SAEJ1199公制外螺紋鋼制緊固件機械性能與材料要求中文版

1、Mechanical and Material Requirements for Metric Externally Threaded Steel Fasteners公制外螺紋鋼制緊固件機械性能與材料要求1. Scope 范圍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,

2、and suitable for use in automotive and related applications. 本SAE 標準涵蓋汽車及相關工業(yè)使用，尺寸在M1.6到M36鋼鐵外螺紋緊固件的八個性能等級的機械性能與材料要求。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. 產品包括：螺栓、螺釘、

3、螺柱、U型螺栓、預裝配的螺釘和墊片組件以及與預裝配組件一樣加工的無墊圈產品。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. 產品不包括自攻螺釘、自擠螺釘、鉆尾螺釘。這些產品的機械性能與材料要求包含在SAE另外的標準中。1.4 The term stud as ref

4、erred to herein, applies to a cylindrical rod of moderate length, threaded on either one or both ends or throughout its entire length. It does not apply to headed, collared, or similar products which are more closely characterized by requirements shown herein for bolts. 螺柱這里是指適用于中等長度圓

5、柱桿，螺紋在一端有或兩端都有，或全螺紋的產品。它并不適用于有頭的、帶定位的或類似于本文中所要求的螺栓特性近似的產品。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

6、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.) 為了規(guī)范，本標準將U型螺栓是為螺柱。因此，本文中涉及到的螺柱要求，U型螺栓同樣適用。本文所提及的U型螺栓是使用于車輛

7、懸掛位置或相關位置的產品。（設計者應了解到同樣尺寸、等級的U型螺栓與兩個螺栓或螺柱的載荷是不相等的，因此，U 型螺栓的實際承載應以鞍型荷重測試方法來判定。2 References 參考資料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. 適用

8、版本- 下列出版物作為本標準的一部分。除非另有規(guī)定，應采用SAE最新版本標準。2.1.1 SAE PUBLICATIONS Available from SAE, 400 Commonwealth Drive, Warrendale, PA 15096-0001. SAE 美國汽車工程協(xié)會出版物SAE J121MDecarburization in Hardened and Tempered Metric Threaded Fasteners 公制螺紋緊固件淬硬和回火的脫碳要求SAE J123Surface Discontinuities on Bolts, Screws, and Studs

9、 in Fatigue Applications 用于疲勞載荷的螺栓、螺釘及螺柱的表面不連續(xù)性SAE J429Mechanical and Material Requirements for Externally Threaded Fasteners外螺紋緊固件的機械性能及材料要求SAE J1061Surface Discontinuities on General Application Bolts, Screws, and Studs通用螺栓、螺釘及螺柱的表面不連續(xù)性 ASTM PUBLICATIONS Available from ASTM, 100 Barr Harbor Drive,

10、 West Conshohocken, PA 19428-2959.ASTM 美國材料與試驗協(xié)會出版物 ASTM A 307Specification for Carbon Steel Bolts and Studs, 60 000 psi Tensile抗拉強度 60kpsi碳鋼螺栓、螺柱的相關規(guī)范要求ASTM A 354Specification for Quenched and Tempered Alloy Steel Bolts, Studs, and Other ExternallyThreaded Fasteners淬火和回火合金鋼螺栓、螺柱和其他外螺紋緊固件的標準規(guī)范ASTM A

11、 449Specification for Quenched and Tempered Steel Bolts and Studs淬火和回火鋼制螺栓及螺柱的標準規(guī)范ASTM F 606MStandard Test Methods for Determining the Mechanical Properties of Externally andInternally Threaded Fasteners, Washers, and Rivets測定外螺紋及內螺紋緊固件、墊圈及鉚釘的機械特性的試驗方法(米制)2.1.3 ASME PUBLICATION Available from ASME,

12、345 East 47 Street, New York, NY 10017-2330. ASME 美國機械工程師協(xié)會出版物 3. Designations 標示3.1 Property classes are designated by numbers where increasing numbers generally represent increasing tensile strengths. The designation symbol consists of two parts: 性能等級由數字標示，數字越大通常代表抗拉強度越大。標示符號由兩部分組成：a. The fir

13、st 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.二個數字符號的第一個數或三個數字符號的前兩位數接近最小抗拉強度（MPa）的1/100。b. The last numeral approximates 1/10 of the ratio expressed as a percentage between minimum yield stress and minimu

