STRUCTURAL SHEET STAINLESS STEEL HAVING EXCELLENT WELD CORROSION RESISTANCE, AND ITS MAKING METHOD Russian patent published in 2014 - IPC C22C38/58 C21D8/02 

FIELD: metallurgy.

SUBSTANCE: sheet is made from steel containing the following, wt %: 0.01 to 0.03 C, 0.01 to 0.03 N, 0.10 to 0.40 Si, 1.5 to 2.5 Mn, 0.04 or less - P, 0.02 or less - S, 0.05 to 0.15 Al, 10 to 13 Cr, 0.5 to 1.0 Ni, 4×(C+N) or more and 0.3 or less - Ti, Fe and inevitable impurities are the rest; with that, V, Ca and O are controlled in inevitable impurities: 0.05 or less - V, 0.0030 or less - Ca and 0.0080 or less - O. A sheet has an assessment parameter of microstructure of a heat affected zone at welding F and processibility index FFV meeting F=Cr+2×Si+4×Ti-2×Ni-Mn-30×(C+N)≤11, and FFV=Cr+3×Si+16×Ti+Mo+2×Al-2×Mn-4×(Ni+Cu)-40×(C+N)+20×V≤9.0.

EFFECT: sheet can be made at low costs and with high manufacturing capability, and weld parts from the sheet have excellent corrosion resistance.

6 cl, 2 dwg, 2 tbl, 1 ex