40crni steel chemical element - Carbon steels - Steel gbt 11251 25simn2mov grade. gbt 11251 35mn2 quenching and tempering steel. Application of GBT 11251 40Cr steel chemical element GBT 11251 40Cr steel chemical element is widely used in the landing gear,shaf,gear,solid rocket engine shell,bearings,dies,block and so on. en10083 3 34cr4 european standard steel Q345R Coil , gbt. zoosnet.netWe would like to show you a description here but the site wont allow us.