This standard specifies the technical requirements, test methods, inspection rules, marking, packaging, quality certificate, quality assurance, etc. of LZ50 steel axle and steel billet for rolling stock.
This standard is applicable to the manufacture, order and inspection of LZ50 steel axle and steel billet for rolling stock.
2 Normative References
The following standards contained provisions which, through reference in this standard, constitute provisions of this standard. At the time of publication, all editions indicated are valid. All standards are subject to revision, and parties to agreements based on this standard are encouraged to investigate the possibility of applying the latest editions of the following standards.
GB 222-84 Method of Sampling Steel for Determination of Chemical Composition and Permissible Variations for Product Analysis
GB 223 Methods for Chemical Analysis of Iron, Steel and Alloy
GB 226-91 Etch Test for Macrostructure and Defect of Steels
GB 228-87 Metallic Materials - Tensile Testing
GB 1979-80 Diagram of A Low Magnification Texture Blemish Grading of Structural Steel
GB 4336-84 Method for Photoelectric Emission Spectroscopic Analysis of Carbon Steel Medium and Low Alloy Steel
GB 10561-89 Steel - Determination of Content of Non-metallic Inclusion - Micrographic Method Using Standard Diagrams
GB 12814-91 Axles for Railway Cars - Types and Basic Dimensions
GB/T 19002-92 Quality Systems - Model for Quality Assurance in Production and Installation
YB/T 5148-93 Metal - Methods for Estimating the Average Grain Size
ZBY 230-84 Commonly Used Specification for A-mode Ultrasonic Flaw Detector Using Pulse Echo Technique
ZBY 231-84 Testing Methods for Performance of Probes Used in Ultrasonic Flaw Detection
ZBJ 04001-87 Practice for Evaluating Performance Characteristics of A Scope Ultrasonic Pulse - Echo Testing Systems
ASTM E 8-91 Standard Test Methods for Tension Testing of Metallic Materials
ASTM E 112-95 Standard Test Methods for Determining Average Grain Size
AAR M-1003 Association of American Railroads (AAR) Quality Assurance System
3 Qualification As Manufacturer
The factory producing LZ50 steel axle and steel billet shall pass the certification of GB/T 19002 (ISO 9002) or AAR M-1003 system and establish and improve the quality assurance system of axle production process.
The certification of qualification as a manufacturer of LZ50 steel axle and steel billet shall be organized by MOR’s competent business department which represents users. Experts entrusted by MOR’s competent business department will regularly or irregularly carry out quality inspection on the LZ50 steel axle and steel billet produced by the factory with production qualification, and will regularly carry out reinspection on the production qualification of such factory.
