{"id":3579,"date":"2026-09-16T11:02:53","date_gmt":"2026-09-16T08:02:53","guid":{"rendered":"https:\/\/www.defencemetal.com\/index.php\/en\/inconel-718\/"},"modified":"2026-09-25T16:25:56","modified_gmt":"2026-09-25T13:25:56","slug":"inconel-718","status":"publish","type":"page","link":"https:\/\/www.defencemetal.com\/index.php\/en\/inconel-718\/","title":{"rendered":"Inconel 718"},"content":{"rendered":"

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Inconel 718 \/ (2.4668) \/ UNS N07718 \/ AMS 5596 \/ AMS 5663<\/h1>\n
DEFENCE METAL<\/span><\/p>\n
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Inconel 718<\/div>\n
UNS N07718 \u00b7 W.Nr. 2.4668 \u00b7 NiCr19Fe19Nb5Mo3 \u00b7 50-55% Ni \u2013 17-21% Cr \u2013 4.75-5.50% Nb(+Ta) \u2013 2.80-3.30% Mo \u2013 0.65-1.15% Ti \u2013 0.20-0.80% Al \u2013 balance Fe<\/div>\n
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Not to be confused with<\/div>\n

Inconel 625<\/a>Waspaloy<\/a>Incoloy A286<\/a>Inconel X750<\/a><\/div>\n<\/div>\n

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For what<\/div>\n
Precipitation-hardening nickel-base superalloy. Bought for parts that need high yield and tensile strength together with stress-rupture strength up to about 650 \u00b0C and that also have to be fabricated by welding. Hardening comes from the \u03b3” (Ni\u2083Nb) precipitate;<\/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 supplied to order.<\/div>\n<\/div>\n
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Standards<\/div>\n
AMS 5662<\/b> \u2014 bars, forgings, rings; 968 \u00b0C (1775 \u00b0F) solution heat treated, NOT AGED (precipitation-hardenable). \u00b7 AMS 5663<\/b> \u2014 bars, forgings, rings and stock for forgings and rings; 968 \u00b0C (1775 \u00b0F) solution AND precipitation heat treated. \u00b7 AMS 5664<\/b> \u2014 bars, forgings, extrusions, rings; 1066 \u00b0C (1950 \u00b0F) solution heat treated, NOT AGED. \u00b7 AMS 5962<\/b> \u2014 round bars and wire; 968 \u00b0C (1775 \u00b0F) solution treated and work strengthened, precipitation-hardenable. \u00b7 AMS 5596<\/b> \u2014 sheet, strip, foil, plate; 968 \u00b0C (1775 \u00b0F) solution heat treated. \u00b7 AMS 5597<\/b> \u2014 sheet, strip, plate; 1066 \u00b0C (1950 \u00b0F) solution heat treated. \u00b7 AMS 5589<\/b> \u2014 seamless tubing; 968 \u00b0C (1775 \u00b0F) solution heat treated. \u00b7 AMS 5590<\/b> \u2014 seamless tubing; 1066 \u00b0C (1950 \u00b0F) solution heat treated. \u00b7 AMS 5832<\/b> \u2014 welding wire (equivalent to AWS A5.14 ERNiFeCr-2). \u00b7 ASTM B637 \/ ASME SB-637 \u2014 precipitation-hardening nickel alloy bars, forgings and rings. \u00b7 ASTM B670 \u2014 plate, sheet, strip. \u00b7 NACE MR0175 \/ ISO 15156-3 and API 6A718 \u2014 oil and gas sour service.
For this alloy the AMS numbers split by PRODUCT FORM and by HEAT TREATMENT CONDITION AS DELIVERED. Where one product form carries more than one number, the difference is the solution treatment temperature and\/or whether the material has been aged.<\/span><\/div>\n<\/div>\n
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Advantage<\/div>\n
Because \u03b3” (Ni\u2083Nb) precipitates slowly, the alloy resists post-weld strain-age cracking: a part can be welded and aged directly without an intermediate stress relief.<\/div>\n<\/div>\n
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Welding<\/div>\n
Filler metal: AWS A5.14 ERNiFeCr-2 (AMS 5832<\/b>), matching composition. No preheat required. Interpass temperature is held below about 100 \u00b0C (200 \u00b0F) and heat input is kept low. Welding is preferably done in the solution-treated condition;<\/div>\n<\/div>\n
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Limits<\/div>\n
The practical ceiling under long-term load is about 650 \u00b0C (1200 \u00b0F); manufacturer data sheets give a nominal service ceiling of 704 \u00b0C (1300 \u00b0F). Above that band the strengthening \u03b3” (Ni\u2083Nb) is unstable and transforms to the equilibrium \u03b4 (Ni\u2083Nb) phase;<\/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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