Abstract: A method of determining a composition of a steel alloy includes minimizing a presence of AlN by satisfying the following condition: Al×N<5×103 (weight %), minimizing a formation of cementite by satisfying the following condition: Si+Al>4×C (weight %), wherein an Al content is selected in a range of 0.05 to 3.00 in weight %, wherein a N content is selected in a range of 0.001-0.025 in weight %, wherein a Si content is selected in a range of 0.25-4.00 in weight %, wherein a C content is selected in a range of 0.1-0.70 in weight %.

Abstract: A low alloy high-strength carbide-free bainitic steel for producing strips, sheets and pipes is disclosed with the following chemical composition (in weight %) 0.10-0.70 C, 0.25-4.00 Si, 0.05-3.00 Al, 1.00-3.00 Mn, 0.10-2.00 Cr, 0.001-0.50 Nb, 0.001-0.025 N, max 0.15 P, max 0.05 S, remainder iron and steel tramp elements with optional addition of one or more elements of Mo, Ni, Co, W, Nb, Ti, or V and Zr and rare earths with the proviso the for avoiding primary precipitations of AlN the condition Al×N<5×10?3 (weight %) and for suppressing the cementite formation the condition Si+Al>4×C (weight %) are satisfied.