National Standards

Steel specifications are often prefixed with initials. This can indicate the originating 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