53 lines
4.0 KiB
Markdown
53 lines
4.0 KiB
Markdown
 
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[Download](https://presentations-decks-uploads-prod.s3.amazonaws.com/7403838/3888537/12414a9d77c0e8922332cee99c8836e36d7746ccda751d87f542742c6a6e80bf.pdf?X-Amz-Algorithm=AWS4-HMAC-SHA256&X-Amz-Date=20260910T074626Z&X-Amz-SignedHeaders=host&X-Amz-Expires=60&X-Amz-Credential=AKIAZ32RUKUMSNCVYAKB%2F20260910%2Fus-east-1%2Fs3%2Faws4_request&X-Amz-Signature=d38ee3ee79ae440a58c93667816572b64134f9419059e2abe0f290894ab91842)
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This data sheet contains approximate values that may vary with build conditions and is intended for reference and comparison purposes only. It should not be used for
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design specifications or quality control. The performance characteristics of the material can be affected (±) by, but are not limited to, part design, part geometries,
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application and operating conditions. Each user is responsible for determining that the material is safe, lawful and technica lly suitable for the intended laws and
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regulations. A DDITIVA makes no warranties of any kind, express or implied, including, but not limited to, the warranties of merchantability, fitness for a particular use, or
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warranty against patent infringement. ADDITIVA excludes liability, however arising, for any inac curacies in this document.
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ADDITIVA\_INCONEL718\_rev006.docx
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INCONEL® alloy 718 is a high \- strength, corrosion \- resistant nickel \- chromium material. Similar to its sister alloy 625,
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Inconel 718 is an age \- hardened version of alloy 625. Ageing (or precipitation hardening) produces precipitates within
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the microstructure t hat pin the metal's grains in place. As a result, the material typically becomes significantly
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stronger. Service temperatures range from \- 196°C to 700°C (\- 321°F to 1.300°F). Its welding characteristics, especially
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its resistance to post \- weld cracking, are outstanding. Good tensile, fatigue, creep, and rupture strengths have led to its
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use in a wide range of applications. The alloy is utilised in jet engines, liquid \- fuelled rockets, rings, casings, and metal
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parts for aircraft and land \- based gas turbine engi nes, cryogenic tankage, and high \- temperature fasteners. INCONEL
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718 is also employed in the oil and gas drilling and production industries due to its high strength and resistance to
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chlorides, stress corrosion, and sulphide stress cracking. Parts can be ma chined, welded, shot \- peened, polished, and
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coated.
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UNS AMS ASTM DIN
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N07718 5596 \- 5832 B670 – F3055 2.4668
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Chemical composition Physical properties
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Ni – Nickel 50.0÷55.0% Relative density Approx. 99.9%
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Cr – Chromium 17.0÷21.0% Density 8.15 g/cm 3
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Nb – Niobium 4.7÷5.5% Heat Treatment (AMS 5662)
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Mo – Molybdenum 2.8÷3.3% STEP 1 – Annealing
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Ti – Titanium 0.6÷1.2% 20°C → 980°C \-
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Al – Aluminium 0.2÷0.8% 980°C 1 hour
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Co – Cobalt ≤ 1.0% 980°C → 20°C \-
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Cu – Copper ≤ 0.3% STEP 2 – Ageing
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C – Carbon ≤ 0.08% 20°C → 720°C \-
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Mn – Manganese ≤ 0.35% 720°C 8 hours
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Si – Silicon ≤ 0.35% 720°C → 620°C 2 hours
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P – Phosphorus ≤ 0.015% 620°C 10 hours
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S – Sulfur ≤ 0.015% 620°C → 20°C \-
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Technical data
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Typical part accuracy (quote < 150 mm) ± 0.2/0.3 mm
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Typical part accuracy (quote ≥ 150 mm) ± 0.05mm each 25mm
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Surface roughness (as built) Ra: 5 ÷ 9 µm
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Surface roughness (after machining / polishing) Ra < 1.6 µm
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Mechanical properties
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Mechanical data Test method As Built Heat Treated AMS 5662
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Tensile strenght ISO 6892 \- 1:2009(B) Annex D 1020 ± 15 MPa 1.400 ± 15 MPa
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Yield strenght (Rp 0.2%) ISO 6892 \- 1:2009(B) Annex D 630 ± 15 MPa 1.1 4 0 ± 15 MPa
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Elongation at break ISO 6892 \- 1:2009(B) Annex D 30 ± 5 % 10 ± 2%
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Young’s modulus 1 85 ± 1 0 GPa 210 ± 1 0 GPa
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Hardness DIN EN ISO 6508 \- 1 30 HRC 46 HRC
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Thermal properties
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Maximum long \- term operating temperature Approx. 700°C / 1.300 °F
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Thermal conductivity 6 ÷ 12 W/mK
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