Nitronic 50 / XM-19 Round Bars Supplier, Stockist & Exporter in India.

Role of the key elements: nitrogen is the main strengthener and adds 16x its content to PREN; manganese holds the austenite and raises nitrogen solubility; chromium and molybdenum give passivity and chloride resistance; niobium and vanadium refine grain and tie up carbon.

Annealed bar (ASTM A276 / A479 minimums)

Nitronic 50HS (strain-hardened, Condition S) – minimums by diameter  

Do not publish 50HS numbers from memory or from other websites: pick the ASTM A276 Condition S / A479 values your mill certificates are issued to, and quote only those.

Elevated-temperature typical tensile (keep existing table if mill data is available) 

Nitronic 50 forms a stable chromium-rich passive film strengthened by molybdenum and nitrogen. Its PREN (about 29-40, typically 34) puts pitting and crevice resistance above 316L and 317L and in the range of 2205 duplex.

Sour service. In wet hydrogen sulfide environments, atomic hydrogen enters ordinary steels and causes sulfide stress cracking. XM-19 is listed in NACE MR0175 / ISO 15156-3 for oilfield equipment, with a 35 HRC maximum hardness for annealed and hot-rolled bar, because nitrogen and manganese, not carbon, carry its strength. Hardness is surveyed on the heat before release. Above the sulfide and temperature limits of the standard, move to a duplex or super duplex grade.

See our Nitronic 60 round bars.

• Welding: weldable by GTAW, GMAW, SMAW, SAW and FCAW. Use matching ER209 / E209 (Nitronic 50W) filler; 316L or 308L filler gives an undermatched weld. Pure argon shielding, no preheat in normal sections, interpass below about 150 C. Alloy 625 filler (ERNiCrMo-3) is an option for dissimilar joints.
• Post-weld heat treatment: not normally required; for code work, solution anneal at about 1065-1120 C with water quench restores full properties. 
• Machining: about 20-25% of free-machining steel. It work-hardens quickly: rigid set-ups, sharp coated carbide (TiAlN/TiCN), positive feed (0.005-0.012 in/rev), flood coolant, no light rubbing passes. Machine in the annealed condition where possible; 50HS needs lower speeds and more tool changes.
• Forging: 1175-1205 C start, then solution anneal.

Stock lengths 3 m and 6 m; cut-to-size available. Ex-stock 5-200 mm; larger diameters, 50HS and forged bar on 2-4 weeks  

Formula: kg/m = 0.0061968 x diameter (mm) squared, from density 7.89 g/cm3. For other sizes use our metal weight calculator.

Every lot is traceable to its heat number. Available on request: EN 10204 3.1 mill test certificate, 3.2 third-party inspection (SGS, Bureau Veritas, Intertek, TUV), chemical analysis (ASTM A751), tension test (A370), hardness check against the NACE 35 HRC limit, intergranular corrosion test (ASTM A262 Practice E), positive material identification, dimensional and straightness checks, ultrasonic testing for forged bar. See our Quality and Certificate pages. Add a sample redacted MTC image here.

Nitronic 50 is priced per kg and follows nickel, molybdenum, chromium, niobium and vanadium surcharges, plus diameter, condition (annealed or 50HS), finish, quantity, certificates and Incoterm. Send diameter, length, quantity, condition, MTC type and destination for a same-day quotation.

• Oil & gas: downhole tool bodies, non-magnetic drill collar and MWD housings, sour-service bolting, pump shafts and valve stems.
• Marine & offshore: propeller and pump shafting, rudder stocks, subsea connector bodies, marine fasteners.
• Chemical & pulp processing: agitator shafts, pump impellers, valve bodies and fasteners in chloride and oxidising acid service.
• Cryogenic & LNG: valve bodies, pump shafts and supports down to -196 C.
• High-strength fasteners: studs, bolts and nuts to ASTM A193 / A194 blanks, chains and cable fittings.
• Medical & instrumentation (non-magnetic): instrument shafting and sensor housings; confirm medical-device requirements with your regulator.
• Aerospace & defence: hydraulic components and fasteners, with AMS 5764 documentation.

• Gulf (UAE, Saudi Arabia, Qatar, Kuwait, Oman, Bahrain): oil & gas, petrochemical and desalination sectors specify XM-19 for non-magnetic downhole parts, pump shafts and sour-service bolting. We provide product documents for SABER and ESMA import Arabic MTCs on request.
• Asia (Singapore, Malaysia, South Korea, Japan, Taiwan, China): offshore, LNG, chemical and semiconductor equipment makers use it where 316L is too weak. Third-party inspection by accredited bodies on request.
• Europe (Germany, Italy, UK, Netherlands, France, Norway): supplied with Werkstoff Nr. 1.3964 documentation, EN 10204 3.1/3.2, REACH statement and PED material certification; DAP/DDP to Rotterdam, Hamburg, Antwerp, Tilbury and Genoa .
• Africa and India: shipments to Mombasa, Durban, Cape Town and across India with GST documentation; ready Mumbai stock.

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