... precision steel tube DIN2391Standard:DIN2391steel grade:ST35, ST37, ST42, ST45, ST52, ST54, 17Cr3, 20Cr4,CK10, CK22,CK45,C4 ... , hydraulic and pneumatic cylinder useMain steel grade:ST35, ST37, ST42, ST45, ST52, ST54, 17Cr3, 20Cr4,CK10, C10, C22, C45, ... )Elongation(%)Yield Point(MPa)≥1041063731033512335242052051054508430104102024535590455065208530173154564546305610760014355 precision steel tube DIN2391