In the field of high-temperature and high-pressure equipment manufacturing, SA387Gr91CL2 (referred to as P91 for short) steel is emerging as a star material in the global industrial market. This article will provide professional decision-making references for engineering procurers from four dimensions: technical parameters, industrial applications, 2024 market trends, and procurement strategies.
Core Technical Characteristics of SA387Gr91CL2/P91
As a chromium-molybdenum alloy steel plate under the ASME standard, SA387Gr91CL2 has become a core material for energy equipment due to its unique properties:
- High-Temperature Strength: Maintains a creep rupture strength of ≥60MPa even in an environment of 593℃.
- Oxidation Resistance: A stable oxide film is formed with a chromium content of 9%, and its corrosion resistance is 300% higher than that of P22 steel.
- Welding Innovation: Adopts the RPVE welding process, with the hardness of the heat-affected zone (HAZ) ≤250HV.
- Cost Advantage: Compared with similar materials, it can reduce weight by 40%, and lower equipment construction costs by 15-20%.
Solutions to Pain Points in Industrial Applications
Professional suggestions for common engineering issues:
- Crack Prevention: Control the tempering temperature at 730-780℃, with a holding time of ≥2 hours per inch of thickness.
- Supplier Screening: Must verify the EN10204 3.2 material certificate; it is recommended to require a third-party SGS inspection report.
- Inventory Management: Adopt the Just-In-Time (JIT) procurement model and establish a strategic supplier database (it is recommended to retain more than 3 certified suppliers).
Procurement Decision Matrix
| Evaluation Dimension | Characteristics of High-Quality Suppliers | Risk Warning Signs |
|---|---|---|
| Quality Certification | Provide a real-time online material traceability system | Only provide copy certificates |
| Delivery Capability | Regular inventory ≥500 tons | Delivery lead time exceeding 60 days |
| Technical Services | Equipped with a team of metallurgical engineers | No on-site technical support commitment |
Forward-Looking Industry Trends
With the implementation of the new ASME BPVC 2023 edition, it is recommended to pay attention to the following upgrading directions of P91 materials:
Improved SA387Gr91CL2 for supercritical units (with 18% higher creep resistance).
Clad plate technology (base layer: P91 + corrosion-resistant alloy cladding layer).
Digital quality management system (application of blockchain traceability technology)
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.
Beyond A387/SA387, we have a diverse range of steel plates, as shown in the table below: high-strength low-alloy plates for equipment lightweighting, wear-resistant plates to reduce maintenance costs, weather-resistant plates to extend outdoor component lifespans, and marine plates for ensuring ship safety. If you're interested in any of these steel plate types, we are happy to discuss your needs with you.
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 |
