This standard specifies the terms and definitions, model dimension, shape, length, weight and permissible variations, technical requirements, test methods, inspection rules, marking and quality certificate, quality assurance, etc. for 43 kg/m~75 kg/m rails.
This standard is applicable to 43 kg/m~75 kg/m hot-rolled rails for railway with a maximum running speed of 160 km/h.
Foreword i
1 Scope
2 Normative References
3 Terms and Definitions
4 Model Dimension, Shape, Length, Weight and Permissible Variations
4.1 Model Dimension and Permissible Variations
4.2 Shape and Permissible Variations
4.3 Length and Permissible Variations
5 Technical Requirements
5.1 Manufacturing Method
5.2 Designation and Chemical Composition
5.3 Delivery state
5.4 Tensile Property
5.5 Heat-treatment of Rail End
5.6 Macrostructure
5.7 Microstructure
5.8 Decarburized Layer
5.9 Nonmetallic Inclusion
5.10 Drop Weight
5.11 Ultrasonic Testing
5.12 Surface Quality
5.13 Residual Stress of Foot
5.14 Fatigue
5.15 Fracture Toughness
6 Test Method
6.1 Inspection Item, Inspection Frequency, Sampling Position and Test Method
6.2 Chemical Composition Test
6.3 Microstructure Test
6.4 Decarburized Layer Test
6.5 Nonmetallic Inclusions Evaluation
6.6 Drop Weight Test
6.7 Ultrasonic Testing
6.8 Residual Stress at Rail Root
6.9 Fatigue Test
6.10 Fracture Toughness
7 Inspection Rules
7.1 Inspection and Acceptance
7.2 Batching Rules
7.3 Re-inspection and Judgment
8 Mark and Quality Certificate
8.1 Mark
8.2 Quality Certification
9 Quality Assurance
9.1 Quality Assurance System
9.2 Quality Guarantee Period
Appendix A (Normative) Heat-Treatment Technical Conditions for Rail End
Appendix B (Normative) Unallowable Defects on the Transversal Acid Leached Test Plate of Rail
Appendix C (Normative) Measured Method for Longitudinal Residual Stress of Foot
Appendix D (Normative) Test Method for Rail Plane Strain Fracture Toughness KIC
Appendix E (Normative) Type and Dimension of 43kg/m ~ 75kg/m Rails
Appendix F (Normative) Template of Rail
