4 Apparatus4.1 Constant-elongation measurements4.1.1 Straining device, consisting of a metal rod or other suitable guide fitted with pairs of holders, onefixed and one moveable, for the ends of the test piece. The holders shall be in the form of self-tighteningclamps for strip test pieces, in the form of jaws to hold tab (enlarged) ends, and … Continue reading ISO 2285 Determination Of Tension Set Under Constant Elongation, and of Tension Set, Elongation and Creep Under Constant Tensile Load- Testing Fixtures