SA387Gr5CL2/A387 Grade 5 Class 2, a premium chromium-molybdenum alloy steel plate, is specifically designed for use in pressure vessels and boilers, adhering to the rigorous standards of ASME and ASTM. This versatile steel grade boasts exceptional performance characteristics, making it an ideal choice for various industries requiring high-temperature and corrosion-resistant materials. TJC Steel Group, a renowned supplier, offers this premium steel plate with a comprehensive range of sizes, ensuring customer satisfaction across diverse applications.

Chemical Composition

The chemical composition of SA387Gr5CL2/A387 Grade 5 Class 2 steel plate is carefully formulated to achieve optimal performance. The alloy primarily consists of iron (Fe) and carbon (C), with significant additions of chromium (Cr) and molybdenum (Mo) to enhance its corrosion resistance and high-temperature strength. The key chemical elements and their ranges are as follows:

- Carbon (C): ≤ 0.15%

- Silicon (Si): ≤ 0.50%

- Manganese (Mn): 0.30-0.60% (or 0.40-0.60% as per different sources)

- Phosphorus (P): ≤ 0.025% (or ≤ 0.035% as per some specifications)

- Sulfur (S): ≤ 0.030%

- Chromium (Cr): 4.00-6.00%

- Molybdenum (Mo): 0.45-0.65%

Mechanical Properties

The mechanical properties of SA387Gr5CL2/A387 Grade 5 Class 2 steel plate are impressive, making it suitable for demanding applications. Key mechanical properties include:

- Tensile Strength: 515-690 MPa

- Yield Strength: ≥ 310 MPa

- Elongation (% in 2"): ≥ 18%

- Reduction of Area: ≥ 45%

These properties ensure that the steel plate can withstand high stress and deformation, maintaining structural integrity under demanding conditions.

Heat Treatment

SA387Gr5CL2/A387 Grade 5 Class 2 steel plate is typically delivered in a heat-treated condition, ensuring optimal performance. The standard heat treatment involves annealing, normalizing, and tempering. Optionally, accelerated cooling from the austenitizing temperature using air blast or liquid quenching followed by tempering can be performed upon request. The low tempering temperature can be as high as 1300°C, depending on specific technical requirements.

Size Range

TJC Steel Group offers SA387Gr5CL2/A387 Grade 5 Class 2 steel plate in a wide range of sizes to meet various customer needs. The typical size range includes:

- Thickness: 1-500 mm (customizable up to 220 mm for thicker plates)

- Width: 10 mm-3500 mm (or up to 3000 mm for thicker plates)

- Length: 1 m-12 m (or as required)

Impact Testing

SA387Gr5CL2/A387 Grade 5 Class 2 steel plate undergoes rigorous impact testing to ensure its suitability for use in low-temperature environments. The impact toughness of the steel is typically evaluated at various temperatures, with results exceeding industry standards.

Main Application Scenarios

Thanks to its exceptional heat resistance, corrosion resistance, and mechanical properties, SA387Gr5CL2/A387 Grade 5 Class 2 steel plate finds widespread applications in:

- Petrochemical Industry: Used in the manufacture of high-pressure vessels, separators, heat exchangers, and storage tanks.

- Oil Refining: Employed in the construction of refinery towers, catalytic cracking units, and hydrogenation units.

- Fertilizer Industry: Utilized in the fabrication of ammonia synthesis towers and urea synthesis towers.

- Natural Gas Industry: Suitable for gas storage tanks, transmission pipelines, and other equipment exposed to corrosive environments.