1. UIC 860.O vs. EN
DB 410/04

2. Standard organisation
National committees
AFNOR and 31 standardisation offices in France ( BNS, BNF )
BSI in UK
DIN in Germany
ASTM in USA,
JIS in Japan, ...
International committees
ISO
CEN
Railway dedicated committees: UIC, AREMA

3. European track technical committee
CEN/TC 256/SC 1
GT 4 : Rails and welding of rails
GT 5 : Machines for construction and maintenance of the track
GT 15: Parameters for track design
GT 16: Sleepers
GT 17: Fastening systems
GT 18: Switches and crossings
GT 21: Track approval

4. Standards for rails and welding
Part 1: Vignole railway rails 46 kg/m and above
Others:
Switch and crossing rails
Vignole railway rails from 27 kg/m to but excluding 46 kg/m
Aluminothermic welding
Flash butt welding

5. Content of the standards
Normative references
Quality system
Production process
Steel grades and profiles
Qualifying tests
Acceptance tests

6. Grades UIC 4 grades EN 7 grades 700 900A 900B 1100 R 200 R 220 R 260
R 260Mn
R 320Cr
R 350HT
R 350LHT
Head hardened
rails

7. Chemical composition Mechanical properties
UIC

8. Chemical composition Mechanical properties
Hardness
max S EN

9. Profiles UIC EN 4 profiles Branding UIC XX XX = mass per meter
(Note : Euro  UIC)
Branding
YY E 1, 2,
YY: mass per meter
1,2,…geometrical variant for a same mass per meter

10. Computerized profile design
UIC EN

11. EN profiles and previous profiles

12. Branding
CORUS HY E1

13. Qualifying tests Tensile strength and elongation
Development of a predictive equation using multiple regression analysis
For each heat, calculation of the tensile strength and elongation
Results have to be higher than the specified values
Comparison with experimental results every tons

14. Qualifying tests Fracture mechanics KIC: toughness. Fatigue
Residual stress
KIC: toughness.
Da/Dn: fatigue crack growth rate
Constant amplitude fatigue tests
Limitation of the residual stress in rail foot, due to the straightening

15. Acceptance tests Chemical composition Microstructure Decarburisation
Oxide cleanness
Sulphur prints
Hardness
Tensile tests
Dimension tolerances
Straightness, surface flatness and twist
Ultrasonic test requirements
Surface quality

16. Hardness

17. Profile tolerances
New requirement:
Crown profile

18. Straightness

19. Straightness
New requirement:
Twist

20. Ultrasonic test 100% of the the rail length Cross-sectional area:
³70% Head
³ 60% Web
Foot
Calibration: Flat bottomed Æ 2 mm

21. Surface quality

22. Conclusion
Most commonly used standards of the world for the supply of railway rails have been reviewed during the preparation of this standard
Modern rail production technology and the requirements of railways within the Community have demanded a completely new look at the philosophy and content
This EN is performance based and requires manufacturers to offer the latest proven technology to consistently satisfy the demanding quality of the required product
Guarantee is considered as a commercial aspect by CEN. Therefore, it is not included in this EN and the guarantee definition and conditions have to be written in the commercial contract