When it comes to steel plates, there are countless different varieties and grades out there. The most sought-after type of steel plate is SA 387 Gr 11. This specialized grade of steel offers superior mechanical properties, making it a great choice for applications that require extra strength and durability.
In this article, we'll take an in-depth look at how SA 387 Gr 11 Plates compare against other types of steel plates so that you can determine which type best suits your needs.
We'll review all the important qualities like strength-to-weight ratio, finish options, formability and more! Get ready to dive into the world of metal fabrication with a side-by-side comparison between SA 387 Gr 11 Plates and other types of steel plates!
What is SA 387 Gr 11 Plates?

SA 387 Gr 11 Plates are chromium molybdenum alloy steel plates primarily used in pressure vessels, heat exchangers and boilers at high temperatures. They are made of chromium-molybdenum alloy with an added amount of carbon, which increases their strength and provides outstanding corrosion resistance properties. Despite extreme working conditions, these stainless steel plates offer excellent oxidation and corrosion resistance due to their superb tensile strength and low-temperature toughness. In addition, they have superior creep characteristics making them the ideal choice for various engineering projects where weight savings is critical.
What are Steel Plates?
Steel plates are large pieces of metal, typically in flat shapes with squared corners and sides, used in various applications across many industries. Generally made from iron or steel alloy that is heated and hammered into shape, steel plates provide strength and durability for structures such as bridges, ships, buildings, vehicles, railroads, industrial machinery and equipment frames. Steel plates are also found in everyday products such as kitchen appliances and furniture components. Their heat-resistant qualities make them ideal for fabricating cookware.
Different Between SA 387 Gr 11 Plates and Other Types of Steel Plates
SA 387 Gr 11 plates are a chromium-molybdenum alloy steel type ideal for use in high-temperature environments. These plates have excellent corrosion and oxidation resistance, making them a popular choice for various industries such as chemical, petrochemical, and power generation. SA 387 Gr 11 plates also have good tensile and yield strength, making them suitable for high-temperature services such as boiler applications.
Compared to SA 387 Gr 11 plates, carbon steel plates are popular due to their affordability and wide availability. However, carbon steel plates are not recommended for high-temperature environments due to their low thermal conductivity. Carbon steel plates also have poor corrosion resistance, making them unsuitable for harsh environments. On the other hand, stainless steel plates have excellent corrosion resistance but lack the strength for high-temperature applications.
In contrast, SA 516 Gr 70 plates are another steel plate often used in boiler applications. While SA 516 Gr 70 plates have good tensile strength, they do not possess the same corrosion and oxidation resistance level as SA 387 Gr 11 plates. SA 516 Gr 70 plates are also susceptible to brittle fracture at low temperatures, making them unsuitable for cryogenic applications.
Overall, SA 387 Gr 11 plates offer a unique combination of strength and resistance to high-temperature and harsh environments. Compared to carbon steel plates, SA 387 Gr 11 plates offer superior corrosion and oxidation resistance while maintaining good tensile and yield strength. Compared to SA 516 Gr 70 plates, SA 387 Gr 11 plates have better resistance to oxidation and corrosion, making them a better choice for high-temperature environments.
Conclusion
In conclusion, when selecting the right type of steel plate for your project, it's crucial to consider factors such as the application, environment, and temperature requirements. SA 387 Gr 11 plates offer excellent resistance to high-temperature and harsh environments, making them ideal for various industrial applications. Compared to other types of steel plates, SA 387 Gr 11 plates offer superior corrosion and oxidation resistance while maintaining good tensile and yield strength, making them a reliable and cost-effective choice for your next project.
If you want to learn more about GNEE's products, you can send an email to alloy@gneesteelgroup.com. We are more than happy to assist you.
FAQ
Q: What is A387 Grade 11 material?
A: The ASTM A387 specification is the Standard Specification for Pressure Vessel Plates, Alloy Steel, Chromium-Molybdenum intended primarily for use in welded boilers and pressure vessels designed for elevated temperature service.
Q: What is SA 387 GR 11 Cl 1 equivalent material?
A: Sa 387 Gr 11 Equivalent Material
With similar chromium, molybdenum, and chemical content the, Sa 387 Gr 11 Cl 1 Equivalent Material of the BS 621B exhibits identical properties.
Q: What temperature is 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 the difference between SA 387 GR 11 cl1 and cl2?
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 SA 387 Grade 11 material?
A: Composition: ASME SA387 Grade 11 typically contains about 1% chromium and 0.5% molybdenum. This composition provides good strength and resistance to oxidation at high temperatures. Mechanical Properties: Yield Strength: Minimum of 205 MPa (30,000 psi)
Q: What is the difference between SA 387 Grade 11 CL 1 and Class 2?
A: The Chemical Composition remains the same in both Class 1 and Class 2 (Cl1 and Cl2) but the only Difference is in the Mechanical Properties which is mentioned in below Table.
Q: What is SA 387 Grade 11 Class 2 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 temperature is 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 the chemical composition of ASTM A387 Grade 11 Class 2?
A: ASTM A387 GR 11 CL 2 Plates is designed with the composition of chemicals such as carbon, silicon, phosphorous, chromium, sulfur, molybdenum, and manganese. Alloy ASTM A387 is made with specifications such as different standards, finishing, hardness, form, width, and thickness.
Q: What is the difference between SA 516 GR 70 and SA 387 GR 11?
