GB 09MnNiDR Steel Plate

Overview of GB 09MnNiDR Steel Plate

GB 09MnNiDR is a premium ultra-low temperature pressure vessel steel specified under the GB 3531 standard. Designed for extreme cryogenic service, it is engineered to maintain exceptional structural integrity at temperatures as low as -70°C. The designation “09” reflects its low carbon content (nominally 0.09%), while “MnNi” indicates its manganese and nickel alloying, “D” stands for Low Temperature (Diwen), and “R” signifies its certification for Pressure Vessels (Rongqi). This grade is the industry standard for high-safety containment in LNG, ethylene, and other cryogenic processing facilities.

Shandong Tanglu Metal Material Co., Ltd. supplies high-purity 09MnNiDR plates that undergo advanced metallurgical refining, including vacuum degasification and fine-grain practice. The inclusion of Nickel (Ni) ensures that the material retains superior ductility and resists brittle fracture even in the harshest sub-zero environments. For B2B buyers engaged in large-scale energy infrastructure, our 09MnNiDR plates provide a reliable, high-performance solution backed by full Mill Test Certificates (MTC) and documented impact test performance at -70°C.

Key Features and Cryogenic Engineering Advantages

The primary advantage of GB 09MnNiDR is its guaranteed impact energy absorption at ultra-low temperatures. Unlike standard low-temp steels, the Manganese-Nickel alloy system in 09MnNiDR provides a significantly lower ductile-to-brittle transition temperature. By strictly controlling the Phosphorus (P ≤ 0.020%) and Sulfur (S ≤ 0.005%) levels, we achieve extreme material cleanliness, which is crucial for preventing fatigue cracking and ensuring the safety of pressurized cryogenic storage systems.

In terms of fabrication, GB 09MnNiDR offers professional-grade weldability and cold-forming properties. Every plate is delivered in a strictly Normalized (N) or Normalized + Tempered (N+T) condition to ensure a uniform microstructure. It is highly responsive to precision CNC plasma cutting and demonstrates excellent performance during the rolling of thick vessel shells. For critical projects, we provide value-added services such as HIC (Hydrogen-Induced Cracking) testing, SSCC testing, and Z-direction testing (Z15/Z25/Z35) to guarantee 100% compliance with international pressure equipment directives.

Main Applications of GB 09MnNiDR Steel

GB 09MnNiDR is an essential material for equipment operating in the cryogenic temperature range. Its most common application is in the fabrication of storage tanks and transportation vessels for liquefied petroleum gas (LPG), ethylene, and liquid ammonia. In the petrochemical and gas processing industries, it is the preferred choice for low-temperature separators, heat exchangers, and cryogenic towers.

Beyond petrochemical facilities, 09MnNiDR is widely used in the aerospace and research sectors for environmental test chambers and vacuum vessels that simulate extreme cold. It is also an indispensable material for offshore energy platforms operating in arctic or sub-arctic regions where structural safety at ultra-low temperatures is paramount. Due to its proven track record in high-integrity cryogenic service, GB 09MnNiDR is the trusted global benchmark for ultra-low temperature pressure vessel steel.