{"id":3581,"date":"2026-09-16T11:03:00","date_gmt":"2026-09-16T08:03:00","guid":{"rendered":"https:\/\/www.defencemetal.com\/index.php\/en\/inconel-625\/"},"modified":"2026-09-25T16:24:38","modified_gmt":"2026-09-25T13:24:38","slug":"inconel-625","status":"publish","type":"page","link":"https:\/\/www.defencemetal.com\/index.php\/en\/inconel-625\/","title":{"rendered":"Inconel 625"},"content":{"rendered":"

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Inconel 625 \/ (2.4856) \/ UNS N06625 \/ AMS 5599 \/ AMS 5666<\/h1>\n
DEFENCE METAL<\/span><\/p>\n
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Inconel 625<\/div>\n
UNS N06625 \u00b7 W.Nr. 2.4856 \u00b7 NiCr22Mo9Nb (EN) \u00b7 ISO NW6625 \u00b7 58% min Ni \u2013 20-23% Cr \u2013 8-10% Mo \u2013 3.15-4.15% Nb(+Ta) \u2013 5% max Fe \u2013 0.10% max C<\/div>\n
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Not to be confused with<\/div>\n

AISI 316L<\/a>Inconel 718<\/a>Hastelloy X<\/a>Haynes 25<\/a>Inconel 600<\/a><\/div>\n<\/div>\n

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For what<\/div>\n
A nickel-base SOLID-SOLUTION alloy. Its strength comes from the stiffening effect of molybdenum and niobium on the nickel-chromium matrix; no precipitation-hardening cycle is applied and none is required.<\/div>\n<\/div>\n
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Forms<\/div>\n
Round bar \u00b7 flat bar \u00b7 plate \u00b7 sheet \u00b7 tube \u00b7 forging. All forms are supplied to order.<\/div>\n<\/div>\n
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Standards<\/div>\n
AMS 5599<\/b> \u2014 sheet, strip, plate; ANNEALED (Grade 1 branch). \u00b7 AMS 5869<\/b> \u2014 sheet, strip, plate; SOLUTION HEAT TREATED (Grade 2 branch). \u00b7 AMS 5879<\/b> \u2014 sheet, strip, foil; cold rolled and annealed (does not cover plate). \u00b7 AMS 5666<\/b> \u2014 bars, forgings, extrusions, rings and stock for forgings, extrusions and rings; ANNEALED. \u00b7 AMS 5581<\/b> \u2014 seamless or welded tubing; ANNEALED. \u00b7 AMS 5837<\/b> \u2014 welding wire (equivalent to AWS A5.14 ERNiCrMo-3). \u00b7 ASTM B443 \/ ASME SB-443 \u2014 plate, sheet, strip; Grade 1 and Grade 2. \u00b7 ASTM B446 \/ ASME SB-446 \u2014 rod and bar; Grade 1 and Grade 2. \u00b7 ASTM B564 \/ ASME SB-564 \u2014 forgings. \u00b7 ASTM B444 \/ ASME SB-444 (+ B829) \u2014 seamless pipe and tube; Grade 1 and Grade 2. \u00b7 ASTM B704 \/ ASME SB-704 \u2014 welded tube. \u00b7 ASTM B705 \/ ASME SB-705 \u2014 welded pipe. \u00b7 ASTM B366 \/ ASME SB-366 \u2014 factory-made wrought fittings. \u00b7 DIN 17750 (sheet\/plate) \u00b7 DIN 17752 (rod and bar) \u00b7 DIN 17753 (wire) \u00b7 DIN 17754 (forgings) \u00b7 ISO 6207 \/ 6208 \/ 9723 \/ 9724 \/ 9725 \u00b7 VdT\u00dcV 499 \u00b7 NACE MR0175 \/ ISO 15156-3 (sour service).
The AMS numbers split by product form AND by annealing class; an order must state both. Grade 1 (annealed) branch: AMS 5599 \u00b7 AMS 5879 \u00b7 AMS 5666 \u00b7 AMS 5581. Grade 2 (solution heat treated) branch: AMS 5869.<\/span><\/div>\n<\/div>\n
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Advantage<\/div>\n
Without any precipitation-hardening cycle, the annealed material meets a specification minimum of 827 MPa tensile \/ 414 MPa yield (ASTM B443\/B446\/B444 Grade 1) \u2014 a yield level more than double that of austenitic stainless steels \u2014 while at the same time being practically immune to chloride-induced\u2026<\/div>\n<\/div>\n
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Welding<\/div>\n
Filler metal: AWS A5.14 ERNiCrMo-3 (AMS 5837<\/b>; UNS N06625) \u2014 matching composition. Covered electrode: AWS A5.11 ENiCrMo-3 (UNS W86112, INCONEL Welding Electrode 112). ASME Section IX base metal grouping: P-No 43 (nonferrous P-Numbers carry no Group Number); filler metal F-No 43.<\/div>\n<\/div>\n
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Limits<\/div>\n
1) Long-term intermediate-temperature exposure: held for long periods in the intermediate temperature band, annealed 625 suffers a severe loss of room-temperature impact strength. The mechanism is precipitation of \u03b3” (Ni\u2083Nb) and \u03b4 (orthorhombic Ni\u2083Nb) together with M23C6\/M6C carbides on the grain boundaries.<\/div>\n<\/div>\n
REQUEST A QUOTE<\/a>All nickel alloys →<\/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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