Mechanical and Material Requirements for MetricExternally Threaded Steel Fasteners公制外螺纹钢制紧固件机械性能与材料要求1. Scope 范围1.1 This SAE Standard covers the mechanical and material requirements for eight property classes of steel, externally threaded metric fasteners in sizes M1.6 through M36, inclusive, and suitable for use in automotive and related applications. 本SAE 标准涵盖汽车及相关工业使用，尺寸在M1.6到M36钢铁外螺纹紧固件的八个性能等级的机械性能与材料要求。1.2 Products included are bolts, screws, studs, U-bolts, preassembled screw and washer assemblies (sems), and products manufactured the same as sems except without washer. 产品包括：螺栓、螺钉、螺柱、U型螺栓、预装配的螺钉和垫片组件以及与预装配组件一样加工的无垫圈产品。1.3 Products not covered are tapping screws, thread-rolling screws, and self-drilling screws.Mechanical and material requirements for these products are covered in other SAE documents. 产品不包括自攻螺钉、自挤螺钉、钻尾螺钉。这些产品的机械性能与材料要求包含在SAE另外的标准中。1.4 The term stud as referred to herein, applies to a cylindrical rod of moderate length, threaded on either one orboth ends or throughout its entire length.It does not apply to headed, collared, or similar products which aremore closely characterized by requirements shown herein for bolts. 螺柱这里是指适用于中等长度圆柱杆，螺纹在一端有或两端都有，或全螺纹的产品。它并不适用于有头的、带定位的或类似于本文中所要求的螺栓特性近似的产品。1.5 For specification purposes, this document treats U-bolts as studs.Thus, wherever the word studs appears, U-bolts is also implied.U-bolts covered by this document are those used primarily in the suspension and related areas of vehicles.(Designers should recognize that the U configuration may not sustain a load equivalent to two bolts or studs of the same size and grade; thus actual load-carrying capacity of U-bolts should be determined by saddle load tests.) 为了规范，本标准将U型螺栓是为螺柱。因此，本文中涉及到的螺柱要求，U型螺栓同样适用。本文所提及的U型螺栓是使用于车辆悬挂位置或相关位置的产品。（设计者应了解到同样尺寸、等级的U型螺栓与两个螺栓或螺柱的载荷是不相等的，因此，U 型螺栓的实际承载应以鞍型荷重测试方法来判定。2 References 参考资料2.1 Applicable Publications The following publications form a part of this specification to the extent specified herein.Unless otherwise indicated, the latest issue of SAE publications shall apply. 适用版本- 下列出版物作为本标准的一部分。除非另有规定，应采用SAE最新版本标准。2.1.1 SAE PUBLICATIONS Available from SAE, 400 Commonwealth Drive, Warrendale, PA 15096-0001. SAE 美国汽车工程协会出版物SAE J121MDecarburization in Hardened and Tempered Metric Threaded Fasteners 公制螺纹紧固件淬硬和回火的脱碳要求SAE J123Surface Discontinuities on Bolts, Screws, and Studs in Fatigue Applications 用于疲劳载荷的螺栓、螺钉及螺柱的表面不连续性SAE J429Mechanical and Material Requirements for Externally Threaded Fasteners外螺纹紧固件的机械性能及材料要求SAE J1061Surface Discontinuities on General Application Bolts, Screws, and Studs通用螺栓、螺钉及螺柱的表面不连续性2.1.2 ASTM PUBLICATIONS Available from ASTM, 100 Barr Harbor Drive, West Conshohocken, PA 19428-2959.ASTM 美国材料与试验协会出版物 ASTM A 307Specification for Carbon Steel Bolts and Studs, 60 000 psi Tensile抗拉强度 60kpsi碳钢螺栓、螺柱的相关规范要求ASTM A 354Specification for Quenched and Tempered Alloy Steel Bolts, Studs, and Other ExternallyThreaded Fasteners淬火和回火合金钢螺栓、螺柱和其他外螺纹紧固件的标准规范ASTM A 449Specification for Quenched and Tempered Steel Bolts and Studs淬火和回火钢制螺栓及螺柱的标准规范ASTM F 606MStandard Test Methods for Determining the Mechanical Properties of Externally andInternally Threaded Fasteners, Washers, and Rivets测定外螺纹及内螺纹紧固件、垫圈及铆钉的机械特性的试验方法(米制)2.1.3 ASME PUBLICATION Available from ASME, 345 East 47 Street, New York, NY 10017-2330. ASME 美国机械工程师协会出版物 ASME B18.2.13. Designations 标示3.1 Property classes are designated by numbers where increasing numbers generally represent increasing tensilestrengths. The designation symbol consists of two parts: 性能等级由数字标示，数字越大通常代表抗拉强度越大。标示符号由两部分组成：a. The first numeral of a two-digit symbol or the first two numerals of a three-digit symbol approximates 1/100 of the minimum tensile strength in MPa.二个数字符号的第一个数或三个数字符号的前两位数接近最小抗拉强度（MPa）的1/100。b. The last numeral approximates 1/10 of the ratio expressed as a percentage between minimum yield stress and minimum tensile stress.最后一个数字约1/10的比率表示为最小屈服强度与最小抗拉强度指间的百分比。3.2 For specification purposes (on engineering drawings, purchase orders, etc.) all property class designations areused in combination with a single basic specification number as follows: 为了规范（在工程图、采购订单等文件中），所有性能等级标示使用由单个基本规范的数字组合，如下所示： SAE J1199 (4.6)SAE J1199 (4.8)SAE J1199 (5.8)SAE J1199 (8.8)SAE J1199 (9.8)SAE J1199 (10.9)3.3 Property Classes 性能等级3.3.1 Machine screws are normally available only in classes 4.8 and 9.8; other bolts, screws, and studs are available in all classes within the specified product size limitations given in Tables 1A and 1B. 机械螺钉通常仅适用于4.8级和9.8级；其他螺栓、螺钉和螺柱适用于表1A和表1B所规定所有等级。3.3.2 Screw and washer assemblies (sems) are covered by classes 4.8 and 9.8 and allowable deviations from normal 9.8 requirements are stated in footnotes throughout the document. 螺钉和垫片组件涵盖在4.8级和9.8级中，偏离正常9.8级的允差要求在整篇文档有脚注。3.3.3 At the option of the manufacturer, class 5.8 may be s