Inconel 718 Chemical composition
Alloy % Ni Cr Fe Mo Nb
Co C Mn Si S Cu Al
Ti
718 Min. 50 17 balance
2.8 4.75
0.2 0.7
Max. 55 21 3.3
5.5 1 0.08 0.35 0.35 0.01
0.3 0.8 1.15
Inconel 718 Physical properties
Density 8.2 g/cm³
Melting point 1260-1340 ℃ Inconel 718 Alloy minimum
mechanical properties in the
roomtemperature
Alloy Tensile strength Rm N/mm²
Yield strength R P0. 2N/mm²
Elongation A 5 % Brinell
hardness
HB
Solution treatment 965 550 30
≤363
718 Characteristic as below： 1.workability
2.High tensile strength, endurance
strength, creep strength and
rupture strength at 700℃. 3.High inoxidability
at1000℃.4.Steady mechanical
performance in the low
temperature. 5.Good welding performance. Inconel 718 Metallurgical
structure
718alloy is Austenitic structure, precipitation hardening generate
"γ" made it excellent mechanical
performance. G rain boundary
generate "δ" made it the best
plasticity in the heat treatment.
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