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1、Author:http:/www.5dw.org 青州seoAn American National Standard美国国家标准American association standard美国协会标准Highway and transportation officials standard公路及交通体系的官方标准AASHTO No.: M102Standard specification for steel forgings, Carbon and alloy, for general industrial use This specification is under the jurisdi
2、ction of ASTM Committee A-1 on Steel, Stainless Steel, and Related Alloys, and is the direct responsibility of Subcommittee A01.06 on Steel Forgings and Billets.1 本规范的管辖方为ASTM A-1委员会，即钢、不锈钢及相关合金管理委员会，直接受控于A01.06，锻钢件及中小钢坯小组委员会。Current edition approved May 10, 1996. Published July 1996. Originally pub
3、lished as A668-72. Last previous edition A668-95a.现版规范于1996年5月10日审核通过，于1996年7月出版。首版发行于1972年，即A668-72，前一修订版为A668-95a。碳钢及合金钢锻件通用标准1This standard is issued under the fixed designation A 668/A 668 M; the number immediately following the designation indicates the year of original adoption, or, in the cas
4、e of revision, the year of last revision. A number in parentheses indicates the year of last reapproval. A superscript epsilon() indicates an editorial change since the last revision or reapproval.本标准的指定编号为A 668/A 668 M；编号后的数字为首版发行的年数，如有再版，则为最新版发行的年数。括号里的数字表示最后一次重新审核的年数。上标() 表示自最新版或重新审核起编辑上的变动。This
5、standard has been approved for use by agencies of the Department of Defense.本标准已审核通过，供国防部办事处之用。 () Note-table 3 printed incorrectly in the 1997 Volume 01.05. It appears now in its entirety.() 注：1997版卷01.05的表3印刷有误。本版全面再现此表。1.Scope应用范围1.1This specification covers untreated and heat-treated carbon and
6、alloy steel forgings for general industrial use. Other ASTM specifications for forgings are available for specific applications such as pressure vessels, railroad use, turbine generators, gearing, and others involving special temperature requirements.本规范为未经处理的及热处理的碳钢/合金钢锻件的通用标准。其它ASTM锻件规范也适用于压力容器、铁路
7、、涡轮发电机、传动装置及其它带有特殊温度要求的锻件。1.2Hot-rolled or cold finished bars are not within the scope of this specification.热轧或冷加工钢棒不在本规范范围之内。1.3Six classes of carbon steel and seven classes of alloy steel forgings are listed (see Section 7), which indicates their required heat treatments, as well as mechanical pr
8、operties.本标准给出了六类碳钢锻件以及七类合金钢锻件（见第七部分），包括它们的热处理及力学性能要求。1.4Supplementary requirements of an optional nature are provided. These shall apply only when specified by the purchaser.本规范也提供了补充性能要求，当且仅当购货方有特殊规定时适用。1.5Appendix X1 lists the grades corresponding to the various grades of Specifications A235, A23
9、7, and A243, which have been superseded by this specification.附录X1给出了与规范A235，A237及A243中的钢种相对应的钢种，上述各规范已被本规范取代。1.6The values stated in either inch-pound units or SI units are to be regarded separately as the standard; within the text and tables, the SI units are shown in brackets. The values stated i
10、n each system are not exactly equivalent; therefore, each system must be used independently of the other. Combining values from the two systems may result in nonconformance with the specification.本规范中有两种单位，即美制单位和公制单位，两种单位不可混用，在正文及表格当中，公制单位都是以括号括起来的。两个单位制给出的数值并非完全相等，因此，需要独立运用一个单位，将两个单位制中的数值结合运算将会导致与本
11、规范的偏离。2Referenced documents参考文献2.1ASTM Standards:ASTM标准A 275/A 275M Test method for magnetic particle examination of steel forgings Annual book of ASTM standard, Vol 01.05 ASTM标准年鉴，卷01.05锻钢件的磁粉探伤方法2A370 Test Methods and Definitions for mechanical testing of steel products Annual book of ASTM standar
12、ds, Vol 01.03 ASTM标准年鉴，卷01.03钢制件力学性能试验的方法及定义3A 388/A 388M Practice for Ultrasonic Examination of Heavy steel forgings2大型锻钢件的超声波探伤规范2A 654 Specification for special requirements for steel forgings and bars for nuclear and other special applications2核电及其它特殊领域的锻钢件及钢棒的特殊要求规范2A 788 Specification for stee
13、l forgings, General requirements2锻钢件通用规范2E 381 Method of Macrotech Testing Steel bars, billets, blooms, and forgings Annual book of ASTM standards, Vol 03.01 ASTM标准年鉴，卷03.01钢棒、中小型坯、大钢坯及锻件的试验方法43.Terminology术语3.1Definitions of terms specific to this standard:下述定义特适用于本标准：3.1.1Hollow cylindrical forgin
14、g-a forging whose length as measured on its longitudinal axis is more than its diameter shall be considered as a hollow cylinder within the scope of this specification if it has been lengthened by extrusion of forged in a manner similar to that of a ring, namely, expanded in diameter on a mandrel.中空
15、圆柱锻件：纵轴向的长度实测值比直径大的锻件，在本规范中称为中空圆柱锻件，通过将锻件拉长而形成，成型办法与锻环类似，锻环的形成是通过在心轴上挤压、将直径扩大。3.1.2Ring-shipped or disk-shaped forging-a forging whose length, as measured on its longitudinal axis, is less than its diameter or main transverse dimension is considered a ring or disk with the meaning of this specification.环形或盘状锻件：纵轴向的长度实测值小于直径或横向主要尺寸的锻件，在本规范中成为环形或盘状锻件。4.Ordering information订货信息4.1When this specification is to be applied to an inquiry contract, or order, the purchaser should furnish the following information:如把本规范用于询价合同或订单，购货方须提供如下信息：4.1.1The ord