14、m tensile stress.最后一個數字約1/10的比率表示為最小屈服強度與最小抗拉強度指間的百分比。3.2 For specification purposes (on engineering drawings, purchase orders, etc.) all property class designations are used in combination with a single basic specification number as follows: 為了規(guī)范（在工程圖、采購訂單等文件中），所有性能等級標示使用由單個基本規(guī)范的數字組合，如下所示： SAE

15、 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 性能等級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

16、 Tables 1A and 1B. 機械螺釘通常僅適用于4.8級和9.8級；其他螺栓、螺釘和螺柱適用于表1A和表1B所規(guī)定所有等級。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. 螺釘和墊片組件涵蓋在4.8級和9.8級中，偏離正常9.8級的允差要求在整篇文檔有腳注。3.3.3 At th

17、e option of the manufacturer, class 5.8 may be supplied with either class 4.6 or 4.8 is ordered, and class 4.8 may be supplied when class 4.6 is ordered. 供應商可自行選擇：4.6級或4.8級訂單產品可按5.8級提供；4.6級訂單產品可按4.8級提供。3.4 Conversion Guidance 轉換指導3.4.1 For guidance purposes only, to assist designers in selectin

18、g a property class: 僅為引導目的，以協(xié)助設計者選著性能等級： a. Class 4.6 is approximately equivalent to SAE J429, Grade 1 and ASTM A 307, Grade A.4.6級性能強度近似于SAE J429 等級1和ASTM A307 等級A的性能強度 。 b. Class 5.8 is approximately equivalent to SAE J429, Grade 2.5.8級性能強度近似于SAE J429 2級的性能強度。 c. Class 8.8 is approximately equival

19、ent to SAE J429, Grade 5, and ASTM A 449.8.8級性能強度近似于SAE J429 5級和ASTM A 499的性能強度。 d. Class 9.8 has properties approximately 9% stronger than SAE J429, Grade 5, and ASTM A 449.9.8級機械性能強度比SAE J429 5級和ASTM A 499 的強度高約9%。 e. Class 10.9 is approximately equivalent to SAE J429, Grade 8, and ASTM A 354, Gra

20、de BD.10.9級性能近似于SAE J429 8級和ASTM A 354 BD級的性能強度。表 1A螺栓、螺釘和螺柱的機械性能要求性能等級公稱直徑全尺寸產品保證載荷Mpa(1)全尺寸產品最小抗拉強度Mpa(1)加工試樣產品（尺寸大于M24）最小屈服強度Mpa加工試樣產品（尺寸M24）最小抗拉強度Mpa（2）加工試樣產品（尺寸M24）最小伸長率%加工試樣產品（尺寸M24）最小端面收縮率%4.6M5到M36225400240(3)40022354.8M1.6到M16310420-5.8M5到M24(4)380520-8.8M17到M3660083066083012359.8M1.6到M16（5

21、）650900-10.9M6到M36830104094010409351. 全尺寸產品每一性能等級的保證載荷及抗拉強度值見表5。2. 屈服強度是應力發(fā)生在 0.2%的永久變形的量具長度計算所得的應力。3. 屈服點適用于替代屈服強度在0.2%偏移量的4.6級產品。4. 5.8級適用于產品長度150mm的螺栓及螺釘，以及所有長度的螺柱。5. 對于9.8級的螺釘與墊片組件產品，基材硬度可在25-40HRC(270-390HV)之間，表面硬度不能超過60 HR30N. 此要求同樣適用于和組件一樣加工的無墊片，尺寸在M1.6到M12的產品。表 1B螺栓、螺釘和螺柱的機械性能要求性能等級公稱直徑

22、最大表面洛氏硬度30N產品洛氏硬度最?。?）產品洛氏硬度最大產品維氏硬度最小（1）產品維氏硬度最大4.6M5到M36-B67B871201804.8M1.6到M16-B71B871301805.8M5到M24(2)-B82B951602208.8M17到M36（3）C23C342543369.8M1.6到M16（4）（3）C27C3627935410.9M6到M36（3）C33C393273821. 如果最小抗拉強度滿足要求，最小硬度值不予要求。2. 5.8級適用于產品長度150mm的螺栓及螺釘，以及所有長度的螺柱。3. 表面硬度不得超過多于兩點測得的基材硬度（洛氏C相當），10.9級情況下也

