No.7 Finish has a high degree of reflectivity and a mirror-like appearance. A No. 4 finish that has been polished to 320-grit is buffed for up to 10 minutes but existing grit lines are not removed. The remnants of fine polishing lines can generally seen by an observer standing several feet from a panel.
No.8 Finish It is produced in the same manner as the No. 7 finish except that the buffing is continued for an additional five to ten minutes. In comparison to a No. 7 finish, the grit lines are much less visible, but they can be seen if the finish is examined closely. The resulting finish is mirror-like but not a perfect mirror.
MECHANICAL PROPERTIES FOR SS 317 / 317L SHEETS & PLATES
| Density | Melting Point | Tensile Strength | Yield Strength (0.2%Offset) | Elongation |
| 7.9 g/cm3 | 1400 °C (2550 °F) | Psi – 75000 , MPa – 515 | Psi – 30000 , MPa – 205 | 35 % |
SS 317/317L Sheets & Plates are tested during the time of manufacturing and we conduct strict quality checks through testings. The several tests we perform are flattering test, mechanical test, chemical test, pitting resistance test, micro & macro test, hardness test, positive material identification, flaring test, tensile test, etc.
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