SA 387 Gr 5 Cl 2 is a ASTM/ASME standard for a chrome-molybdenum alloy steel plate, specifically designed for weldable pressure vessels and boilers operating at elevated temperatures, offering excellent high-temperature strength, corrosion, and oxidation resistance due to its chromium and molybdenum content. The "Class 2" designation indicates specific mechanical properties and heat treatment requirements, generally meaning it's normalized and tempered for enhanced toughness.
Chemical Composition of SA387 GR.5 CL.2 Plate
| C | Mn | P | S | Si | Mo | Cr |
| 0.15 max. | 0.25 - 0.66 | 0.035 | 0.030 | 0.55 max. | 0.40 - 0.7 | 3.9 - 6.1 |
Mechanical Properties of SA 387 GR.5 CL.2 Plate
| Tensile Strength | Yield Strength | Elongation in 50mm (%) | Reduction of area in % |
| 75-100 ksi, 515-690 MPa | 45 Ksi, 310 MPa | 18 | 45 |
Applications:
Pressure Vessels: Used for building vessels that contain high-pressure fluids at high temperatures.
Oil & Gas Industry: Essential for exploration, refining, and transportation equipment due to its resistance to corrosive elements and heat.
Power Generation: Utilized in thermal power plants, steam boilers, and heat recovery steam generators (HRSG).
Chemical Industry: Employed in various chemical processing equipment where corrosion resistance is critical.
Heat Exchangers & Boilers: Ideal for components requiring excellent high-temperature performance and durability.
Nuclear Reactors: Suitable for components in nuclear reactor pressure vessels.
Advantages:
High-Temperature Performance: Contains Molybdenum (Mo) for increased tensile strength at elevated temperatures, crucial for high-pressure, high-heat applications.
Corrosion Resistance: Chromium (Cr) provides excellent resistance to general corrosion, pitting, crevice corrosion, and sulfide stress cracking (sour service).
Weldability: Designed for good weldability, even at higher temperatures, allowing for fabrication of complex pressure vessels.
Strength & Toughness: Offers high tensile strength, yield strength, hardness, and toughness, maintaining structural integrity under stress.
Durability: Durable and long-lasting, with a long service life in harsh industrial conditions.
If you have project requirements for SA 387 Gr 5 Cl 2, we welcome your inquiry. GNEE maintains a large inventory of commonly used high strength steel grades for your selection.For detailed mechanical properties, chemical composition, and technical data, as well as free samples, please contact our factory immediately. We offer competitive prices, stable quality, and professional service. Email:beam@gneesteelgroup.com.
1.What material is SA 387 Gr 5 Cl 2?
SA 387 Gr 5 Cl 2 is a Chromium-Molybdenum (Cr-Mo) alloy steel plate, specified by ASME, designed for high-temperature service in welded boilers and pressure vessels, featuring significant Chromium (around 5%) and Molybdenum (around 0.5%) for improved strength and corrosion resistance at elevated temperatures, with Class 2 indicating higher strength requirements than Class 1.
2.Is SA 387 Gr 5 Cl 2 carbon steel?
No, SA 387 Grade 5 Class 2 is not plain carbon steel; it's a chrome-molybdenum (Cr-Mo) alloy steel, specifically designed for high-temperature, weldable pressure vessels and boilers, featuring significant chromium (around 4-6%) and molybdenum (around 0.45-0.65%) for enhanced strength, corrosion, and oxidation resistance, with low carbon content (0.15% max).