23、不得超過59 HR30N.4. 對于9.8級的螺釘與墊片組件產品，基材硬度可在25-40HRC (270-390HV)之間，表面硬度不能超過60 HR30N. 此要求同樣適用于和組件一樣加工的無墊片，尺寸在M1.6到M12的產品。3.4.2 Note that class 8.8 is applicable to sizes above 16 mm, and class 9.8 is applicable to sizes 16 mm and smaller. 8.8級適用于尺寸大于16mm的產品，9.8適用于尺寸16mm的產品。4 Materials and Processes 材

24、料及流程4.1 Steel CharacteristicsBolts, screws, and studs shall be made of steel conforming to the description and chemical composition requirements specified in Table 2 for the applicable property class. 鋼材特性- 螺栓、螺釘和螺柱材料應符合表2中各相應等級的相關說明及化學成分要求。性能等級說明與化學成分4.6和4.8供應商自選-低、中碳鋼（所有尺寸），成分要求：C:0.55、P:0.048，S:0

25、.0585.8供應商自選-低、中碳鋼（所有尺寸），成分要求：C:0.13-0.55、P:0.048，S:0.058;僅對螺柱: S:0.338.8供應商自選-中碳鋼（所有尺寸），成分要求：C:0.28-0.55、P:0.048，S:0.058，僅對螺柱: S:0.13；中碳合金鋼（尺寸M24），成分要求：C:0.28-0.55、P:0.040，S:0.045；客戶指定材料-低碳馬氏體鋼（尺寸M20）, 成分要求：C:0.15-0.27, Mn:0.74-1.46, P:0.038, S:(1);中碳硼鋼（尺寸M24）, 成分要求：C:0.25-0.40, Mn:0.74 P:0.048, S:

26、(1);9.8供應商自選-, P:0.048, S:0.058;僅對螺柱: S:0.13；對螺釘與墊片組件產品以及和組件一樣加工的無墊片產品，尺寸M12，碳含量可0.15-0.40，見表6 注2；客戶指定材料-低碳馬氏體鋼（尺寸M20）, 成分要求：C:0.15-0.27, Mn:0.74-1.46, P:0.038, S:(1);中碳硼鋼（尺寸M24）, 成分要求：C:0.25-0.40, Mn:0.74 P:0.048, S:(1);10.9供應商自選-中碳合金鋼（所有尺寸），成分要求：C:0.28-0.55, P:0.040, S:0.045, 細晶粒;淬硬性47HRC(2)SAE 15

27、41 或 SAE 1541 H (尺寸M12), 細晶粒；客戶指定材料-碳鋼（尺寸M20）,細晶粒； 低碳馬氏體鋼（尺寸M20）,成分要求：C:0.15-0.27, Mn:0.74-1.46, P:0.038, S:(1), 淬硬性40HRC(2);中碳硼鋼（尺寸M24）, 成分要求：C:0.25-0.40, Mn:0.74 P:0.048, S:(1), 淬硬性40HCR(2)。1. 由低碳馬氏體鋼和中碳硼鋼制造的產品須按照表6注1的要求進行標識識別。2. 鋼材須有淬硬性，淬硬性能產生最小硬度值（洛氏硬度C）,此硬度測與螺栓、螺釘或螺柱（淬火后）螺紋端一個公稱直徑橫切面的中心位置。4.2 H

28、eading practice 頭部成型4.2.1 Methods other than upsetting and/or extrusion are permitted only by special agreement between purchaser and manufacturer. 有別于一般鐓鍛成型或擠壓成型以外的成型方式需經過買賣雙方同意方可執(zhí)行。 Class 4.6 may be hot or cold headed at option of the manufacturer. 4.6級的產品用熱鍛或冷鍛，由制造方決定。4.2.3 Class 4.8, 5.8, 8.8, 9

29、.8, and 10.9 bolts and screws in sizes up to M20 inclusive, and lengths up to 10 times the nominal product size or 150 mm, whichever is shorter, shall be cold headed, except that they may be hot headed by special agreement of the purchaser. Larger sizes and longer lengths may be cold or hot headed a

30、t option of the manufacturer. 4.8、5.8、8.8、9.8和10.9級螺栓、螺釘，尺寸M20、長度是小于等于產品公稱尺寸10倍或150mm須冷鐓成型，客戶特別要求熱鍛成型的除外。大尺寸或較長尺寸的產品則可由制造者自行決定使用冷鍛或熱鍛成型。4.3 Threading Practice Class 4.8, 5.8, 8.8, 9.8, and 10.9 bolts and screws in sizes up to M20 inclusive, and lengths up to 150 mm inclusive, shall be roll threaded,

