A387Gr11CL2/A387 Grade 11 Class 2, a premium-quality chromium-molybdenum alloy steel plate, has emerged as the material of choice for critical applications in the petroleum, chemical, power, and aerospace industries. This steel plate boasts exceptional high-temperature and high-pressure resistance, coupled with superior mechanical properties, making it an ideal material for the fabrication of essential equipment. In this comprehensive product introduction, we delve into the chemical composition, mechanical properties, heat treatment state, size range, impact testing, primary applications, and supply cases by TJC Steel Group.

Chemical Composition

The chemical composition of A387Gr11CL2/A387 Grade 11 Class 2 is meticulously designed and controlled to ensure optimal performance. The key elements include:

- Carbon (C): 0.05-0.17%

- Silicon (Si): 0.50-0.80%

- Manganese (Mn): 0.40-0.65%

- Phosphorus (P): ≤ 0.035%

- Sulfur (S): ≤ 0.035%

- Chromium (Cr): 1.00-1.50%

- Molybdenum (Mo): 0.45-0.65%

The addition of chromium and molybdenum enhances the steel's oxidation resistance and creep strength at elevated temperatures, while maintaining high strength, toughness, and weldability.

Mechanical Properties

The mechanical properties of A387Gr11CL2/A387 Grade 11 Class 2, as stipulated by the ASTM A387/A387M standard, are as follows:

- Tensile Strength: 515-690 MPa

- Yield Strength: ≥ 240 MPa (also reported as ≥ 310 MPa in some sources)

- Elongation: ≥ 22%

- Impact Toughness: Temperature above -20°C, with Charpy V-notch impact energy averaging ≥ 94 J (or ≥ 54 J, with one specimen allowing ≥ 47 J)

These exceptional mechanical properties ensure stability and reliability under load and deformation.

Heat Treatment State

A387Gr11CL2/A387 Grade 11 Class 2 steel plates are typically delivered in the normalized and tempered condition, with a tempering temperature exceeding 620°C. Alternatively, upon the purchaser's agreement, they can be supplied in as-rolled, normalized, or quenched and tempered states. The heat treatment process optimizes the steel's microstructure, further enhancing its mechanical and high-temperature properties.

Size Range

The size range of A387Gr11CL2/A387 Grade 11 Class 2 steel plates is versatile, catering to various application requirements:

- Thickness: 6mm to 120mm

- Width: 1500mm to 4020mm

- Length: 3000mm to 18000mm

Impact Testing

Impact testing, specifically the Charpy V-notch test, is conducted to assess the material's toughness at low temperatures. The test ensures that the steel plate can withstand sudden impacts without catastrophic failure, particularly important in harsh operating environments.

Primary Applications

Thanks to its superior characteristics, A387Gr11CL2/A387 Grade 11 Class 2 finds widespread applications in:

- Petroleum and Chemical Industries: Manufacturing reactors, heat exchangers, boilers, and other critical equipment.

- Power Industry: Fabrication of boiler components in thermal power plants.

- Aerospace Industry: Production of aircraft engine components due to its excellent high-temperature resistance.

TJC Steel Group Supply Cases

TJC Steel Group, a reputable supplier of high-quality steel products, has successfully delivered A387Gr11CL2/A387 Grade 11 Class 2 steel plates to various clients across industries. Some notable supply cases include:

- Supplying steel plates for the construction of a large-scale petrochemical reactor, ensuring durability and reliability under extreme operating conditions.