A387Gr22CL2/A387 Grade 22 Class 2, a chromium-molybdenum alloy steel plate, is a premium material designed specifically for pressure vessels and boilers in demanding environments. Certified under ASME SA387/SA387M standards, this alloy plate combines exceptional corrosion resistance, high-temperature strength, and outstanding weldability, making it an ideal choice for a wide range of industrial applications. In this product introduction, we delve into the detailed chemical composition, mechanical properties, heat treatment, dimensional capabilities, impact testing, key application areas, and TJC Steel Group's supply cases of A387Gr22CL2/A387 Grade 22 Class 2.

Chemical Composition

The A387Gr22CL2/A387 Grade 22 Class 2 steel plate boasts a carefully balanced chemical composition that ensures its superior performance. The key elements and their ranges are as follows:

- Carbon (C): 0.05-0.15%

- Silicon (Si): ≤0.10%

- Manganese (Mn): 0.30-0.60% (some sources specify 0.25-0.63%)

- Sulfur (S): ≤0.005%

- Phosphorus (P): ≤0.010%

- Chromium (Cr): 2.00-2.50% (some sources specify 1.95-2.60%)

- Molybdenum (Mo): 0.90-1.10% (some sources specify 0.87-1.13%)

- Other trace elements such as Ni, Cu, Nb, V, Ti, and Al are tightly controlled within limits to maintain optimal alloy properties.

Mechanical Properties

The mechanical properties of A387Gr22CL2/A387 Grade 22 Class 2 ensure its structural integrity and durability under extreme conditions. Key mechanical properties include:

- Tensile Strength (σb/MPa): 515-690 MPa

- Yield Strength (σs/MPa): 310-620 MPa

- Elongation After Fracture (δ5/%): ≥18%

- Reduction of Area (ψ/%): ≥45%

- Cold Bending Test (b=2a): No cracks after 180° bending

The steel plate also demonstrates excellent low-temperature toughness, with a Charpy V-notch impact energy of ≥54J average and ≥47J single value at -30°C.

Heat Treatment

A387Gr22CL2/A387 Grade 22 Class 2 steel plates are delivered in a normalized and tempered condition, ensuring optimal microstructure and properties. The normalization temperature does not exceed 968°C, while the tempering temperature is maintained at a minimum of 720°C. This heat treatment regime enhances the material's resistance to embrittlement and promotes uniform properties throughout the plate.

Size Range

TJC Steel Group offers A387Gr22CL2/A387 Grade 22 Class 2 steel plates in a wide range of thicknesses, widths, and lengths to meet diverse customer requirements. Typical dimensions include:

- Thickness: 8mm-150mm

- Width: 1600mm-2500mm

- Length: 6000mm-12000mm

Impact Testing

To ensure the material's resilience in low-temperature applications, A387Gr22CL2/A387 Grade 22 Class 2 steel plates undergo rigorous impact testing at -30°C. The Charpy V-notch impact test demonstrates the steel's ability to absorb energy and resist fracture, critical for safe operation in cold environments.

Main Application Scenarios

Thanks to its exceptional properties, A387Gr22CL2/A387 Grade 22 Class 2 steel plate finds extensive use in various industries:

- Oil & Gas: Reactors, heat exchangers, separators, tanks, and pressure vessels for refining and processing operations.

- Chemical Industry: Equipment for handling corrosive chemicals, including reactors, distillation columns, and storage tanks.