National Standards
Steel blueprint are about prefixed with initials. This can announce the basic country of the grade.
| Specification Prefix | Country of Origin |
|---|---|
| AS | Australia |
| ONORM | Austria |
| NBN | Belgium |
| BDS | China |
| GB | Canada |
| CSA | Slovak/Czech Republic |
| CSN | Finland |
| AFNOR | France |
| DIN | Germany |
| BS | United Kingdom |
| MSZ | Hungary |
| UNI | Italy |
| JIS | Japan |
| NS | Norway |
| PN | Poland |
| STAS | Romania |
| GOST | Russia |
| SS | Sweden |
| UNE | Spain |
| SNV / VSM | Switzerland |
| AISI, AMS, ASME, SAE, UNS | United States |
| EN (Euronorm) | European |
