EN 10020:2000

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

This European Standard defines the term "steel" (see clause 2) and classifies steel grades into: - non alloy, stainless steel and other alloy steels by chemical composition (see clause 3); - main quality classes (see clause 4) defined by main property or application characteristics for non alloy, stainless and other alloy steels.