Surface Finish
Catalog and homepage finishes are No.1, 2B, BA, mirror, No.4, HL and 8K. The homepage also states surface roughness of Ra ≤ 0.8 μm and salt-spray resistance of more than 2,000 hours for the precision range.
- No.1: hot-rolled, annealed and pickled. The usual plate finish.
- 2B: cold-rolled, annealed, pickled and skin-passed. The common sheet and coil finish.
- BA: bright annealed, smoother and more reflective than 2B.
- No.4 and HL: directional brushed finishes used for visible panels.
- 8K: mirror polish and drawing. The brochure describes a smooth surface without visible trace.
The five finishes above use common industry definitions for the catalog names. They are not a separate test report.
