Microstructure 0 5 10 15 20 25 30 35 40 0 5 10 15 20 25 30 35 A ustenite + m a rte nsite A ustenite M artensite + -ferrite m arte n site A usatenite + m arten site + -ferrite -ferrite A u sa ten ite + -ferrite N iequiva lent (% ) C r e q u iva le n t (% ) Cr eq = (Cr) + 2(Si) + 1.5(Mo) + 5(V) + 5.5(Al) + 1.75(Nb) + 1.5(Ti) + 0.75(W)= 21.37 Ni eq = (Ni) + (Co) + 0.5(Mn) + 0.3(Cu) + 25(N) + 30(C)= 33.514
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