SA387Gr91Cl2 hot-rolled plate and SA516Gr70 hot-rolled plate are two steel plate materials designed for different purposes. They differ significantly in composition, performance, and application fields. Below is a detailed comparison and analysis of these two grades.
Chemical Composition
SA387Gr91Cl2 :
Main Elements: This grade is a chromium-molybdenum alloy steel, with about 9% chromium and 1% molybdenum as the primary alloying elements. It also contains small amounts of vanadium, nitrogen, and others.
Characteristics: The addition of chromium and molybdenum enhances high-temperature strength and oxidation resistance.
SA516Gr70:
Main Elements: This is a carbon steel, primarily composed of iron and carbon, with small amounts of manganese, silicon, phosphorus, and sulfur.
Characteristics: Its simple composition provides good toughness and excellent weldability.
Mechanical Properties
SA387Gr91Cl2:
Tensile Strength: Higher than SA516Gr70, making it suitable for high-temperature, high-pressure service.
Yield Strength: Also higher, with the ability to maintain strength under elevated temperatures.
Heat Resistance: Excellent, thanks to its alloying elements.
SA516Gr70:
Tensile Strength: Moderate, suitable for ambient or medium-low temperature conditions.
Yield Strength: Lower, but provides good ductility.
Heat Resistance: Inferior to SA387Gr91Cl2, mainly designed for ambient service.
Application Fields
SA387Gr91Cl2:
High-Temperature Applications: Commonly used in power station boilers, heat exchangers, and pressure vessels exposed to high temperature and pressure.
Petrochemical Industry: Suitable for environments requiring heat and corrosion resistance.
SA516Gr70:
Ambient Pressure Vessels: Widely used in oil tanks, storage tanks, and similar vessels.
Medium-Low Temperature Service: Suitable for applications requiring toughness and good weldability, such as boilers and pressure vessels.
Weldability
SA387Gr91Cl2:
Welding Difficulty: Due to its high alloy content, preheating and post-weld heat treatment are required to avoid hot cracking.
Welding Consumables: Requires matched alloy filler metals.
SA516Gr70:
Weldability: Very good, easy to weld without special preheat or post-weld heat treatment.
Welding Consumables: Standard carbon steel electrodes/fillers are sufficient.
Heat Treatment
SA387Gr91Cl2:
Requirements: Usually normalized and tempered to optimize mechanical properties.
Purpose: To improve strength, toughness, and heat resistance.
SA516Gr70:
Requirements: Normalizing may be applied when needed to improve toughness.
Purpose: Mainly to enhance ductility and uniformity.
Cost Factors
SA387Gr91Cl2:
Cost: Higher, due to alloying elements and more complex manufacturing processes.
Value: Suitable for demanding engineering projects, offering high performance-to-cost ratio.
SA516Gr70:
Cost: Relatively lower, suitable for large-scale production and use.
Value: Economical and widely applied in general engineering projects.
Standards and Specifications
SA387Gr91Cl2:
Standard: ASTM A387/A387M, applicable to chromium-molybdenum alloy steel plates.
Specification: Strict quality control and testing requirements to guarantee high-temperature performance.
SA516Gr70:
Standard: ASTM A516/A516M, applicable to carbon steel plates.
Specification: Relatively less stringent, suitable for general industrial purposes.
Conclusion
SA387Gr91Cl2 pressure vessel plate and SA516Gr70 pressure vessel plate differ significantly in chemical composition, mechanical properties, and application scope. SA387Gr91Cl2 is ideal for high-temperature, high-pressure environments, with outstanding heat resistance and strength, whereas SA516Gr70 is better suited for ambient or medium-low temperature service, offering excellent toughness and weldability. The choice between them should be made based on specific engineering requirements and working conditions.
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 SA516Gr70, 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 |
