STAINLESS STEEL OF HIGH CONDUCTANCE AND PLASTICITY FOR USE IN FUEL ELEMENT AND METHOD OF ITS PRODUCTION Russian patent published in 2014 - IPC C22C38/28 C22C38/26 C21D9/46 H01M8/02 

FIELD: metallurgy.

SUBSTANCE: invention relates to metallurgy, particularly, to production of stainless steel sheet for fuel element separator. Said steel contains the following substances, in wt %: C: 001 or less, Si: 1.0 or less, Mn: 1.0 or less, S: 0.01 or less, P: 0.05 or less, Al: 0.20 or less, N: 0.02 or less, Cr: 20-40, Mo: 4.0 or less and at least one element selected from Nb, Ti, and Zr: 0.05-0.60 on the whole, Fe and unavoidable impurities making the rest. Cold-rolled sheet 200 mcm in depth or less is cooled at cooling rate adjustment R (°C/c) depending upon steel sheet depth t (mcm) to at least 500°C after annealing so that cooling rate R satisfies the formula: -17,27×ln(t)+92≤R≤70; per 100 mcm² at least island exists with equivalent circle diameter of 0.1 mcm of larger while sheet depth t (mcm) to-maximum diameter Dmax of said island satisfies the following formula: 20≤t/D_max.

EFFECT: high conductance and plasticity.

2 cl, 2 dwg, 2 tbl, 1 ex