Chemically, elements such as manganese, silicon, sulfur, phosphorus, copper, columbium, chromium, carbon, cobalt, molybdenum, niobium, tantalum, titanium, aluminum, iron, nickel, boron, etc. must comply with the normative standard ASTM B670. According to the ASTM B670 specification, Inconel 718 Din 2.4668 Polished Plates must also consider tensile strength, yield strength and elongation requirements. In addition, Alloy 718 Nickel Gasket Stock is required to be stress-rupture tested according to the ASTM document itemized here.