Hydraulic Sylinder Hard Chrome Plated steel Rod and round bars

1.Chemical Composition

2.Mechancial Properties

3. Supply Condition 

    Ground  and  chrome plated

4. Chrome Thickness 

     20 to 30 micron

5. Surface Roughness

     Ra 0.2 micron (max)

6. Tolerance on DIA 

    ISO f7 on the diameter

7.Ovality

Half of the tolerance ISO f7

8. Straightness

   0.2/1000mm

9. Hardness of the chrome layer

   850-1150HV (vickers 100g)

10. Cohesion

   No cracks,breaking or detaching after thermic shock(warming up at 300 celsius degrees and cooling in water)

11. Porosity

     Test according to ISO 1456/1458 and result yaluation according to ISO 4540 rating 8-10

12. Corrosion Resistance 

     Test in natural salt spray according to ASTM B 117-72hours

     Results evaluation according to ISO 4540 RATING 7-10

13. Weldability 

      Good

14. Packing

     Anti rust oil to be applied on material and each rod to be packed in paper sleeve