Analysis on Relationship Between Tensile Property Parameters and Nil-ductility Transition Temperature of Crack Arrest Thick Steel Plate

Fifty four troops of of yield strength R_p0.2, tensile strength R_m, elongation A, reduction of area Z, yield ratio R_p0.2/R_m and nil-ductility transition temperature T_NDT of crack arrest thick steel plate were analyzed.Results indicate uniform plastic deformation decreases with the increasing of yield ratio and that the nil-ductility transition temperature T_NDT decreases with the increasing of uniform plastic deformation.