A: Compared to carbon steel plates, SA 387 Gr 11 plates offer superior corrosion and oxidation resistance while maintaining good tensile and yield strength. Compared to SA 516 Gr 70 plates, SA 387 Gr 11 plates have better resistance to oxidation and corrosion, making them a better choice for high-temperature environments.
| Grades Of Pressure Vessel Plates Supplied By GNEE | |||||
| ASTM | ASTM A202/A202M | ASTM A202 Grade A | ASTM A202 Grade B | ||
| ASTM A203/A203M | ASTM A203 Grade A | ASTM A203 Grade B | ASTM A203 Grade D | ASTM A203 Grade E | |
| ASTM A203 Grade F | |||||
| ASTM A204/A204M | ASTM A204 Grade A | ASTM A204 Grade B | ASTM A204 Grade C | ||
| ASTM A285/A285M | ASTM A285 Grade A | ASTM A285 Grade B | ASTM A285 Grade C | ||
| ASTM A299/A299M | ASTM A299 Grade A | ASTM A299 Grade B | |||
| ASTM A302/A302M | ASTM A302 Grade A | ASTM A302 Grade B | ASTM A302 Grade C | ASTM A302 Grade D | |
| ASTM A387/A387M | ASTM A387 Grade 5 Class1 | ASTM A387 Grade 5 Class2 | ASTM A387 Grade 11 Class1 | ASTM A387 Grade 11 Class2 | |
| ASTM A387 Grade 12 Class1 | ASTM A387 Grade 12 Class2 | ASTM A387 Grade 22 Class1 | ASTM A387 Grade 22 Class2 | ||
| ASTM A515/A515M | ASTM A515 Grade 60 | ASTM A515 Grade 65 | ASTM A515 Grade 70 | ||
| ASTM A516/A516M | ASTM A516 Grade 55 | ASTM A516 Grade 60 | ASTM A516 Grade 65 | ASTM A516 Grade 70 | |
| ASTM A517/A517M | ASTM A517 Grade A | ASTM A517 Grade B | ASTM A517 Grade E | ASTM A517 Grade F | |
| ASTM A517 Grade P | ASTM A517 Grade J | ||||
| ASTM A533/A533M | ASTM A533 Grade A Class1 | ASTM A533 Grade B Class1 | ASTM A533 Grade C Class1 | ASTM A533 Grade D Class1 | |
| ASTM A533 Grade A Class2 | ASTM A533 Grade B Class2 | ASTM A533 Grade C Class2 | ASTM A533 Grade D Class2 | ||
| ASTM A533 Grade A Class3 | ASTM A533 Grade B Class3 | ASTM A533 Grade C Class3 | ASTM A533 Grade D Class3 | ||
| ASTM A537/A537M | ASTM A537 Class1 | ASTM A537 Class2 | ASTM A537 Class3 | ||
| ASTM A612/A612M | ASTM A612 | ||||
| ASTM A662/A662M | ASTM A662 Grade A | ASTM A662 Grade B | ASTM A662 Grade C | ||
| EN | EN10028-2 | EN10028-2 P235GH | EN10028-2 P265GH | EN10028-2 P295GH | EN10028-2 P355GH |
| EN10028-2 16MO3 | |||||
| EN10028-3 | EN10028-3 P275N | EN10028-3 P275NH | EN10028-3 P275NL1 | EN10028-3 P275NL2 | |
| EN10028-3 P355N | EN10028-3 P355NH | EN10028-3 P355NL1 | EN10028-3 P355NL2 | ||
| EN10028-3 P460N | EN10028-3 P460NH | EN10028-3 P460NL1 | EN10028-3 P460NL2 | ||
| EN10028-5 | EN10028-5 P355M | EN10028-5 P355ML1 | EN10028-5 P355ML2 | EN10028-5 P420M | |
| EN10028-5 P420ML1 | EN10028-5 P420ML2 | EN10028-5 P460M | EN10028-5 P460ML1 | ||
| EN10028-5 P460ML2 | |||||
| EN10028-6 | EN10028-6 P355Q | EN10028-6 P460Q | EN10028-6 P500Q | EN10028-6 P690Q | |
| EN10028-6 P355QH | EN10028-6 P460QH | EN10028-6 P500QH | EN10028-6 P690QH | ||
| EN10028-6 P355QL1 | EN10028-6 P460QL1 | EN10028-6 P500QL1 | EN10028-6 P690QL1 | ||
| EN10028-6 P355QL2 | EN10028-6 P460QL2 | EN10028-6 P500QL2 | EN10028-6 P690QL2 | ||
| JIS | JIS G3115 | JIS G3115 SPV235 | JIS G3115 SPV315 | JIS G3115 SPV355 | JIS G3115 SPV410 |
| JIS G3115 SPV450 | JIS G3115 SPV490 | ||||
| JIS G3103 | JIS G3103 SB410 | JIS G3103 SB450 | JIS G3103 SB480 | JIS G3103 SB450M | |
| JIS G3103 SB480M | |||||
| GB | GB713 | GB713 Q245R | GB713 Q345R | GB713 Q370R | GB713 12Cr1MoVR |
| GB713 12Cr2Mo1R | GB713 13MnNiMoR | GB713 14Cr1MoR | GB713 15CrMoR | ||
| GB713 18MnMoNbR | |||||
| GB3531 | GB3531 09MnNiDR | GB3531 15MnNiDR | GB3531 16MnDR | ||
| DIN | DIN 17155 | DIN 17155 HI | DIN 17155 HII | DIN 17155 10CrMo910 | DIN 17155 13CrMo44 |
| DIN 17155 15Mo3 | DIN 17155 17Mn4 | DIN 17155 19Mn6 | |||




