Abstract: Provided is a clad steel plate with excellent thermal conductivity that can be used suitably in cookware and the like. The present invention is a three-layer clad steel plate having a carbon steel base material and stainless steel mating material disposed respectively on both surface sides of the base material, wherein a plate thickness ratio L given by Equation (1) is 1.0-5.0 and at least one surface of the clad steel plate has a plurality of protrusions and recesses. Plate thickness ratio L=the plate thickness of the base material/the total thickness of the mating material . . . Equation (1) Here, the base material thickness and the mating material thickness are the thicknesses at the protrusions.

Abstract: Provided is a clad steel plate with excellent thermal conductivity that can be used suitably in cookware and the like. The present invention is a three-layer clad steel plate having a carbon steel base material and stainless steel mating material disposed respectively on both surface sides of the base material, wherein a plate thickness ratio L given by Equation (1) is 1.0-5.0 and at least one surface of the clad steel plate has a plurality of protrusions and recesses. Plate thickness ratio L=the plate thickness of the base material/the total thickness of the mating material . . . Equation (1) Here, the base material thickness and the mating material thickness are the thicknesses at the protrusions.

Abstract: When a metastable austenitic stainless steel strip with a value Md(N), which is calculated from a composition, of 20–100 is ring-rolled to a steel belt, the relationship of ?0.3913T+0.5650Md(N)+60.46??65.87 is established among a material temperature T, an equivalent strain ? and the value Md(N). Due to the controlled rolling, a stainless steel belt for a continuously variable transmission is bestowed with fatigue properties similar or superior to those of a 18%-Ni maraging steel belt. The value Md(N) is defined by the equation of Md(N)=580?520C?2Si?16Mn?16Cr?23Ni?300N?10Mo, and the equivalent strain ? is defined by the equation of ?=?{square root over (4(1n(1?R))2/3)} (R: reduction). Furthermore, the steel belt is stabilized in its quality and profile by confining a variation ?T of the material temperature T within a range of ±6.4° C.

Abstract: When a metastable austenitic stainless steel strip with a value Md(N), which is calculated from a composition, of 20-100 is ring-rolled to a steel belt, the relationship of −0.3913T+0.5650Md(N)+60.46&egr;≧65.87 is established among a material temperature T, an equivalent strain &egr; and the value Md(N). Due to the controlled rolling, a stainless steel belt for a continuously variable transmission is bestowed with fatigue properties similar or superior to those of a 18%-Ni maraging steel belt. The value Md(N) is defined by the equation of Md(N)=580−520C−2Si−16Mn−16Cr−23Ni−300N−10Mo, and the equivalent strain &egr; is defined by the equation of E={square root}{square root over (4(1n(1−R))2/3)} (R: reduction). Furthermore, the steel belt is stabilized in its quality and profile by confining a variation &Dgr;T of the material temperature T within a range of ±6.4° C.