Abstract: A method for manufacturing an Ni-Fe alloy sheet having an excellent DC magnetic property and an excellent AC magnetic property, which comprises the steps of:hot-working a material consisting essentially of:______________________________________ nickel from 76 to 81 wt. %, molybdenum from 3 to 5 wt. %, copper from 1.5 to 3.0 wt. %, boron from 0.0015 to 0.0050 wt. %, ______________________________________and the balance being iron and incidental impurities, to prepare an Ni-Fe alloy sheet; then subjecting the alloy sheet to a first cold-rolling at a reduction ratio of from 50 to 98%; then subjecting the alloy sheet to a first annealing in a temperature of from 780.degree. to 950.degree. C.; then subjecting the alloy sheet to a second cold-rolling at a reduction ratio of from 75 to 98%; and then subjecting the alloy sheet to a second annealing in a temperature of from 950.degree. to 1,200.degree. C.; thereby imparting an excellent DC magnetic property and an excellent AC magnetic property to the alloy sheet.

Abstract: A method for continuously electro-tinplating a metallic material comprising the steps of: using an acidic electro-tinplating solution containing phenolsulfonic acid or a salt thereof and tin ion, using an insoluble anode, and causing a DC electric current to flow between the insoluble anode and a metallic material, while replenishing the acidic electro-tinplating solution with tin ion, thereby forming a tinplating layer on the surface of the metallic material. The above-mentioned anode comprises an electric-conductive substrate, and a film comprising at least iridium oxide, formed on the surface of the electric-conductive substrate.