31、 except by special agreement. Threads of all sizes of class 4.6 bolts and screws and class 4.8, 5.8, 8.8, 9.8, and 10.9 bolts and screws in sizes over M20 and/or lengths longer than 150 mm, may be rolled, cut, or ground, at option of the manufacturer. Threads of all classes and sizes of studs may be

32、 rolled, cut, or ground at option of the manufacturer. 螺紋成型 4.8、5.8、8.8、9.8和10.9級螺栓、螺釘，尺寸M20，長度150mm, l螺紋須滾制成型，客戶特殊要求除外。4.6級螺栓、螺釘所有尺寸的螺紋，4.8、5.8、8.8、9.8和10.9級的螺栓、螺釘的螺紋，尺寸M20 級及/或長度150mm,可采用滾制、切削或磨削方式進行制造，由制造商自行決定。所有等級及所有尺寸的螺柱的螺紋可采用滾制、切削或磨削方式進行制造，由制造商自行決定。4.4 Heat Treatment Practice 熱處理4.4.1 Class 4.

33、6 bolts and screws and class 4.6, 4.8, and 5.8 studs need not be heat treated. Class 4.8 and 5.8 bolts and screws shall be stress relieved if necessary to assure the soundness of the head to shank junction. When specified by the purchaser, class 5.8 bolts and screws shall be stress relieved at a min

34、imum stress relief temperature of 470 °C. Where higher temperatures are necessary to relieve stresses in severely upset heads, mechanical requirements shall be agreed upon by manufacturer and purchaser. 等級4.6的螺栓、螺釘以及等級4.6、4.8和5.8級的螺柱不需要熱處理。4.8和5.8級的螺栓、螺釘如必要的話須消除應力，以保證頭桿連接處的穩(wěn)固性。如買方特別指定，5.8 級螺栓、螺

35、釘應在最小 470溫度下消除應力。當需要更高的溫度來消除應力時，機械性能要求須買賣雙方達成一致。4.4.2 Class 8.8 and 9.8 bolts, screws, and studs shall be heat treated, quenched in oil or water-base quenchant at the option of the manufacturer, and tempered at a minimum tempering temperature of 425 °C for class 8.8 and 410 °C for class 9.

36、8. For class 9.8 screw and washer assemblies (sems), quenchants whose principal constituent is water shall NOT be used, and tempering temperature shall be no less than 340 °C. See also 4.4.5. 8.8和9.8級螺栓、螺釘及螺柱應進行熱處理，油淬或水淬供應商自行決定，8.8級最小回火溫度425、9.8級最小回火溫度410。對于9.8級螺釘與墊片組件不得使用主要成分為水的淬火介質，回火溫度不得低于34

37、0。亦可見4.4.5。 4.4.3 Medium carbon alloy steel class 10.9 bolts, screws, and studs shall be heat treated, oil quenched, and tempered at a minimum tempering temperature of 425 °C. Low-carbon martensite steel class 10.9 bolts, screws, and studs shall be heat treated, quenched in oil or water-base qu

38、enchant at the option of the manufacturer, and tempered at a minimum tempering temperature of 340 °C. See also 4.4.5. 10.9級中碳合金鋼螺栓、螺釘應進行熱處理，淬火介質油，最小回火溫度425。10.9級低碳馬氏體鋼螺栓、螺釘和螺柱應進行熱處理，油淬或水淬制造商自行決定，回火溫度不得低于340。亦可見4.4.5。4.4.4 Under no circumstances should heat treatment or carbon restoration be acc

39、omplished in the presence of nitrogen compounds, such as carbonitriding or cyaniding. 在任何情況下的熱處理或碳恢復須在氮化合物存在下完成，如碳氮共滲或 氰化處理。4.4.5 Tempering Temperature Audit Test (for checking whether products have been tempered at specified temperature). Conduct hardness test (ASTM F 606M) on one or more bolt

40、s, screws, or studs; retemper the product(s) at a temperature 10 °C less than the specified minimum tempering temperature for 30 min; repeat product hardness test. The difference between the mean hardnesses (before and after retempering) shall be no greater than 2 points Rockwell C (approximate

