There is description and chemical composition and physical properties as following:
No.8 No. 8 finish, the most reflective finish that is
commonly produced on sheet, is obtained by polishing
with successively finer abrasives and buffing extensively
with very fine rouges. The surface is essentially free
of grit lines from preliminary grinding operations.
No.8 finish is most widely used for architectural parts,
small mirrous and reflectors and for press plates.
| Specification | Steel Grade | C% | Si% | Mn% | P% | S% | Cr% | Ni% | Mo% | Ti% | OTHER |
| Max. | Max. | Max. | Max. | Max |
| ASTM | S30100 | 0.15 | 1 | 2 | 0.045 | 0.03 | 16.00-18.00 | 6.00-8.00 | | | N:0.10 Max |
| A240 | S30200 | 0.15 | 0.75 | 2 | 0.045 | 0.03 | 17.00-19.00 | 8.00-10.00 | | | N:0.10 Max |
| | S30400 | 0.08 | 0.75 | 2 | 0.045 | 0.03 | 18.00-20.00 | 8.00-10.5 | | | N:0.10 Max |
| | S30403 | 0.03 | 0.75 | 2 | 0.045 | 0.03 | 18.00-20.00 | 8.00-12.00 | | | N:0.10 Max |
| | S30908 | 0.08 | 0.75 | 2 | 0.045 | 0.03 | 22.00-24.00 | 12.00-15.00 | | | |
| | S31008 | 0.08 | 1.5 | 2 | 0.045 | 0.03 | 24.00-26.00 | 19.00-22.00 | | | |
| | S31600 | 0.08 | 0.75 | 2 | 0.045 | 0.03 | 16.00-18.00 | 10.00-14.00 | 2.00-3.00 | | N:0.10 Max |
| | S31603 | 0.03 | 0.75 | 2 | 0.045 | 0.03 | 16.00-18.00 | 10.00-14.00 | 2.00-3.00 | | N:0.10 Max |
| | S31700 | 0.08 | 0.75 | 2 | 0.045 | 0.03 | 18.00-20.00 | 11.00-15.00 | 3.00-4.00 | | N:0.10 Max |
| | S32100 | 0.08 | 0.75 | 2 | 0.045 | 0.03 | 17.00-19.00 | 9.00-12.00 | | 5*(C+N) Min. | N:0.10 Max |
| | 0.70 Max |
| | S34700 | 0.08 | 0.75 | 2 | 0.045 | 0.03 | 17.00-19.00 | 9.00-13.00 | | | Cb:10*CM in. |
| | 1.00 Max |
| | S40910 | 0.03 | 1 | 1 | 0.045 | 0.03 | 10.50-11.70 | 0.5Max | | | Ti:6*CMin. |
| | 0.5 Max. |
| | S41000 | 0.15 | 1 | 1 | 0.04 | 0.03 | 11.50-13.50 | 0.75Max | | | |
| | S43000 | 0.12 | 1 | 1 | 0.04 | 0.03 | 16.00-18.00 | 0.75Max | | | |
