TB/T 447-2004 in English

1 Scope

This standard specifies the technical requirements, test methods, inspection rules, markings and the like of high manganese steel frogs (hereafter referred to as frogs) for railroad turnout.
This standard is applicable to high manganese steel casted frogs for railway as well as high manganese steel frogs and other high manganese steel castings indicated to use this standard.

2 Normative References.
The following documents contain provisions which, by reference into this standard, constitute the provisions of this standard. For dated reference, subsequent amendments (excluding corrigendum contents) to, or revisions of, any of these publications do not apply. However, all parties coming to an agreement according to this standard are encouraged to study whether the latest editions of these documents are applicable. For undated references, the latest edition of the normative document referred to applies. For undated references, the latest edition referred to applies.
GB/T 223.1-1981 Determination of Carbon Content in Iron, Steel and Alloy
GB/T 223.2-1981 Determination of Sulphur Content in Iron, Steel and Alloy
GB/T 223.4-1988 Methods for Chemical Analysis of Iron, Steel and Alloy; The Volumetric Method for Determination of Manganese Content by Ammonium Nitrate Oxidation
GB/T 223.5-1997 Methods for Chemical Analysis of Iron, Steel and Alloy; The Reduced Molybdosilicate Spectrophotometric Method for the Determination of Acid-soluble Silicon Content
GB/T 223.61-1988 Methods for Chemical Analysis of Iron, Steel and Alloy; The Ammonium Phosphomolybdate Volumetric Method for the Determination of Phosphorus Content
GB/T 228 Metallic Materials-Tensile Testing at Ambient Temperature
GB/T 229 Metallic Materials-Charpy Notch Impact Test
GB/T 231.1 Metallic Materials-Brinell Hardness Test-Part 1: Test Method
GB/T 4336 Standard Test Method for Spark Discharge Atomic Emission Spectrometric Analysis of Carbon and Low-alloy Steel (Routine Method)
GB/T 5680-1998 Austenitic Manganese Steel Castings
GB/T 6414 Castings--System of Dimensional Tolerances and Machining Allowances
GB/T 13925-1992 Metallographs for High Manganese Cast Steel
JB/T 9214-1999 Practice for Evaluating Performance Characteristics of A Scope Ultrasonic Pulse - Echo Testing Systems
JB/T 10061-1999 Commonly used Specification for A-mode Ultrasonic Flaw Detector Using Pulse Echo Technique

Foreword I
1 Scope
2 Normative References.
3 Technical Requirements
4 Testing Methods
5 Inspection Rules
6 Marking and Quality Assurance
Appendix A (Normative) Methods for Ultrasonic Inspection of High Manganese Steel Frog