1 Scope
This standard specifies production and inspection requirements of Grade A~H (Appendix A) carbon steel forgings (except axle).
This standard is applicable to carbon steel forgings for rolling stock and other railway equipment.
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 223.1~223.2-81 Determination of Carbon Content in Iron, Steel and Alloy ~ Determination of Sulphur Content in Iron, Steel and Alloy
GB 223.3~223.5-88 Methods for Chemical Analysis of Iron, Steel and Alloy - The Diantipyryl methane Phosphomolybdate Gravimetric Method for the Determination of Phosphorus Content; Methods for Chemical Analysis of Iron, Steel and Alloy - The Volumetric Method for Determination of Manganese Content by Ammonium Nitrate Oxidation; Methods for Chemical Analysis of Iron, Steel and Alloy - The Oxalic Acid-ferrous Sulfate Molybdosilicate Blue Complex Photometric Method for the Determination of Silicon Content
GB 228-87 Metallic Materials - Tensile Testing
GB 699-88 Carbon Constructional Quality Steel - Technical Conditions
GB 700-88 Carbon Structure Steel
ASTM A 370-95 Standard Test Methods and Definitions for Mechanical Testing of Steel Products
3 Requirements
3.1 Forged steel shall be produced in open hearth furnace, electric furnace or basic oxygen furnace.
3.2 Chemical composition of steel shall be in accordance with those specified in Table 1. Steels with the carbon content of 0.25~0.40 may be in accordance with the requirements of GB 699 and GB 700.
Foreword I
1 Scope
2 Normative References
3 Requirements
4 Heating and Cooling
5 Heat Treatment
6 Straightening
7 Test Requirements
8 Test Quantity
9 Repeat Test
10 Process Quality
11 Inspection and Acceptance
12 Marking and Certificate
Appendix A (Normative) 8 Grades of Carbon Steel Forgings
Appendix B (Informative) Comparison of Steel Grades
Appendix C (Informative) Supplementary Requirements
