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

We’re here to help with those ‘hard to find’ steel grades.

All our steel specifications and grades are available with a cast and analysis certificate, 3.1 mill certificate or a certificate of conformity. Please request with our sales team when placing orders.

Our steel is supplied in accordance with our ISO 9001:2008 registration.  West Yorkshire Steel aim to satisfy the quality and delivery needs of our customers and we measure our performance by meeting customers’ requirements and work to continually improve the service that we provide. In order to achieve this, it is our policy to maintain an efficient and effective Quality Management System based upon the requirements of BS EN ISO 9001:2008. Our staff are appropriately trained in order to effectively implement the Quality Management System. The achievement of quality and continuous improvement is fundamental to all the steel products and services provided by us and are practiced by all employees as an integral part of their work.