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inconel 718 is a gamma prime strengthened alloy with excellent mechanical properties at elevated temperatures, as well as cryogenic temperatures. suitable for temperatures upto around 1300°f. can be readily worked and age hardened.
excellent strength from -423°f to 1300°f (-253 °c to 705 °c). age hardenable and may be welded in fully aged condition, excellent oxidation resistance up to 1800°f (980 °c). typically sold in the solution annealed temper, but can be ordered aged, cold worked, or cold worked & aged.
because of its unique array of properties, alloy 718 is popular with a number of different critical industries and applications including:
gas turbine components
cryogenic storage tanks
jet engines
liquid fueled rocket motors and components
fasteners and instrumentation parts
nuclear fuel element spacers
hot extrusion tooling
down hole shafting and strength bolting
bestar steel is a supplier of alloy 718 in pipe, tube, sheet, plate, round bar, flat bar, forging stock, hexagon, wire, and extruded section.
chemical composition of nickel alloy 718
inconel | element, proportion by mass (%) | ||||||||||||||
ni | cr | fe | mo | nb & ta | co | mn | cu | al | ti | si | c | s | p | b | |
718 | 50.0–55.0 | 17.0–21.0 | balance | 2.8–3.3 | 4.75–5.5 | ≤1.0 | ≤0.35 | ≤0.3 | 0.2–0.8 | 0.65–1.15 | ≤0.35 | ≤0.08 | ≤0.015 | ≤0.015 | ≤0.006 |
mechanical properties
typical room temperature properties, 1800°f annealed condition
ultimate tensile strength, psi | .2% yield strength psi | elongation % | hardness rockwell b |
135,000 | 70,000 | 45 | 100 |
nickel alloy 718 and inconel® 718 standards
form | standard |
metal type | uns n07718 |
bar | astm b637 ams 5662 ams 5663 ams 5664 pwa 1009 pwa 1010 ge b50tf15 |
wire | ams 5832 |
sheet | astm b670 ams 5596 ams 5597 pwa 1033 ge b50tf14 astm b670 astm b637 |
plate | astm b670 ams 5596 ams 5597 pwa 1033 ge b50tf15 astm b670 astm b637 |
tube | ams 5589 ams 5590 |
pipe | ams 5589 ams 5590 |
forging | astm b637 ams 5562 ams 5663 ams 5664 pwa 1009 pwa 1010 ge b50tf15 |
weld wire | a5.14 ernifecr-2 |
din | 2.4668 |
