Honed Tube manufacturers Honed Tubes For Hydraulic Cylinders Steel Grade and Chemical Compositions: Steel GradeCSiMnPSA Steel nameSteel numbermaxmaxmaxmaxmaxmin E2151.02120.100.050.700.030.0250.025 E2351.03080.170.351.200.030.025- E3551.05800.220.551.600.030.025- Mechanical properties at room temperature Steel gradeMinimum values for the delivery condition Steel namesteel nubmer(+Cc)(+LCc)(+SR)(+Ad) (+N) NBK Rm MpaA %Rm MpaA %Rm MpaReH MpaA %Rm MpaA %Rm MpaReH Mpa A % http://www.steeltubeschina.com..../carbon-steel-tube/h