In the field of steel materials, SA387Gr91CL2 hot-rolled plate and 15CrMoR steel plates are two important materials with distinct characteristics and wide applications. Although both perform well in high-temperature and high-pressure environments, they differ significantly in chemical composition, performance characteristics, application fields, and manufacturing processes.
Differences in Chemical Composition
| Chemical Composition | SA387Gr91CL2 Content Range (%) | 15CrMoR Content Range (%) |
|---|---|---|
| Carbon (C) | 0.08 - 0.15 | 0.12 - 0.18 |
| Silicon (Si) | 0.20-0.50 | 0.15～0.40 |
| Manganese (Mn) | 0.30-0.60 | 0.40～0.70 |
| Phosphorus (P) | 0.020 | ≤0.025 |
| Sulfur (S) | 0.010 | ≤0.010 |
| Chromium (Cr) | 8.00 - 9.50 | 0.80 - 1.20 |
| Molybdenum (Mo) | 0.85 - 1.05 | 0.45 - 0.60 |
| Niobium (Nb) | 0.06-0.10 | / |
Comparison of Performance Characteristics
SA387Gr91CL2 hot-rolled plate is known for its outstanding heat resistance, pressure-bearing capacity, and corrosion resistance. It can maintain high strength and rigidity at temperatures up to 600°C while withstanding the pressures of high-pressure vessels and boilers. In addition, this steel plate has good creep resistance and oxidation resistance, maintaining stable mechanical properties at high temperatures.
By comparison, 15CrMoR pressure vessel plate also exhibits excellent heat resistance, especially below 550°C, with high long-term strength. It also has good toughness and plasticity, is easy to process and form, and possesses decent corrosion resistance.
Differences in Application Fields
Due to differences in performance, SA387Gr91CL2 and 15CrMoR hot-rolled plates are used in different application areas. SA387Gr91CL2 is widely used in critical equipment in the petroleum, chemical, and power industries, such as boilers, turbines, generators, nuclear heat exchangers, and furnace tubes for petroleum cracking units, thanks to its excellent heat and pressure resistance.
15CrMoR steel plate, with its balanced performance, is widely used in the manufacturing of pressure vessels and boilers, including petrochemical machinery, petroleum equipment, environmental protection equipment, and liquefied gas tanks.
Manufacturing Process and Delivery Condition
In terms of manufacturing, both steel plates undergo strict processes including steelmaking, rolling, and heat treatment. However, the heat treatment process for SA387Gr91CL2 is relatively complex, typically involving normalizing followed by tempering, with normalizing temperatures of 1040–1080°C and tempering at 730–790°C. This process helps improve its strength and toughness.
For 15CrMoR pressure vessel plate, normalizing and tempering are also commonly used to ensure good mechanical properties and heat resistance.
Regarding delivery condition, SA387Gr91CL2 is usually supplied in the normalized and tempered condition to ensure superior mechanical properties. 15CrMoR steel plate can be supplied either normalized or normalized and tempered according to customer requirements. Additionally, both steel plates can undergo Z-grade performance treatment (such as Z15, Z25, Z35) to meet specific engineering requirements.
Conclusion
In summary, SA387Gr91CL2 and 15CrMoR pressure vessel plates show significant differences in chemical composition, performance characteristics, application fields, and manufacturing processes.
SA387Gr91CL2, with excellent heat and pressure resistance and corrosion resistance, performs well in high-temperature and high-pressure environments and is widely used in critical equipment in the petroleum, chemical, and power industries.
15CrMoR steel plate, with its balanced performance, plays an important role in the manufacturing of pressure vessels and boilers. When selecting materials, it is necessary to consider the specific application environment and requirements, as well as the material's performance characteristics and cost-effectiveness, to make the most suitable choice.
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 and 15CrMoR steel plates, we offer various types of steel plates as shown in the table below, including high-strength low-alloy plates, wear-resistant plates, weather-resistant plates, and marine plates. If you're interested in any of these, feel free to get in touch with us.
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 |
