The A387Gr21CL2/A387 Grade 21 Class 2 steel plates, designed specifically for pressure vessels and boilers, represent a pinnacle in the realm of high-performance alloy steels. Manufactured to the rigorous standards of ASME SA-387, these plates exhibit exceptional chemical composition, mechanical properties, and heat treatment characteristics, making them the preferred choice for demanding applications across various industries. TJC Steel Group, a renowned supplier, boasts an extensive portfolio of A387Gr21CL2 plates, tailored to meet the most stringent requirements.

Chemical Composition

The A387Gr21CL2 steel plates feature a well-balanced chemical composition that ensures optimal performance in extreme conditions. The primary elements include carbon (C), manganese (Mn), phosphorus (P), sulfur (S), silicon (Si), chromium (Cr), and molybdenum (Mo), with their concentrations tightly controlled within specific ranges:

- Carbon (C): 0.05-0.17%

- Manganese (Mn): 0.40-0.65%

- Phosphorus (P): ≤0.025%

- Sulfur (S): ≤0.035%

- Silicon (Si): 0.15-0.40%

- Chromium (Cr): 0.80-1.15%

- Molybdenum (Mo): 0.45-0.60%

This precise blend of elements imparts exceptional strength, corrosion resistance, and high-temperature stability to the plates.

Mechanical Properties

The mechanical properties of A387Gr21CL2 plates are equally impressive, ensuring reliability and durability in service. Key parameters include:

- Tensile Strength (MPa): 380-550

- Yield Strength (MPa): ≥230

- Elongation at Break (% in 200mm): ≥18

- Elongation at Break (% in 50mm): ≥22

These properties, combined with the alloy's exceptional resistance to creep and stress rupture, make A387Gr21CL2 an ideal material for high-pressure and high-temperature applications.

Heat Treatment State

TJC Steel Group supplies A387Gr21CL2 plates in a normalized and tempered condition, ensuring optimal microstructure and mechanical properties. This heat treatment regime enhances the plate's strength, toughness, and resistance to embrittlement, enabling it to withstand harsh operating conditions.

Size Range

The A387Gr21CL2 steel plates are available in a wide range of sizes to cater to diverse application requirements. Typical thicknesses range from 8mm to 300mm, with widths up to 4,000mm and lengths of up to 18,000mm. Custom sizes can also be produced upon request, ensuring flexibility and versatility in project execution.

Impact Testing

TJC Steel Group ensures that all A387Gr21CL2 plates undergo rigorous impact testing to verify their ability to withstand sudden load changes and maintain structural integrity. The plates meet or exceed the specified Charpy V-notch impact energy requirements, demonstrating their excellent low-temperature toughness.

Main Application Scenarios

A387Gr21CL2 steel plates find widespread applications in various industries, including:

- Petroleum and Petrochemical Industry: Used in the construction of reactors, heat exchangers, separators, and storage tanks, where high temperatures and corrosive media are prevalent.

- Chemical Equipment Manufacturing: Ideal for the fabrication of equipment that operates under extreme pressure and temperature conditions, such as distillation columns and converters.

- Power Generation: Employed in the construction of boilers, superheaters, and reheaters in power plants, ensuring reliable and efficient steam generation.

- Nuclear Energy: Used in the fabrication of reactor pressure vessels and other components that require exceptional strength and corrosion resistance.

TJC Steel Group Supply Cases

TJC Steel Group has a rich history of supplying A387Gr21CL2 steel plates for prestigious projects worldwide. Notable cases include:

- Petrochemical Complex: Supplied A387Gr21CL2 plates for the construction of a large-scale petrochemical plant, where the plates were used in the fabrication of critical equipment, such as reactors and heat exchangers.