International Standard Comparative

BSI No. :: UNS No.

British Standards Institution :: Unified Numbering Systems for Metals and Alloys


BSI Group, also known in its home market as the British Standards Institution (or BSI), is a multinational business services provider whose principal activity is the production of standards and the supply of standards-related services. BSI produces British Standards, and, as the UK’s National Standards Body, is also responsible for the UK publication, in English, of international and European standards. The Group now operates internationally in 150 countries.


The UNS for Metals and Alloys provides a means of correlating many internationally used metal and alloy numbering systems administered by societies, trade associations, and individual users and producers of metals and alloys. Jointly developed by ASTM International and the Society of Automotive Engineers (SAE), it provides the uniformity necessary for efficient indexing, record keeping, data storage and retrieval, and cross-referencing.

Comparative Table7


B/- Council for Building and Civil Engineering C/- Chemical and Health Council
E/- Engineering Council L/- British Electrotechnical Committee and Electrotechnical Council
M/- Multitechnics Council S/- Systems : Management And Environment T/- Disc
BS No.&title BS Grade UNS&etc Spec   BS No.&title BS Grade UNS&etc Spec
BS1449 Part1
40/30 ④1.0489

BS 1449 Part 2

321S31 S32100①A167-321
43/25 ④1.0044 347S31 S34700①A167-347
43/35 ④1.0550 403S17 S41008④1.4000
46/40 ④1.0556 405S17 S40500①AA176-405
50/35 ④1.0570 409S19 S40900④1.4512
50/45 ④1.8956 410S21 S41000①1.4006
60/55 ④1.8948 420S45 ④1.4028
40F30   430S17 S43000④1.4016
43F35   434S17 S43400④1.4118
46F40   BS 1452
Spec. for flake graphite cast iron
150 F12101①A126-A
50F45   180 ①A48
60F55   220 ①A126-B
68F62 ④1.8969 260 F12401
75F70 ④1.8976 300 F12801
  284S16 S20200 350 F13507
Part 2
Spec. for stainless and geat-resisiting steel plate, sheet and strip
301S21 S30100④A167-304L BS 1453
Spec. for filler materials for gas welding
A1 JIS Z3202
302S25 S30200 A2
304S11 S30403①A167-304L A3
304S15 ①A167-304 A4
304S16 ④1.4301 A5
304S31 S30400④1.4301 A6
305S19 S30500④1.4303 A7
309S24 S30900④1.4828 A32
310S24 S31000④1.4845 A33
315S16 ④1.4420 B1
316S11 S31603①A167-316L B2
316S13 ④1.4431 B3
316S31 S31600①A167-316 C1
316S33 ④1.4401 C2
317S12 S31703④1.4438 C2B
317S16 S31700④1.4449 C2C
320S31 ④1.4570 C3
320S33 ④1.4573 C4


⑤ BS ⑥ AFNOR ⑦ SS ⑧ Maker Brand

Register as a member of e-pipe Registration your Company Information.

Any more you don't have to wait Marketing Result.
Using our companies information management database - Open e'market. and Advertising,Operating activities.
With e-pipe, Make a New Business.