Nitronic 50 (UNS S20910): High-Strength Marine Austenitic Stainless
ASTM A276 / A479 · Published: 2026-06-02 · Updated: 2026-06-02
Nitronic 50 has 2× the yield strength of 316 (380 vs 205 MPa annealed) with equivalent corrosion resistance (PREN ~34). Cold-working increases to >1,000 MPa while retaining non-magnetic austenitic properties. For US Navy propeller shafts,...
Nitronic 50 has 2× the yield strength of 316 (380 vs 205 MPa annealed) with equivalent corrosion resistance (PREN ~34). Cold-working increases to >1,000 MPa while retaining non-magnetic austenitic properties. For US Navy propeller shafts, submarine fasteners, offshore platform bolting.
Quick Facts
| Category | Stainless Steel |
| Standard | ASTM A276 / A479 |
| Density | 7880 kg/m³ |
| Yield Strength | 380 MPa (annealed) / 1,000 MPa (cold-worked) |
| Tensile Strength | 690 MPa |
Global Equivalents & Cross-Reference
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Frequently Asked Questions
Nitronic 50 vs 316?
2× annealed strength, 4× after cold-working. Same corrosion resistance. Weight savings justify 2-3× cost premium for marine and aerospace.
References & International Standards
- ASTM International. Standard Specifications for Steel & Metal Alloys. astm.org
- International Organization for Standardization (ISO). Metallic Materials — Cross-Reference Database. iso.org
- American Iron and Steel Institute (AISI). Steel Grade Designations & Equivalents. steel.org
- European Committee for Standardization (CEN). EN Steel Standards & Numbering System. cencenelec.eu