UNI EN 10020 : 2001

Foreword
1 Scope
2 Term and definition
3 Classification by chemical composition
      3.1 Applicable alloy contents
      3.2 Definition of classes
             3.2.1 Non alloy steels
             3.2.2 Stainless steels
             3.2.3 Other alloy steels
4 Classification of main quality classes
      4.1 Non alloy steels
             4.1.1 Non alloy quality steels
             4.1.2 Non alloy special steels
      4.2 Stainless steels
      4.3 Other alloy steels
             4.3.1 Alloy quality steels
             4.3.2 Alloy special steels