NBN EN 10297-1 : 2003

Foreword
1 Scope
2 Normative references
3 Terms and definitions
4 Symbols
5 Classification and designation
   5.1 Classification
   5.2 Designation
6 Information to be supplied by the purchaser
   6.1 Mandatory information
   6.2 Options
   6.3 Example of an order
7 Manufacturing process
   7.1 Steelmaking process
   7.2 Deoxidation process
   7.3 Tube manufacture and delivery conditions
8 Requirements
   8.1 General
   8.2 Chemical composition
   8.3 Mechanical properties
   8.4 Hardness requirements
   8.5 Hardenability
   8.6 Appearance and soundness
   8.7 Straightness
   8.8 End preparation
   8.9 Dimensions, masses, tolerances and sectional properties
9 Inspection
   9.1 Types of inspection
   9.2 Inspection documents
   9.3 Summary of inspection and testing
10 Sampling
   10.1 Frequency of tests
   10.2 Preparation of samples and test pieces
11 Test methods
   11.1 Tensile test
   11.2 Impact test
   11.3 Hardenability test
   11.4 Hardness test
   11.5 Leak tightness test
   11.6 Non-destructive testing
   11.7 Dimensional inspection
   11.8 Visual examination
   11.9 Material identification
   11.10 Retests, sorting and reprocessing
12 Marking
13 Protection
Annex A (normative) Steels for case hardening
Annex B (informative) Recommended heat treatment temperatures
Annex C (normative) Hardness requirements for heat treated tubes
Annex D (normative) Hardenability - Limiting values for C scale
                      Rockwell
Annex E (normative) Formulae for calculation of nominal section
                      properties
Bibliography

Specifies the technical delivery conditions for seamless circular tubes made of non-alloy and alloy steels for mechanical and general engineering purposes.