Nickel – Bar Nickel 625, 718 and several specialty Nickel alloys are available for aerospace and industrial specifications and can be cut to length to customer requirements. Grade Size Grade: 718 Grade: 625 Thickness (inches) .125 in. through 15 in. Thickness (millimeters) 3.175 mm through 381.00 mm Technical Data Specifications Material Safety Data Sheet (MSDS)