Inconel 718 vectis rotundus est nigel-chromium mixturae vectis cum usque ad 55% nickel in compositione. Contenta includunt 17% chromium, 4.9% niobium, 6.6% ferrum minimum, aluminium, boron, carbonem, cobaltum, aes, manganesum, phosphorum, plumbum, sulphur et pii. Materia vim tensilem ultimam habet 1375 MPa et minimum cedit robur 1100 MPa.