Shock absorber piston is made by powder pressing and sintering (Powder Metallurgy) technology.We will do the black steam oxidation and cover the outer diameter with PTFE film.Technical information:1.    Material: MPIF 35 FC - 0205           Equivalent material: DIN 30910 - Sint C102.    Chemical compositionDesignationFeCuCFC - 0205Balance1.5-3.9%0.3-0.6%3.    Hardness range: HRB 40 – 100 Before black oxidation (around 50 HRB) After black oxidation (around 85 HRB)4.    Density range: 6.3-6.9 g/cm³ 5.    Possible tolerance for ID: 0.03 mm, for OD: 0.05 mm6.    General tolerance: ISO 2768 – m7.    Degree of oxidation: 2-5%, thickness 0.003-0.005 mm Fe3O4 CodeTypeD1D2D3D4D5D8NH1H2H3H4hA1D01D02D03D04D05D06D07D08DW357PT136.235.91027.524.52.561489.20.025132021.6132021.62829.6DW607PT235.73482820.52.1618785.50.025111819.21819.226.327.5DW303PT135.1351029.525.52.8814.128.7111322.82422.623.83132.2DW082-11PT130.130824201.76147101819181926.527.9DW206-1PT130.0529.92824.521.22.46148100.021219.520.51219.520.52526DW207-1PT125.3524.9582017.51.8513.56101115.816.71115.816.721.522.5DW591PT132.1731.96824.521.22.46148100.021219.520.51219.520.52526DW523PT13029.94102.58139.513.421.823.2DW524PT13231.941038139.513.422.223.7DW522PT12524.9282810711.517.619Packing of shock absorber piston: 1.    Rolled by anti-rust kraft paper, 5 or 10 pcs per roller / Plastic blister packing2.    Neutral standard carton or to your choice3.    Wooden boxes or pallets Process flow of shock absorber piston:Powder mixing – Pressing – Sintering – Sizing – Ultrasonic cleaning – Steam oxidation – Oil impregnation – PTFE film encapsulation – Final inspection – Packing – Storage Quality control of shock absorber piston:Work instruction paper and pictures at each working positionProcess flow card with each tray (Fully traceability)Sampling inspection and routing inspectionTS:16949 5 tools: PPAP, APQP, FMEA, SPC, MSADimensional report as per your requirement by CMM, projector, etc