JB 4726-2000 英文版 压力容器用碳素钢和低合金钢锻件.pdf

舆義逃碧恍唱 习幢義 The Chinese version of standards has precedence to their English translations which are only for internal reference. JB4726-2000 撺皱檔鞠鹪柜忌木 彤 Carbon and Low-alloy Steel Forgings for Pressure vessels /1/ Preface This standard is the revised version of JB 4726-1994. This standard has made following changes based on the ments obtained since the implementation of JB 4726-1994 the domestic development of new steel grade and reference of the recent international similar standards: 1 15MnV currently not used has been canceled; 2 Moderate temperate hydrogen resistant steel 14CrlMo has been added; 3 Phosphorus and sulfur contents have been decreased widely based on the domestic advanced smelting level so as to reach the international advanced level; 4 Omil impact test shall be used for 16Mn 20MnMo 20MnMoNb forgings instead of 20mil" impact test so as to meet the requirement of pressure vessel product standard; 5 Considering the safety of pressure vessels stipulations in appendix B have been added for each steel grade in this standard JB 4726-1994 shall be null since the implementation date of this standard. Appendix A and Appendix B of this standard are the standard appendixes. This standard is put forth by The National Pressure Vessels Standardization and Technical Committee. This standard belongs by right to the Manufacturing Sub-mittee of the National Pressure Vessel Standardization and Technical Committee. Responsible drafting unit of this standard:Hefei General Ma...