41、ly 20 Vicker points). 回火溫度監(jiān)視測試（檢查產品是否按技術規(guī)定的溫度進行回火）。在一個或多個螺栓、螺釘或螺柱上進行硬度測試（依據標準ASTM F 606M）；重回火產品回火溫度低于最小規(guī)范溫度10；然后對回火產品進行硬度測試。平均硬度之間的差異（重回火前后的硬度）不得超過兩個HRC 硬度點（大約20個維氏硬度點）。5 Mechanical and Physical Properties 力學與物理性能5.1 Mechanical Bolts, screws, and studs shall be tested in accordance with the mechanic

42、al testing requirements for the applicable type, property class, size, and length of product as specified in Tables 3A and 3B, and shall meet the mechanical requirements specified for that product in Tables 1A and 1B. 力學性能- 螺栓、螺釘和螺柱應按表3A和3B規(guī)定的機械性能測試要求對相應類型、等級、公稱尺寸和長度進行測試，并滿足表1A和1B規(guī)定的產品機械性能要求。5.2 Dec

43、arburizationUnless otherwise specified, class 8.8 and 9.8 products shall conform to decarburization class 1/2H and Class 10.9 products shall conform to decarburization class 2/3H as specified in SAE J121M. 脫碳- 除非另有規(guī)定，8.8和9.8級產品脫碳等級應符合SAE J121M規(guī)定的1/2H級，10.9級產品脫碳等級應符合2/3H級要求。5.3 Surface Discontinuitie

44、s 表面不連續(xù)性5.3.1 Bolts, screws, and studs of classes 8.8, 9.8, and 10.9 in sizes up to M24 inclusive, and lengths up to 150 mm inclusive, shall not have surface discontinuities exceeding the limits specified in SAE J1061. 8.8、9.8、和10.9級的螺栓、螺釘和螺柱，尺寸M24，長度150mm，表面不連續(xù)性不得超過SAE J1061 規(guī)定的限制。 Surface disconti

45、nuities for sizes and lengths of products not covered in the scope of SAE J1061 shall be within limits specified by purchaser. 對于沒有含括在SAE J1061中的尺寸和長度的產品的表面不連續(xù)性限制應滿足買方指定的要求。 When the engineering requirements of the application necessitate that surface discontinuities must be more closely controlled,

46、 the purchaser shall specify the applicable limits in the original inquiry and purchase order. For certain fasteners, this may be done by reference to SAE J123. 當適用需要工程要求表面不連續(xù)性控制加嚴時，買方需在最初詢盤和采購訂單中規(guī)定適用限制。對某些緊固件，SAE J 123 可作參考。6 Methods of Test 測試方法6.1 GeneralProcedures for conducting the tests to det

47、ermine the mechanical properties as specified in Tables 3A and 3B for the applicable product, property class, size, and length are given in ASTM F 606M. Tables 3A and 3B specifies the applicable test method to be followed when determining each mechanical property. 通用方法-依據ASTM F 606M 規(guī)程進行測試以確定相應產品、等級

48、、尺寸和長度是否符合表3A和3B中規(guī)定的性能等級。表3A和3B規(guī)定了適用的測試方法以確定每一機械性能。表3A-螺栓、螺釘和螺柱機械性能測試要求產品性能等級規(guī)定的最小產品抗拉強度kN產品長度（1）產品硬度最大（2）產品硬度最?。?）表面硬度（2）（3）全尺寸產品保證載荷測試(2)全尺寸產品楔形抗拉強度測試（2）（4）全尺寸產品軸向抗拉強度測試（2）短螺栓螺釘所有所有小于2-1/4D.-特殊頭部螺栓螺釘（5）所有所有所有.-六角頭螺栓螺釘（6）（7）所有450及以下2-1/4D至8D或200mm, 視何者較長而定.-.。.-所有450及以下超過8D或200mm, 視何者較長，到300mm(含).-

49、.。.-所有450及以下超過300mm.-.A-所有大于4502-1/4D及以上.-.。A-其他螺栓螺釘所有450及以下2-1/4D至8D或200mm, 視何者較長.-.。-.所有450及以下超過8D或200mm, 視何者較長.-.。-A所有大于4502-1/4D及以上.-.。-A短螺柱所有所有小于2-1/4D.-其它螺柱所有450及以下2-1/4D至8D或200mm, 視何者較長.-.。.-其它螺柱所有450及以下超過8D或200mm, 視何者較長.-.。A-所有大于4502-1/4D及以上.-.。A-測試依據ASTM F 606M章節(jié)3.13.13.13.23.53.41、 D等于產品公稱

