ASTM A387 Grade 22 Steel Plate

Overview of ASTM A387 Grade 22 Steel Plate

ASTM A387 Grade 22 is a high-performance chrome-molybdenum alloy steel plate specifically engineered for use in weldable pressure vessels and industrial boilers operating at high temperatures. Specified under the ASTM A387/A387M standard, this grade contains a nominal 2.25% Chromium and 1.0% Molybdenum. This increased alloy content compared to Grade 11 provides significantly enhanced resistance to oxidation and corrosion, as well as superior creep strength, making it the premier choice for critical thermal service environments.

Shandong Tanglu Metal Material Co., Ltd. provides premium ASTM A387 Grade 22 plates in both Class 1 and Class 2 conditions. This Pressure Vessel Quality (PVQ) steel is indispensable for heavy-duty industrial equipment that must maintain structural integrity under continuous, extreme thermal stress. For B2B buyers in the global petrochemical, refinery, and power generation sectors, our A387 Gr.22 plates offer a high-integrity Chrome-Moly solution that meets and exceeds international engineering specifications.

Key Features and High-Temperature Advantages

The defining advantage of ASTM A387 Grade 22 is its exceptional stability at elevated temperatures. The 2.25% Chromium content provides an advanced level of protection against oxidation and hydrogen attack, while the 1.0% Molybdenum ensures the material retains high tensile and yield strength at temperatures where standard steels fail. This makes Grade 22 ideal for “Cr-Mo” applications in aggressive heat environments where long-term durability and safety are the absolute priorities. Class 2 plates, through specialized heat treatment, offer even higher mechanical properties for more robust vessel designs.

In the fabrication workshop, ASTM A387 Grade 22 exhibits excellent workability and performance. However, due to its higher alloy content, it requires professional welding procedures, including strictly controlled pre-heating and mandatory Post-Weld Heat Treatment (PWHT) to ensure the ductility and soundness of the welded joints. For B2B procurement, the standardized high quality and reliable high-temperature properties of our A387 Gr.22 plates ensure maximum safety and compliance with global pressure vessel codes such as ASME Section VIII and Section I.

Main Applications of ASTM A387 Grade 22 Steel Plate

ASTM A387 Grade 22 steel plate is a cornerstone for the modern oil & gas and petrochemical industries. It is primarily used for the fabrication of heavy-wall reactors, hydrocrackers, and desulfurization units that handle corrosive fluids at high temperatures and pressures. In the power generation sector, it is essential for high-pressure steam headers, boiler drums, and critical heat exchangers that must withstand sustained thermal cycles.

The grade is also widely utilized in the chemical processing industry for manufacturing large-scale storage tanks and process equipment subjected to aggressive high-heat environments. Its superior resistance to hydrogen embrittlement makes it a preferred material for high-pressure hydrogen service. Due to its proven track record in extreme industrial service, ASTM A387 Grade 22 is the global benchmark for any application requiring high strength, exceptional thermal stability, and maximum corrosion resistance at elevated temperatures.

Why Choose Us for ASTM A387 Grade 22 Steel Plate

Shandong Tanglu Metal Material Co., Ltd. is your specialized B2B partner for ASTM A387 Grade 22 Chrome-Moly steel. We recognize that high-pressure and high-temperature applications allow for zero margin of error, which is why we source our alloy plates from top-tier mills equipped with advanced alloy smelting and heat-treatment facilities. Every plate 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 projects. With a supply capacity of 10,000 tons per month, we can support both urgent equipment replacements and massive multi-year industrial contracts. 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 excellence.