Inconel 718 round bar is a nickel-chromium alloy bar with up to 55% nickel in its composition. Contents include 17% chromium, 4.9% niobium, 6.6% iron minimum and aluminum, boron, carbon, cobalt, copper, manganese, phosphorus, lead, sulfur and silicon. The material has an ultimate tensile strength of 1375 MPa and a minimum yield strength of 1100 MPa.