Hollow Chrome Plated Bar ST52.3/CK45/SAE4140Steel Grade:CK45/S45/SAE1045,SAE4140/ SCM440/42CrMo4,17-4PH,AISI630,ST52.3,16Mn,20Mn,27SiMn,E355,AISI431,SS304/316Type: hollow steel bar, tempered, induction hardenedMetric ODSize: 6 mm 1000 mmInch ODSize: OD 1/4" to 50".Hard Chrome PlateThickness: 15,20,25,30 Micron (or according to customer's request)Surface Roughness:Ra < 0.4OD Tolerance: ISO f7,f8,H7,H8Ovality: half of the OD toleranceStraightness: <0.2 mm/mSalt Spray Test: ASTM B117-72hours/96hours,results evaluation refers to ISO4540,Level 9.Package:anti rust oil on material and packed first bycardboardsleevethen insteel framebox.We can supply machining survice according to detailed draft and other technic request can be disscussed.Welcome to send email to us for further cooperation.Company InformationOur ServicesPackaging & ShippingContact information