Specification:
Material: Ck45(SAE1045)
Chemical composition (%) Mechanical properties
C Mn Si S P Tensile Yield Elongnation
0.40-0.50 0.60-0.60 0.035 0.035 0.035 630N/mm2 340N/mm2 16
Delivery conditions: Normalized
Tolerance on Dia.: ISO f7
Chrome thickness: Min. 20microns to 40 microns
Corrosion resistance: Min36 hours salt spray, test as per ISO 3769 or ASTM B 117
Straightness: Max. 0.2mm/meters
Ovality: Half of tolerance of f7
Surface Hardness: 850-1150HV (Vickers 100g) ≥60HRC
Surface roughness: Ra≤0.2microns and Rt≤2microns.
Size range: Metric, 6mm to 500mm

It can be directly used as piston rod in cylinder or gas cylinder and some industries such as hydraulicpneumatic dricing ,guide rail of textile printing and dyeing and printing machine