roughness for both No. 3 and No. 4 finishes. Surface finish in fabrication Average Ra µm Bead blasted 1.00-6.00 Bored, turned 0.40-6.00 Electropolished 0.10-0.80 It should be noted that the values in the table are for orientation only and that they vary between different producers and typical surface finish.
Stainless Steel - Harbor Steelused for press plates, as well as for small mirrors and reflectors. *Standard stock polished finish is between 100-180 Grit (#3 to #4). Type 303 C Mn PSSi Cr Ni 0.15 2.00 0.20 0.15 1.00 17.00 8.00 Max. Max. Max. Min. Max. 19.00 10.00 Type 303 is a chromium-nickel stainless steel modified by the addition of selenium or sulphur, as well as
Stainless Steel Plate - Product Stocking and Processing Stainless Steel Plate:Grade:304/304L, 316/316L, 4003/AtlasCR12, 2205, 253MA:Thickness (mm) 5.0 to 50.0:Width (mm) 1250 (grade 4003), 1500, 2000, 2500:Length (mm) 3000, 6000, Customer specific cut-to-length:Finish:2B (to 8mm), No.1 (HRAP) Plasma profiles:To customer drawings