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| Grade | Code | UNS | Austenitic Stainless Steel |
| Nitronic 50 / XM-19 | X3CrNiMnMo22-13-3-2 | S20910 |
Nitronic 50 / XM-19 is an austenitic stainless steel grade that combines high strength with strong corrosion resistance. In the annealed condition, it provides higher mechanical strength than conventional 300-series stainless steels and largely retains its properties at both low and elevated temperatures. It also stands out for maintaining low magnetic permeability even after cold working, together with good toughness and weldability.
| C % | Si % | Mn % | P % | S % | Cr % | Ni % | Mo % | N % | Nb % | V % | Fe % |
| ≤0.06 | ≤1.00 | 4.00–6.00 | ≤0.04 | ≤0.03 | 20.50–23.50 | 11.50–13.50 | 1.50–3.00 | 0.20–0.40 | 0.10–0.30 | 0.10–0.30 | Bal. |
| Product form | Rp0.2 [MPa] | Rm [MPa] | Elongation [%] | Hardness [HB] | Density [g/cm³] |
| Bar | ≥ 380 | ≥ 690 | ≥ 35 | ≤ 293 | 7.88 |
| Plate | ≥ 380 | ≥ 690 | ≥ 35 | ≤ 241 | 7.88 |
| Sheet | ≥ 380 | ≥ 690 | ≥ 35 | ≤ 241 | 7.88 |
- Bar values are based on ASTM A276/A479; plate and sheet values are based on ASTM A240.
| Sector | Most common products |
| Marine and shipbuilding | Propeller and pump shafts, seawater pumps, ballast system valves |
| Oil and natural gas | Downhole equipment, valve stems, high-strength fasteners |
| Chemical and petrochemical | Pressure vessels, heat exchangers, pumps and valves |
| Fertilizer and urea production | Ammonium carbamate pumps, process piping and fittings, reactor equipment |
| Pulp and paper | Sulfite liquor valves, pump components, pipe fittings |
| Nuclear and waste management | Nuclear waste containers, waste calcination system components, fluoride handling equipment |
| Food processing | Process pumps, sanitary valves, high-strength fasteners |
| Aerospace and defense | High-strength fasteners, pins, control and transmission shafts |
| Industrial equipment | Springs, chains and cables, shaft components exposed to wear |
Nitronic 50 / XM-19 varies significantly in its mechanical properties depending on the delivery condition; annealed, hot-rolled, and strain-hardened materials do not provide the same performance. It cannot be hardened by heat treatment, but its strength can be markedly increased by cold working. Because of its high work-hardening tendency, machining requires low cutting speeds, rigid tool holding, and continuous cutting. ER209 filler metal is preferred in welding to obtain strength and corrosion resistance close to those of the base material. Nitronic 50 / XM-19, however, remains susceptible to stress corrosion cracking in hot chloride environments despite its high general corrosion resistance.
Nitronic® 50, Alloy 50, AISI/ASTM XM-19, UNS S20910, ISO X3CrNiMnMo22-13-3-2
| Product form | ASTM | AMS |
| Bar | ASTM A276, ASTM A479 | AMS 5764F |
| Plate | ASTM A240 | — |
| Sheet | ASTM A240 | — |
1.4462 / Duplex 2205 / F51 – The closest general alternative in terms of the balance between strength and corrosion resistance.
1.4410 / Super Duplex 2507 / F53 – An alternative for more severe chloride-containing and seawater environments where higher corrosion resistance is required.
1.4501 / Super Duplex / F55 – An alternative where high mechanical strength is required together with strong resistance to pitting and stress corrosion.
Carpenter Technology – 22Cr-13Ni-5Mn / Nitronic 50
BÖHLER – BÖHLER P511 / XM-19 / Nitronic 50
Note: The information contained in this datasheet is for informational purposes only; no liability is accepted.
