Product Overview

Alloy steel plate is a high-performance steel made by adding alloy elements such as chromium (Cr), nickel (Ni), and molybdenum (Mo) to carbon steel and using advanced rolling and heat treatment processes. Its excellent strength, toughness, wear resistance, and corrosion resistance make it a core material in high-end fields such as energy, engineering machinery, shipbuilding, and military industry.

ASME SA387 / ASTM A387 Chrome Moly Plate Technical Specifications

• Grades Available: SA387 Grade 5, 9, 11, 12, 22, and 91

• Thickness: 6mm to 250mm (0.24" to 9.84")

• Width: Up to 3500mm (137.8")

• Length: Up to 18000mm (708.7")

• Standards: ASTM, ASME, and other international standards

• Heat Treatment: Annealed, Normalized and Tempered, Quenched and Tempered

ASME SA387 / ASTM A387 Plate Customization and Certification

• We understand that each project has unique requirements. Therefore, we offer customization options to meet your specific needs. Our steel plates can be cut, shaped, and treated according to your specifications. We also provide additional services such as pre-machining, beveling, and coating.

• Additionally, we provide full certification and traceability for every plate, ensuring compliance with the highest industry standards, including mill test certificates (MTC), EN 10204 3.1/3.2 certification, and third-party inspection reports.

Why Choose Our SA387/A387 Steel Plates?

1. Exceptional Quality Our SA387/A387 steel plates are manufactured to the highest standards, ensuring top-notch quality and performance. Rigorous quality control processes are in place to guarantee that each plate meets the required specifications and industry standards. Each batch undergoes extensive testing, including ultrasonic testing, impact testing, and chemical analysis, to ensure consistency and reliability.

2. High-Temperature Resistance Designed for applications where heat resistance is crucial, SA387/A387 steel plates can withstand extreme temperatures up to 600°C (1112°F) without compromising their structural integrity. This makes them ideal for use in boilers, pressure vessels, and heat exchangers. The chromium and molybdenum alloying elements provide excellent oxidation and sulfidation resistance.

3. Enhanced Durability These steel plates are not only heat resistant but also highly durable. They offer excellent corrosion resistance, particularly in environments with high sulfur content. Their superior mechanical properties, including high tensile strength and hardness, make them capable of enduring harsh environmental conditions, extending the lifespan of your equipment and reducing maintenance costs.

4. Versatile Applications

• Oil and Gas: Ideal for pressure vessels and offshore drilling platforms.

• Power Generation: Perfect for boilers and thermal power stations.

• Petrochemical: Suitable for reactors and chemical processing equipment.

• Chemical Processing: Used in heat exchangers and other high-temperature equipment.

ASTM A387 Grade 11Class2 Specification：

Thickness: 5MM - 300MM Width: 1500mm - 4050mm Length: 3000mm - 15000mm

Chemical composition :

Mechanical Property :

Delivery Condition: normalizing+ tempering

So far, GNEE Steel has provided over 2,500 tons of these high-quality plates for key components, such as EO reactors, hydrogenation reactors, high-pressure vessels, and gasification units.

Different Grades of ASTM / ASME A387 Grade 11 Chromium Molybdenum Steel：

· ASTM A387 Grade 11 Class 2

· ASME SA387 Grade 11 Class 2

Send product details such as steel grade, size and quantity to receive an accurate quote.

   Product Advantages

High-strength performance: tensile strength can reach 500-1500MPa, meeting the needs of extreme working conditions

Excellent environmental adaptability: low temperature resistance (-60℃), high temperature resistance (550℃), corrosion resistance (marine/chemical environment)

Strict international compliance: complies with ASTM, EN, JIS and other national standards, supports third-party testing and certification

Flexible customization service: thickness 6-300mm optional, supports laser/water jet cutting and pre-welding processing

   Factory Appearance

We are a reliable manufacturer with 13 years of experience in the field of alloy steel plates. With fully automated production lines and precision heat treatment technology, we provide high-strength, corrosion-resistant steel plate solutions for customers in the fields of energy, machinery, construction, etc. Our products strictly follow ISO, ASTM, and EN standards. From raw materials to finished products, we strictly control the chemical composition, mechanical properties, and non-destructive testing throughout the process, and have passed international certifications such as ISO 9001 and EN 1090.

   Packing And Shipping

We ensure that the alloy steel plates are protected with anti-rust coating, waterproof membrane and shock-absorbing materials. Standard packaging includes steel strapping + wooden box/iron rack. For fragile or oversized steel plates, we can provide customized solutions.

With more than 13 years of export experience, we provide door-to-door logistics services by sea, rail, and air.

   Application Areas

Alloy steel plates, with superior strength, corrosion resistance, and specialized properties, are widely used in high-end industries including engineering machinery, energy/power, and marine/defense. We offer full-range, internationally compliant solutions to ensure your project’s success.

   Why Choose Us？

Shandong Zhongji Metal Products Co., Ltd. is a comprehensive steel enterprise integrating steel research and development, production, processing and trade. The company has a diversified product matrix, which is widely used in dozens of industries and exported to more than 50 countries and regions around the world, including Southeast Asia, the Middle East, Europe, Africa, and the Americas, and has established a good reputation in many international projects.