022Cr25Ni7Mo4N duplex stainless steel seamless pipe is a high-performance material widely used in demanding industries. It complies with TSG D7002 Rules for Type Testing of Pressure Piping Components, ensuring reliability and safety.
Chemical Composition of 022Cr25Ni7Mo4N Duplex Stainless Steel Seamless Pipe
This duplex stainless steel contains:
C≤0.030, Si≤0.80, Mn≤1.20, P≤0.035, S≤0.015
Ni 6.00–8.00, Cr 24.0–26.0, Mo 3.00–5.00, N 0.21–0.32, Cu≤0.50
The balanced composition provides excellent corrosion resistance, high strength, and durability.
Specifications & Delivery of 022Cr25Ni7Mo4N Duplex Stainless Steel Seamless Pipe
OD: 57 mm–2680 mm
Wall Thickness: 1.2 mm–60 mm
Delivery Condition: Heat treatment + pickling
Manufacturing Process of 022Cr25Ni7Mo4N Duplex Stainless Steel Seamless Pipe
Production involves smelting, casting/forging, hot or cold rolling, heat treatment, and surface finishing. Electric furnace and electroslag remelting ensure purity and stability. Hot rolling is used for thick sections, while cold rolling produces thinner pipes with precise dimensions.
Key Properties of 022Cr25Ni7Mo4N Duplex Stainless Steel Seamless Pipe
Duplex microstructure combines high strength and toughness.
Excellent resistance to pitting, crevice corrosion, and stress corrosion cracking.
Superior weldability and formability compared with traditional grades like 316L.
Applications of 022Cr25Ni7Mo4N Duplex Stainless Steel Seamless Pipe
Oil & Gas Pipelines and Equipment
Shipbuilding and Offshore Structures
Food Processing Equipment
Seawater Desalination & Pulp and Paper Industry
Environmental Adaptability of 022Cr25Ni7Mo4N Duplex Stainless Steel Seamless Pipe
Performs well in acidic, alkaline, and seawater environments. Proper heat treatment avoidsσ-phase precipitation between 850–900°C, ensuring stable mechanical and corrosion-resistant properties.
Economic Advantage of 022Cr25Ni7Mo4N Duplex Stainless Steel Seamless Pipe
Although initial cost is higher, the long service life, low maintenance, and reliability of 022Cr25Ni7Mo4N duplex stainless steel seamless pipes provide significant long-term savings.
United Steel Industry As the most important steel pipe manufacturer and exporter in China, in the past 20 years, we have completed more than 100 projects, with partners in more than 100 countries, and established relationships with oil and gas and EPC companies in many countries business relationship.
For more information about the product price, catalog and rolling mill inspection certificate,
please consult:Email:Sales@usisteels.com
