Stainless Steel Reference Chart

British Standard European Standard 303 S31 1.4305 304 S11 1.4307 304 S31 1.4301 316 S11 1.4404 316 S31 1.4401 316 TI 1.4571 320 S31 1.4571

British Standard European Standard 321 S31 1.4541 409 S19 1.4512 416 S21 1.4005 430 S17 1.4016 431 S29 1.4057 17-4PH 1.4542 F51 1.4462

Surface Finishes

BS	EN	Description
I	IE	Hot rolled, softened mechanically descaled
I	ID	Hot rolled,softened,pickled
2D	2D	Cold rolled,heat treated,pickled
2B	2B	Cold rolled, heat treated, pickled skin passed on bright rolls
BA	2R	Cold rolled, Bright annealed

Correlation between grit values, transverse Ra values in microns and the new abbreviations according to BS EN 10088

Grit Finish	Ra Microns	BS EN 10088	Description	Old Description
120	1.0 - 2.0	2G	Ground	3A
180	0.6 - 1.2	2J	Dull Polished or Brushed	3B or 4
240	0.5 - 1.0	2J	Dull Polished or Brushed	3B or 4
280	0.4 - 0.8	2J	Dull Polished or Brushed	3B or 4
240S Si - Carbide	0.15 - 0.4	2K	Satin Polish	5