Rubuta ci gaba don wannan sakin layi - Kamfanin ya gabatar da na'urar Crampton na farko a Faransa, kuma ya sami umarni daga ba kawai Chemin de Fer du Nord ba, har ma da Paris Orléans da Paris Lyon Railways. Rikicin kudi (da kuma juyin juya halin 1848
) ya haifar da koma bayan tattalin arziki, da kuma raguwar umarni na locomotive, yana karfafa kamfanin don fadadawa. Wani sabon samfuri shine samar da injunan juya. Wani kuma shi ne kera gadar ƙarfe, kuma a shekara ta 1852 kamfanin ya gina gadar ƙarfe ta farko a Faransa. Ginin, wanda aka gina na Seine a Asnières yana da tsawon mita. Duk da umarni mara kyau kamfanin ya fadada cikin sauri; a shekara ta 1856 fitar da hannun jari na biyu ya ninka babban birnin kamfanin, a wannan shekarar kudaden shiga na kamfanin ya kai francs miliyan 7. A cikin 1855 an faɗaɗa masana'antar kamfanin don saukar da ginin gadoji na baƙin ƙarfe. Ƙarin umarni don gadaje na ƙarfe sun fito ne daga Faransa, da ƙasashen waje, suna ba kamfanin aiki na shekaru da yawa, da ci gaba mai ɗorewa. Don ramawa game da rashin tabbas a cikin kasuwancin ginin locomotive, kamfanin ya fara samar da injunan tururi, da kuma ginin jirgi <unk> sayen babban jirgi a Nantes, kuma ya zama mai ba da jirgin ruwan Faransa.