{"id":3535,"date":"2026-09-16T10:57:32","date_gmt":"2026-09-16T07:57:32","guid":{"rendered":"https:\/\/www.defencemetal.com\/index.php\/en\/nitronic-50\/"},"modified":"2026-09-25T16:25:03","modified_gmt":"2026-09-25T13:25:03","slug":"nitronic-50","status":"publish","type":"page","link":"https:\/\/www.defencemetal.com\/index.php\/en\/nitronic-50\/","title":{"rendered":"Nitronic 50 \/ (1.3964) \/ AMS 5764"},"content":{"rendered":"

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Nitronic 50 \/ (1.3964) \/ UNS S20910 \/ AMS 5764<\/h1>\n
DEFENCE METAL<\/span><\/p>\n
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Nitronic 50<\/div>\n
UNS S20910 \u00b7 ASTM XM-19 \u00b7 W.Nr. 1.3964 (SEW 390) \u00b7 trade names: Nitronic 50, Alloy 50, Fermonic 50, 22-13-5 \u00b7 ASTM composition: 20.5-23.5% Cr \u2013 11.5-13.5% Ni \u2013 4.0-6.0% Mn \u2013 1.50-3.00% Mo \u2013 0.20-0.40% N \u2013 0.10-0.30% Nb \u2013 0.10-0.30% V \u2013 C \u2264 0.06% \u2013 balance Fe. It is a NITROGEN-STRENGTHENED austenitic stainless steel: produced by SOLUTION ANNEALING + RAPID COOLING, NOT PRECIPITATION HARDENABLE and not aged; additional strength comes from COLD OR WARM WORK.<\/div>\n
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Not to be confused with<\/div>\n

AISI 316L<\/a><\/div>\n<\/div>\n

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For what<\/div>\n
Bought for parts where the strength of 304 and 316 is not enough and corrosion resistance in chloride or seawater service is wanted at the same time: pump and boat shafts, valve stems, fasteners, subsea and offshore hardware, drilling equipment.<\/div>\n<\/div>\n
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Forms<\/div>\n
Round bar \u00b7 flat bar \u00b7 plate \u00b7 sheet \u00b7 pipe and tube \u00b7 forging. All forms supplied to order.<\/div>\n<\/div>\n
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Standards<\/div>\n
AMS 5764<\/b> (bars, forgings and rings). ASTM: A276 (XM-19, bar and shapes) \u00b7 A479 \/ SA-479 (bar and shapes for boilers and pressure vessels, S20910) \u00b7 A182 \/ SA-182 (forged flanges, fittings and valve parts, F XM-19) \u00b7 A312 \/ SA-312 (seamless and welded pipe, TP XM-19) \u00b7 A314 (billets and bars for forging) \u00b7 A193 Gr B8R and B8RA (bolts and studs) \u00b7 A194 Gr 8R and 8RA (nuts). WELDING CONSUMABLES: AWS A5.9 ER209 (wire), AWS A5.4 E209 (covered electrode). Sour service: NACE MR0175 \/ ISO 15156-3. EN\/SEW: 1.3964 (SEW 390).
1) W.Nr. 1.3964 IS AN APPROXIMATE EQUIVALENT, NOT THE SAME MATERIAL. Metalcor’s 1.3964 datasheet gives 15.0-17.0% nickel and 3.00-3.50% molybdenum; ASTM XM-19 (S20910) calls for 11.5-13.5% nickel and 1.50-3.00% molybdenum.<\/span><\/div>\n<\/div>\n
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Advantage<\/div>\n
Roughly twice the yield strength of 304 and 316 in the same table. The ASTM A479 annealed bar minimums give 690 MPa tensile and 380 MPa yield for S20910, while THE SAME TABLE gives 515 MPa tensile and 205 MPa yield for 304 and 316; on yield the ratio is 1.85.<\/div>\n<\/div>\n
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Welding<\/div>\n
It is weldable. CONSUMABLES: AWS A5.9 ER209 wire and AWS A5.4 E209 covered electrode \u2014 these are the matching nitrogen-bearing austenitic consumables for XM-19; an XM-19 joint welded with 308\/316 consumables will have weld strength below that of the parent metal.<\/div>\n<\/div>\n
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Limits<\/div>\n
1) THE HS AND SHS CONDITIONS ARE NOT PRECIPITATION HARDENING. Langley Alloys states it plainly: ‘annealed bars are solution treated and water quenched, and high-strength bars are COLD OR WARM WORKED to reach their strength’.<\/div>\n<\/div>\n
REQUEST A QUOTE<\/a>All stainless steels →<\/a>TECHNICAL DETAILS ↓<\/span><\/div>\n
Compiled from manufacturer data sheets \u00b7 confirm against the current specification before ordering<\/div>\n<\/div>\n<\/div>\n

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