hard chromium plated piston rod

chrome plated rod MATERIAL: steel CK45 CHEMICAL COMPOSITION (%C MnSiSP0.40-0.500.60-0.900.0350.0350.035 MECHANICAL PROPERTIESUTS Min Y.S. Min E % Min CHARPY impact testCONDITION630 N/mm2340 N/mm216NORMALISED600 N/mm2380 N/mm21741JHARDENED AND TEMPEREDDELIVERY CONDITION Ground and Chrome plated CHROME THICKNESS 20 TO 40 Micron SURFACE ROUGHNESSRa ≤0.2 Micron and Rt≤2 Micron TOLERANCES ON DIA ISO f7 on the diameter OVALITY Half of the tolerance ISO f7 STRAIGHTNESS ≤0.2mm/m SURFACE HARDNESS 850-1150HV (Vickers 100g) COHESION No crack, breaking or detaching after thermic shock (warming up at 300 celsius degrees and cooling in water) .POROSITY Test according to ISO1456/1458 and result valuation according to ISO 4540 rating 8-10 CORROSION RESISTANCE Test in natural salt spray according to ASTM B 117-36 hours Results evaluation according to ISO 4540 RATING 7-10. WELD ABILITY: Very good weld ability according to the common welding system.PACKING: Anti rust oil to be appred on material and each rod to be packed in steel box