This article presents a comprehensive overview of A387Gr5CL1/A387 Grade 5 Class 1 chrome-molybdenum alloy steel plates, designed specifically for pressure vessels and boilers. The focus will be on their detailed chemical composition, mechanical properties, heat treatment conditions, dimensional specifications, impact testing requirements, primary applications, and relevant supply cases by TJC Steel Group.

Chemical Composition:

A387Gr5CL1/A387 Grade 5 Class 1 steel plates are renowned for their balanced alloy content, ensuring exceptional strength and corrosion resistance. The chemical composition of these plates, as per ASME SA-387/SA-387M standards, is as follows:

- Carbon (C): ≤ 0.15%

- Silicon (Si): ≤ 0.50%

- Manganese (Mn): 0.30-0.60%

- Phosphorus (P): ≤ 0.035%

- Sulfur (S): ≤ 0.030%

- Chromium (Cr): 4.0-6.0%

- Molybdenum (Mo): 0.45-0.65%

These precise alloy percentages contribute to the steel's outstanding performance under high-temperature and pressure conditions.

Mechanical Properties:

The mechanical properties of A387Gr5CL1/A387 Grade 5 Class 1 steel plates ensure their suitability for demanding applications. The key properties include:

- Tensile Strength (σb): ≥ 590 MPa

- Yield Strength (σ0.2): ≥ 390 MPa

- Elongation (δ5): ≥ 18%

These values demonstrate the steel's high strength and ductility, crucial for withstanding the stresses and deformations encountered in pressure vessels and boilers.

Heat Treatment State:

The A387Gr5CL1/A387 Grade 5 Class 1 steel plates are typically supplied in an annealed, normalized, and tempered condition. Alternatively, upon agreement with the purchaser, accelerated cooling from the austenitizing temperature followed by tempering can be performed. The heat treatment ensures optimal microstructure and mechanical properties for the intended applications.

Dimensional Range:

The dimensional specifications of A387Gr5CL1/A387 Grade 5 Class 1 steel plates vary depending on the specific requirements of the project. Generally, the plates are available in thicknesses ranging from a few millimeters to several hundred millimeters, with widths and lengths tailored to customer specifications.

Impact Testing:

Impact testing is an essential requirement for A387Gr5CL1/A387 Grade 5 Class 1 steel plates, ensuring their ability to withstand sudden load changes without fracturing. The impact test is conducted at specified temperatures, typically at lower temperatures to simulate extreme operating conditions. The plates must meet or exceed the minimum impact energy requirements set by the relevant standards.

Primary Applications:

A387Gr5CL1/A387 Grade 5 Class 1 steel plates find widespread applications in industries requiring high-performance materials for pressure vessels and boilers. Some of the primary applications include:

- Petroleum processing equipment

- Chemical reactors

- Gasifiers

- Heat exchangers

- Hydrogenation reactors

- Power generation equipment (e.g., boilers in fossil fuel power plants)

These applications demand materials that can withstand high temperatures, pressures, and corrosive environments, making A387Gr5CL1/A387 Grade 5 Class 1 steel plates an ideal choice.

TJC Steel Group Supply Cases:

TJC Steel Group, a leading supplier of high-quality steel products, has extensive experience in supplying A387Gr5CL1/A387 Grade 5 Class 1 steel plates to various industries. Some notable supply cases include:

- Petrochemical Complex: Supplying A387Gr5CL1 plates for the construction of critical pressure vessels in a large petrochemical plant. The plates' excellent corrosion resistance and high-temperature strength ensured reliable operation under harsh process conditions.

- Power Generation Project: Providing A387 Grade 5 Class 1 steel plates for the boiler components of a modern coal-fired power plant. The plates' dimensional accuracy and mechanical properties met the strict requirements of the project, contributing to the successful completion of the boiler fabrication.