... crane, coal mine hydraulic pressure support which were widely used in workshop, the general construction and each kind of project machinery ... ,15MnVN,16Mn,15MnVGB1591Q295(A,B),Q345(A,B,C,D,E)GB1591SM520(B,C),SM570JISG3106St44-3,St37-2,St52-3,St50 ... ,St70-2DIN17100StE315,StE355,StE380BS4360StE420,StE460,StE500,StE520 A572(Gr42,50,55,60,65), ISO4950-2S275(JR,J0,J2,J2G3,J2G4)EN10025S355(JR ...