1. Chemical composition characteristics of 16MnDG seamless steel pipes: Carbon content 0.12%~0.20%, manganese content 1.20%~1.60%, silicon content 0.20%~0.55%, phosphorus and sulfur content ≤0.025%. Through strict alloying element proportioning, strength is improved while low-temperature toughness is optimized, and impurity content is controlled to reduce the risk of brittleness.
2. Low-temperature toughness advantages of 16MnDG seamless steel pipes: They maintain high resistance to brittle fracture in extremely low-temperature environments ranging from -45℃ to -196℃. Impact test temperatures are typically -40℃ or lower, with an impact energy ≥34J (V-notch). For example, in liquefied natural gas (LNG) storage scenarios, they can maintain structural integrity even at -162℃.
3. Corrosion resistance of 16MnDG seamless steel pipes: Through controlled chemical composition and surface treatment (such as coating anti-corrosion technology), dual protection is achieved, resisting the erosion of corrosive media such as hydrogen sulfide and carbon dioxide. In harsh environments such as petrochemical plants, the smooth inner wall design reduces impurity accumulation and extends pipeline service life.
4. Weldability and Machinability of 4.16MnDG Seamless Steel Pipes: Supports various welding processes, including manual arc welding and gas shielded welding, meeting the welding quality requirements of different projects. Hot rolling, cold drawing, and hot expansion processes, combined with normalizing treatment, ensure dimensional accuracy and improve low-temperature performance. Specifications ranging from 21mm to 762mm in outer diameter and 3.0mm to 130mm in wall thickness cover diverse needs.
5. Application Adaptability of 16MnDG Seamless Steel Pipes: Covers extreme low-temperature applications such as cryogenic oil and gas transportation (e.g., Arctic LNG projects), pressure vessel manufacturing (ensuring the sealing of cryogenic storage tanks), LNG storage and transportation (-162℃ environment), cold storage construction (refrigerant transportation stability), and cryogenic heat exchangers (cooling and heating of chemical production media).
6.16MnDG seamless steel pipe has strict standard specifications: it complies with GB/T18984-2016 standard, and implements full-process control over chemical composition, mechanical properties, dimensional deviation, curvature, and surface quality.
Post time: Feb-24-2026