1.4318 Stainless Steel Composition: Nitrogen‑Alloyed Austenitic Grade for High‑Strength Applications
1.4318 (X2CrNiN18‑7) is a low‑carbon, nitrogen‑alloyed austenitic stainless steel grade specified under EN 10028‑7 and EN 10088‑2. Its typical composition includes 16.5–18.5% chromium, 6–8% nickel, and 0.10–0.20% nitrogen.This alloy design provides higher yield strength while maintaining good corrosion resistance, making it suitable for load‑bearing and welded structural components.
Compared with conventional 304 stainless steel, 1.4318 offers significantly higher strength and improved weldability, while retaining good ductility after cold working. Yield strength commonly reaches 450–500 MPa or higher, making it ideal for automotive structures, railway components, pressure equipment, and welded assemblies requiring enhanced mechanical performance.
1.4318 is supplied in cold‑rolled sheets, hot‑rolled plates, strips, and tubes. Its low‑carbon composition improves resistance to intergranular corrosion, while nitrogen enhances austenite stability and work‑hardening capability. As an improved version of the 301 family (301LN), 1.4318 provides a balanced combination of strength, formability, and corrosion resistance for demanding industrial applications.
Compared with conventional 304 stainless steel, 1.4318 offers significantly higher strength and improved weldability, while retaining good ductility after cold working. Yield strength commonly reaches 450–500 MPa or higher, making it ideal for automotive structures, railway components, pressure equipment, and welded assemblies requiring enhanced mechanical performance.
1.4318 is supplied in cold‑rolled sheets, hot‑rolled plates, strips, and tubes. Its low‑carbon composition improves resistance to intergranular corrosion, while nitrogen enhances austenite stability and work‑hardening capability. As an improved version of the 301 family (301LN), 1.4318 provides a balanced combination of strength, formability, and corrosion resistance for demanding industrial applications.