50、尺寸。為表 3 的要求：“產品長度”為一般長度包含尾端倒角如 ASME B18.2.1 所定義，其他特殊尾端產品必須從承面到完整牙型的端部。2、“.”是強制試驗標識。每一產品所有強制試驗項目都必須進行。另外所有測試選項的指示， A標識測試（全尺寸產品）和B標識測試（加工試驗件）都要進行測試；B測試項不適用于尺寸M24?！啊！表棶斪畛踉儽P和訂單有規(guī)定時，須進行測試。有爭議時，“A”和“?！表椂家M行測試。破折號（-）代表不需要進行測試。3、表面硬度及脫碳要求僅適用于8.8、9.8、10.9級產品。4、抗拉強度楔形角度見表4.5、異形螺栓、螺釘是指特殊結構或者頭部有鉆孔的產品，其頭部強度比螺紋段脆

51、弱。6、包括法蘭、墊片及其他六角頭造形的產品，其強度不比螺紋段弱。7、包括9.8級組件以及像組件一樣加工的9.8級無墊片產品（尺寸1.6M12）。為了確定拉伸試驗的適用性，組件長度測量從不平墊片的支撐面的底面到螺釘全螺紋螺桿末端。表3B-螺栓、螺釘和螺柱機械性能測試要求產品性能等級規(guī)定的最小產品抗拉強度kN產品長度（1）加工試樣件屈服強度測試（2）加工試樣件抗拉強度測試（2）加工試樣件伸長率（2）加工試樣件端面收縮率（2）螺紋段脫碳（2）（3）短螺栓螺釘所有所有小于2-1/4D-。特殊頭部螺栓螺釘（4）所有所有所有-。六角頭螺栓螺釘（5）6）所有450及以下2-1/4D至8D或200mm, 視

52、何者較長為準-。所有450及以下超過8D或200mm, 視何者較長為準，到300mm(含)-。所有450及以下超過300mmBBBB。所有大于4502-1/4D及以上BBBB。其他螺栓螺釘所有450及以下2-1/4D至8D或200mm, 視何者較長為準-。所有450及以下超過8D或200mm, 視何者較長為準BBBB。所有大于4502-1/4D及以上BBBB。短螺柱所有所有小于2-1/4D-。其它螺柱所有450及以下2-1/4D至8D或200mm, 視何者較長-。所有450及以下超過8D或200mm, 視何者較長為準BBBB。所有大于4502-1/4D及以上BBBB。測試依據章節(jié)ASTM F

53、606M3.6ASTM F 606M3.6ASTM F 606M3.6ASTM F 606M3.6SAE J121M1、 D等于產品公稱尺寸。為表 3 的要求：“產品長度”為一般長度包含尾端倒角如 ASME B18.2.1 所定義，其他特殊尾端產品必須從承面到完整牙型的端部。2、“.”是強制試驗標識。每一產品所有強制試驗項目都必須進行。另外所有測試選項的指示， A標識測試（全尺寸產品）和B標識測試（加工試驗件）都要進行測試；B測試項不適用于尺寸M24。“?！表棶斪畛踉儽P和訂單有規(guī)定時，須進行測試。有爭議時，“A”和“?！表椂家M行測試。破折號（-）代表不需要進行測試。3、表面硬度及脫碳要求僅適

54、用于8.8、9.8、10.9級產品。4、特殊頭部螺栓、螺釘是指特殊結構或者頭部有鉆孔的產品，其頭部強度比螺紋段脆弱。5、包括法蘭、墊片及其他六角頭造形的產品，其強度不比螺紋段弱。6、包括9.8級組件以及像組件一樣加工的9.8級無墊片產品（尺寸1.6M12）。為了確定拉伸試驗的適用性，組件長度測量從不平墊片的支撐面的底面到螺釘全螺紋螺桿末端。表4-抗拉測試楔形角度產品性能等級公稱尺寸楔形角度六角頭、華司頭機加螺釘4.8、9.8M10及以下6六角螺栓、螺釘螺紋1D并接近頭部底部8.8、9.8、10.9M20及以下6M20MM364六角法蘭、司華頭機加螺栓、螺釘4.6、4.8、5.8、8.8、9.8、10.9M36及以下6其他六角螺栓、螺釘4.6、4.8、5.8