resistance, defending against acidic media.
- Molybdenum (Mo) (0.85%–1.05%): Improves high-temperature strength and suppresses creep deformation during long-term exposure to heat.
- Vanadium (V) and Niobium (Nb): Strengthen the material through carbide/nitride precipitation, significantly increasing tensile strength and toughness.
Key performance indicators
- Applicable temperature range: –29 °C to 600 °C
- Tensile strength ≥ 585 MPa, yield strength ≥ 415 MPa
- Impact energy (–20 °C) ≥ 27 J, ensuring reliability in low-temperature environments
Performance Advantages in Comparison
Compared with conventional steel (e.g., Q345R), SA387Gr91CL2 pressure vessel plate offers three core advantages:
- 40 % higher high-temperature strength: Maintains strong mechanical properties at 600 °C, preventing deformation or failure.
- 5× longer creep life: Under prolonged high-temperature service, its deformation is only one-fifth that of ordinary steel.
- Excellent weldability: Requires only low preheat temperatures (200 °C–250 °C) and no complex post-weld heat treatment, lowering fabrication costs.
Application Scenarios of SA387Gr91CL2 Steel Plate: From Laboratory to Industrial Field
"Heart Components" in the Petrochemical Sector
- Hydrogenation reactors: In high-temperature (550 °C), high-pressure (20 MPa), and hydrogen-corrosive environments, reactors lined with SA387Gr91CL2 hot-rolled plate can operate stably for over 10 years.
- Coking units: Resist sulfide stress corrosion cracking (SSCC), minimizing unplanned shutdown losses.
The "Energy Cornerstone" in the Power Industry
- Ultra-supercritical boilers: Used to manufacture superheater and reheater tubes that endure 620 °C steam, helping power plants exceed 45 % thermal efficiency.
- Nuclear power equipment: Applied in main steam pipelines of the nuclear island, its resistance to neutron irradiation embrittlement ensures safe operation of nuclear plants.
Potential Applications in Emerging Fields
- Hydrogen energy storage and transport: Capable of withstanding the extreme low temperature of liquid hydrogen (–253 °C) and high-pressure hydrogen embrittlement, making it a key material in the hydrogen energy supply chain.
- Aerospace: Used in rocket engine combustion chamber casings to withstand the impact of transient ultra-high-temperature gases.
key points to avoid pitfalls
Three key points to avoid pitfalls when sourcing
- Verify ASTM/ASME certification to avoid "non-standard re-rolled" products.
- Request third-party inspection reports (e.g., SGS) from suppliers.
- Prioritize manufacturers with custom heat-treatment capabilities to meet special working conditions.
Future Outlook: SA387Gr91CL2 in the New-Material Revolution
With the development of "intelligent thermal-processing technology" and "nano-reinforced coatings," SA387Gr91CL2 is expected to achieve:
- Service temperature exceeding 650 °C, meeting the needs of next-generation ultra-supercritical units
- 30 % longer life cycle, reducing maintenance costs through surface modification technologies
- Green manufacturing: Raising scrap-steel recycling rates to 95 %, lowering the carbon footprint
Conclusion: Choosing the Right Material Is Choosing Competitiveness
SA387Gr91CL2 pressure vessel plate is not only the "armor" of industrial equipment but also an "invisible engine" for cost reduction and efficiency enhancement. Under extreme working conditions, every performance breakthrough means lower failure rates and higher production output. If you are looking for a material that stands the test of time, SA387Gr91CL2 will be your best partner in technological upgrading.
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.
Our product matrix goes beyond A387/SA387, including the various steel plates shown in the table below: high-strength low-alloy plates for a balance of strength and toughness, wear-resistant plates for high wear conditions, weather-resistant plates for aging and corrosion resistance, and marine plates designed for ship structures. If you're interested in any particular type, feel free to reach out for consultation.
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 |
