Chemical Composition and Mechanical Property
| Grade | C% | SI% | Mn% | Ni% | Mo% | V% | Nb% | Alt% | P%, max | S%, max |
| 15MnNiDR | ≤O.18 | 0.15-0.50 | 1.2-1.6 | 0.20-0.60 | ≤O.050 | ≥0.020 | 0.02 | 0.008 | ||
| Steel Grade | Thickness, in mm | Tensile Strength | Yield Strength, min | Elongation, %, min |
| 15MnNiDR | 6<T≤16 | 480-620 | 325 | 20 |
| 16<T≤36 | 470-600 | 315 | ||
| 36<T≤60 | 460-590 | 305 |
Firstly, 15MnNiDR Low temperature container plate exhibits excellent low-temperature toughness. At extremely low temperatures, many metals become brittle and hard, losing their original toughness and ductility, and are prone to brittle fracture. However, 15MnNiDR cryogenic container plate, through its special alloy composition design and heat treatment process, maintains excellent toughness and ductility at extremely low temperatures, ensuring safety and reliability in cryogenic environments.
Secondly, 15MnNiDR Low temperature container plate exhibits excellent weldability. Welding is an unavoidable process in the manufacture of cryogenic pressure vessels. 15MnNiDR cryogenic container plate offers excellent weldability, meeting the requirements of various welding methods, ensuring the quality and strength of welded joints, and thus guaranteeing the sealing and safety of the entire pressure vessel.
In addition, 15MnNiDR Low temperature container plate exhibits excellent corrosion resistance and resistance to hydrogen-induced cracking. In industries like petroleum and chemical processing, media are often corrosive and can easily damage metal materials.
However, 15MnNiDR Low temperature container plates, through their rational alloy composition design and surface treatment, effectively resist these corrosive media, extending their service life. Furthermore, in the presence of media like hydrogen, some metals are susceptible to hydrogen-induced cracking. However, 15MnNiDR Low temperature container plates offer superior resistance to hydrogen-induced cracking, ensuring safe use in harsh environments.
