Nitronic 50 is a nitrogen-strengthened austenitic stainless steel offering an exceptional combination of high strength, excellent corrosion resistance, and good fabricability. With twice the yield strength of 316/316L and corrosion resistance exceeding that of 316, this alloy maintains its mechanical properties from cryogenic to elevated temperatures. It is the preferred material for marine shafts, oil & gas downhole equipment, chemical processing, and nuclear applications requiring reliability in aggressive environments .
1. Product Specifications & Physical DataZYTC Alloy supplies Nitronic 50 in comprehensive mill forms for demanding industrial applications requiring verified properties and complete material traceability. Available Forms: Bar, wire, sheet, plate, strip, coil, fasteners, and forgings . Specifications: ASTM A240, ASTM A276 (XM-19), ASTM A312, AMS 5764, UNS S20910 .
| Chemical Composition (Weight %) | Nitronic 50 Specification |
|---|
| Chromium (Cr) | 20.5 - 23.5 | | Nickel (Ni) | 11.5 - 13.5 | | Molybdenum (Mo) | 1.5 - 3.0 | | Manganese (Mn) | 4.0 - 6.0 | | Nitrogen (N) | 0.20 - 0.40 | | Niobium (Nb) | 0.10 - 0.30 | | Vanadium (V) | 0.10 - 0.30 | | Carbon (C) | 0.06 max. | | Silicon (Si) | 1.0 max. | | Phosphorus (P) | 0.040 max. | | Sulfur (S) | 0.030 max. | | Iron (Fe) | Balance |
| Physical Properties | Metric | Imperial |
|---|
| Density | 7.88 g/cm³ | 0.285 lb/in³ | | Modulus of Elasticity | 200 GPa | 29.0 × 10⁶ psi | | Thermal Conductivity (RT) | 14.1 W/m·K | 98 BTU·in/hr·ft²·°F | | Magnetic Permeability | < 1.02 | < 1.02 |
| Mechanical Properties (Annealed) | Value | Unit |
|---|
| Tensile Strength (min.) | 690 MPa | 100 ksi | | Yield Strength (0.2% offset) | 380 MPa | 55 ksi | | Elongation (min.) | 35% | 35% | | Reduction of Area (min.) | 55% | 55% | | Hardness (Rockwell C) | >20 HRC | >20 HRC | | Hardness (Brinell) | 185-240 | 185-240 |
2. Fabrication & Material ComparisonHeat Treatment: Anneal at 1065-1120°C (1950-2050°F), rapid quench; cannot be hardened by heat treatment . Hot Working: Forge at 1065-1177°C (1950-2150°F); avoid working below 927°C . Cold Working: Work-hardening rate higher than 304; intermediate annealing may be required for severe deformation . Machining: Tougher to machine than 304 due to work hardening; requires rigid setups, positive feeds, slow speeds, and ample coolant . Welding: Good weldability using TIG, MIG, and SMAW methods; matching filler recommended; no post-weld heat treatment required for corrosion resistance . Material Comparison: vs. 316/316L Stainless: Twice the yield strength; superior pitting and crevice corrosion resistance; better seawater performance . vs. Nitronic 40: Higher alloy content provides superior corrosion resistance; selected for more aggressive environments . vs. 2205 Duplex: Comparable strength; Nitronic 50 offers better toughness at cryogenic temperatures and remains fully austenitic .
3. ApplicationsMarine: Boat shafts, propeller shafts, marine hardware, seawater piping, pump components Oil & Gas: Valves, pumps, fasteners, downhole tools, wellhead equipment, Christmas trees Chemical Processing: Heat exchangers, reactor vessels, piping systems, tanks Nuclear: Reactor components, control rod mechanisms, spent fuel handling equipment Pulp & Paper: Processing equipment, digesters, bleach washers Food Processing: Machinery requiring high strength, corrosion resistance, and cleanability Textile: Equipment exposed to corrosive processing chemicals
Contact ZYTC Alloy for certified Nitronic 50 materials with complete traceability, ASTM/AMS specifications, technical datasheets, and competitive pricing on standard sizes or custom-fabricated components. Email: daisy@zytcsteel.com WhatsApp/WeChat: +86 17335753350 |
