JB 4726-2000 英文版 压力容器用碳素钢和低合金钢锻件.pdf

本英文版为内部资料,仅供参考,以中文
版为准
The Chinese version of standards has
precedence to their English translations
which are only for internal reference
JB4726-2000
压力容器用碳素钢和低合金钢锻件
Carbon and Low-alloy Steel Forgings for
Pressure Vessels
Preface
Tthis standard is thc revised version of JB 4726-1394
This standard has madc following changcs bascd on thc commcnts obtaincd sincc thc
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 Modcratc tcmpcratc hydrogcn resistant stccl 14crlmo has bccn added
3 Phosphorus and sulfur contents have bccn clccrcascd widcly bascd on the domcstic
advanced smelting level so as to reach the international advanced level
4 0C impact test shall be used for 16MN, 20mn M0, 20MNMONB forgings instead of 20C
impact test, so as to meet the requirement of pressure vessel product standard
5 Considering the safcty of prcssurc vesscls stipulations in appendix B havc bccn added for
each steel grade in this standard
JB 4726-1994 shall be null since the implementation date of this slandard
Appendix A and Appendix B of this standard are the standard appendixes
This standard is put forth by The National Pressurc Vesscls Standardization and Tcchnica
Committee
This standard belongs by right to the Manulacturing Sub-committee of the National Pressure
Vessel Standardization and Technical Committee
Responsible drafting unit of this standard: Hefei General Machinery Research Institute, China
Gcncral Machincry and Enginccring Company, Wuhan Hcavy-duty Casting and Forging Works
Main dramlcrs of this standard: Zhang Yong, Qin Xiaozhong, Xu Jic, Tcng Mingde, Yan
Mingxin. Li Rongrong
This standard has been first issued in January 1994
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中华人民共和国行业标准
Industrial Standard of the People' s Republic of China
JB4726-2000
压力容器用碳素钢和低合金钢锻件
In substitution of
JB4726-1994
Carbon and Low-alloy Steel Forgings for Pressure Vessels
cope
This standard has spccificd the tcchnical rcquircmcnts, test mcthods and inspection rulcs, ctc
for carbon and low-alloy steel forgings for pressure vessels
This standard is applicable to carbon and low-alloy steel forgings for pressure vessels with a
design temperature above-20 C, design pressure below 35mpa
2 Reference standards
The articles contained in the standards below shall become part of this standard by reference
hereof The indicatcd versions arc cffcctiyc at thc timc of issuance of this standard All standards
arc subjcct to revision. Thcrcforc, the possibility of using thc latest vcrsion of thc standards bclow
shall be discussed by the users of this standard
GB/T222-1984
Method of sampling steel for determination of chemical composition
and permissible variations for product analysis
GB/T 223.5-1997 Mcthods for chcmical analysis of iron, stccl and alloy- Thc rcduccd
molybdosilicatc spcctro-photomctric mcthod for the dctermination of
acid-soluble silicon content
GB/T 223.11-1991 Methods for chemical analysis of iron, steel and alloy-the
ammonium persulphate oxidation volumetric method for the
dctermination of chromium contcnt
国家机械工业局
Approved by The State Machinery Industrial Bure