ASTM A387 Grade 11 Steel Plate

Overview of ASTM A387 Grade 11 Steel Plate

ASTM A387 Grade 11 is a high-quality chrome-molybdenum alloy steel plate specifically designed for use in weldable pressure vessels and industrial boilers operating at elevated temperatures. Specified under the ASTM A387/A387M standard, this grade contains 1.25% Chromium and 0.5% Molybdenum. This unique chemical composition provides exceptional resistance to oxidation and corrosion, while significantly enhancing the material’s creep strength and tensile properties in high-temperature environments.

Shandong Tanglu Metal Material Co., Ltd. provides premium ASTM A387 Grade 11 plates (available in both Class 1 and Class 2) that meet the rigorous demands of the global energy and petrochemical sectors. This grade is a cornerstone for the fabrication of equipment that must maintain structural integrity under continuous thermal stress. For B2B buyers looking for a dependable Chrome-Moly solution for refineries and power plants, our A387 Gr.11 plates offer a high-performance foundation that exceeds international engineering standards.

Key Features and High-Temperature Advantages

The defining feature of ASTM A387 Grade 11 is its superior thermal stability and resistance to hydrogen attack. The addition of Chromium provides the necessary oxidation resistance, while the Molybdenum enhances the material’s strength at temperatures where standard carbon steels would lose their load-bearing capacity. This makes it ideal for “Cr-Mo” applications where long-term durability in high-heat environments is the primary design requirement. Class 2 plates offer higher tensile and yield strength through specialized heat treatment, allowing for more robust designs.

In the fabrication facility, ASTM A387 Grade 11 exhibits excellent weldability and formability, provided that professional pre-heating and post-weld heat treatment (PWHT) procedures are followed. Its consistent chemical profile ensures predictable performance during heavy rolling and the manufacturing of pressure vessel shells. For B2B procurement, the standardized high quality and reliable high-temperature properties of our A387 Gr.11 plates ensure maximum safety and compliance with global codes such as ASME Section VIII and Section I.

Main Applications of ASTM A387 Grade 11 Steel Plate

ASTM A387 Grade 11 steel plate is a foundational material for the petrochemical and oil & gas industries. It is most commonly used in the fabrication of heat exchangers, refinery reactors, and pressure vessels that handle high-temperature fluids and gases. In the power generation sector, it is indispensable for manufacturing high-pressure steam pipes, boilers, and auxiliary equipment that must withstand sustained thermal cycles without compromising safety.

The grade is also widely used in specialized chemical processing plants for manufacturing storage tanks and process equipment subjected to corrosive high-temperature environments. Its ability to maintain structural soundness under heat makes it a preferred choice for the aerospace and energy-from-waste industries as well. Due to its proven track record in extreme thermal service, ASTM A387 Grade 11 is the global benchmark for any industrial application where high strength and corrosion resistance are mandatory at elevated temperatures.

Why Choose Us for ASTM A387 Grade 11 Steel Plate

Shandong Tanglu Metal Material Co., Ltd. is your professional partner for ASTM A387 Grade 11 Chrome-Moly steel. We understand that high-temperature service allow for zero margin of error, which is why we source our alloy plates from top-tier mills specializing in PVQ (Pressure Vessel Quality) steels. Every order is supplied with original Mill Test Certificates (MTC) providing full traceability and verifying compliance with the chemical and mechanical requirements of ASTM A387 Class 1 or Class 2.

Our strategic logistics network, based near major Chinese ports like Tianjin, Shanghai, and Qingdao, ensures efficient global shipping and competitive lead times for international B2B projects. With a supply capacity of 10,000 tons per month, we can support both urgent maintenance requirements and large-scale industrial construction projects. We also offer expert value-added services, including precision CNC cutting, beveling, and shot-blasting. Choose Shandong Tanglu for technical expertise, stable quality, and a commitment to your industrial engineering success.