Corus Rail / Rail Products / HayangePage 1 UIC 860.O vs. EN 13674-1 DB 410/04.

Corus Rail / Rail Products / Hayange

UIC 860.O vs. EN 13674-1

DB 410/04


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


Europeantrack 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


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


Content of the standards

• Normative references

• Quality system

• Production process

• Steel grades and profiles

• Qualifying tests

• Acceptance tests


Grades

• UIC

4 grades

– 700

– 900A

– 900B

– 1100

• EN

7 grades

– R 200

– R 220

– R 260

– R 260Mn

– R 320Cr

– R 350HT

– R 350LHT

Head hardened

rails


Chemical compositionMechanical properties


Chemical compositionMechanical properties

Smax

Hardness


Profiles

UIC4 profiles

Branding

UIC XX

XX = mass per meter

EN21 profiles

(Note : Euro UIC)

Branding

YY E 1, 2,

YY: mass per meter

1,2,…geometrical variant for a same mass per meter


Computerized profile design

UIC EN


EN profiles and previous profiles


Branding

CORUS HY 04 60E1


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 2 000 tons


Qualifying tests

• Fracture mechanics

• 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


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


Hardness


Profile tolerances

• New requirement:

– Crown profile


Straightness

Position Maximum amplitude EN class A EN class B UIC0.3 mm / 3 m 0.4 mm / 3 m0.2 mm / 1 m 0.3 mm / 1 m

Horizontal flatness 0.45 mm / 1.5 m 0.6 mm / 1.5 m0.4 mm / 2 m0.3 mm / 1 m0.5 mm / 2 m0.4 mm / 1 m

Whole rail Mini radius 1500 m 1500 m 1000 m

Vertical flatness

Vertical straightness

Horizontal straightness

Body

Ends

Straight according to visual inspection

0.5 mm / 1.5 m 0.7 mm / 1.5 m

0.7 mm / 1.5 m 0.7 mm / 1.5 m


Straightness

• New requirement:

– Twist


Ultrasonic test

100% of the the rail length

Cross-sectional area:

70% Head

60% Web

Foot

Calibration: Flat bottomed 2 mm


Surface quality


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

Corus Rail / Rail Products / HayangePage 1 UIC 860.O vs. EN 13674-1 DB 410/04.

Documents

Transcript of Corus Rail / Rail Products / HayangePage 1 UIC 860.O vs. EN 13674-1 DB 410/04.