1、_ 6$(7HFKQLFDO6WDQGDUGV%RDUG5XOHVSURYLGHWKDW7KLVUHSRUWLV published by SAE to advance the state of technical and engineering sciences. The use of this report is entirely voluntary, and its applicability and suitability for any particular use, including any patent infringement arising therefrom, is th
2、e sole respoQVLELOLWRIWKHXVHU SAE reviews each technical report at least every five years at which time it may be revised, reaffirmed, stabilized, or cancelled. SAE invites your written comments and suggestions. Copyright 2016 SAE International All rights reserved. No part of this publication may be
3、 reproduced, stored in a retrieval system or transmitted, in any form or by any means, electronic, mechanical, photocopying, recording, or otherwise, without the prior written permission of SAE. TO PLACE A DOCUMENT ORDER: Tel: 877-606-7323 (inside USA and Canada) Tel: +1 724-776-4970 (outside USA) F
4、ax: 724-776-0790 Email: CustomerServicesae.org SAE WEB ADDRESS: http:/www.sae.org SAE values your input. To provide feedback on this Technical Report, please visit http:/standards.sae.org/J1237_201709 SURFACE VEHICLE STANDARD J1237 SEP2017 Issued 1978-06 Revised 2017-09 Superseding J1237 MAR2001 (R)
5、 Metric Thread Rolling Screws RATIONALE This SAE Standard has been completely revised. 1. SCOPE This SAE Standard covers material, dimensional, performance and test requirements for metric thread rolling screws suitable for use in general engineering applications. 1.1 Requirements for three material
6、-process options are stated: a. Screws (in sizes 2 x 0.4 thru 12 x 1.75) manufactured from low carbon steel, carbonitrided, and tempered. These VFUHZVDUHGHVLJQDWHG6$(-7SH b. Screws (in sizes 2 x 0.4 thru 12 x 1.75) manufactured from medium carbon alloy steel, heat treated to achieve properties compa
7、rable to ISO 898-1 property class 9.8 screws, and additionally, with the point selectively hardened. These screws DUHGHVLJQDWHG6$(-7SH c. Screws (in sizes 5 x 0.8 thru 12 x 1.75) manufactured from medium carbon alloy steel, heat treated to achieve properties comparable to ISO 898-1 property class 10
8、.9 screws, and additionally, with the point selectively hardened. These VFUHZVDUHGHVLJQDWHG6$(-7SH 1.2 When SAE J1237 is specified without Type designation, eitKHU7SHRU7SHPDEHVXSSOLHG 2. REFERENCES 2.1 Applicable Documents The following publications form a part of this specification to the extent sp
9、ecified herein. Unless otherwise indicated, the latest issue of SAE publications shall apply. 2.1.1 SAE Publications Available from SAE International, 400 Commonwealth Drive, Warrendale, PA 15096-0001, Tel: 877-606-7323 (inside USA and Canada) or +1 724-776-4970 (outside USA), www.sae.org. SAE J423
10、Methods of Measuring Case Depth SAE J864 Surface Hardness Testing and Files SAE INTERNATIONAL J1237SEP2017 Page 2 of 15 2.1.2 ASTM Publications Available from ASTM International, 100 Barr Harbor Drive, P.O. Box C700, West Conshohocken, PA 19428-2959, Tel: 610-832-9585, www.astm.org ASTM F1470 Standa
11、rd Guide for Fastener Sampling for Specified Mechanical Properties and Performance Inspection ASTM F2328M Standard Test Method for Determining Decarburization and Carburization in Hardened and Tempered Threaded Steel Bolts, Screws and Studs Metric ASTM F606/F606M Standard Test Methods for Determinin
12、g the Mechanical Properties of Externally and Internally Threaded Fasteners, Washers, and Rivets 2.1.3 ASME Publication Available from ASME, P.O. Box 2900, 22 Law Drive, Fairfield, NJ 07007-2900, Tel: 800-843-2763 (U.S./Canada), 001-800-843-2763 (Mexico), 973-882-1170 (outside North America), www.as
13、me.org. ASME B18.18 Quality Assurance for Fasteners 2.1.4 ISO Publications Copies of these documents are available online at http:/webstore.ansi.org/ ISO 898-1 Mechanical properties of fasteners made of carbon steel and alloy steel Part 1: Bolts, screws and studs with specified property classes Coar
14、se thread and fine pitch thread ISO 1207 Slotted cheese head screws Product grade A ISO 1580 Slotted pan head screws Product grade A ISO 2009 Slotted countersunk flat head screws (common head style) Product grade A ISO 2010 Countersunk slotted raised head screws (common head style) Product grade A I
15、SO 4014 Hexagon head bolts Product grade A ISO 4162 Hexagon flange bolts Small series ISO 7045 Pan head screws with type H or type Z cross recess Product grade A ISO 7046-2 Countersunk flat head screws (common head style) with type H or type Z cross recess Product grade A Part 2: Steel screws of pro
16、perty class 8.8, stainless steel screws and non-ferrous screws ISO 7047 Countersunk raised head screws (common head style) with type H or type Z cross recess Product grade A ISO 7048 Cross-recessed cheese head screws ISO 14580 Hexalobular socket cheese head screws ISO 14583 Hexalobular socket pan he
17、ad screws ISO 14584 Hexalobular socket raised countersunk head screws SAE INTERNATIONAL J1237SEP2017 Page 3 of 15 3. REQUIREMENTS 3.1 Material and Process Requirements - 7SH 3.1.1 Material and Chemistry 7SH 7SH VFUHZV VKDOO EHPDGH IURP FROG KHDGLQJ TXDOLW NLOOHG VWHH O ZLUH FRQIRUPLQJ WR WKH FKHPLFD
18、O FRPSRVLWLRQrequirements in Table 1: Table 1 - 7SH - Chemical composition requirements - composition limits1, % by mass Analysis Carbon Min Carbon Max Manganese Min Manganese Max Cast or Heat 0.15 0.25 0.70 1.65 Product 0.13 0.27 0.64 1.71 3.1.2 Heat Treatment 7SH 7SHVFUHZVVKDOOEHKHDWWUHDWHGLQDFRQW
19、LQXRXV carbonitriding or gas carburizing system. Cyaniding systems may be approved by the purchaser when a continuous flow (no batch) quenching process is employed that consistently produces uniform case and core hardness. 3.1.3 Tempering Temperatures 7SH Minimum tempering temperatures shall be 340
20、C. 3.2 Material and Process Requirements - 7SHVDQG 3.2.1 Material and Chemistry - 7SHVDQG Material for 7SHDQGVFUHZVVKDOOPHHWFKHPLFDOFRPSRVLWLRQSHU3URSHUW and meet the performance requirements specified in Table 8 for Non-lubricated screws. Screws supplied lubricated, either integral with coating or
21、supplemental; shall meet the performance requirements specified in Table 8 for Lubricated screws. Screws shall be suitably treated to avoid hydrogen embrittlement in accordance with the specified finish specification. In cases where screws are plated or coated following delivery to the purchaser (or
22、 where plating or coating of screws is otherwise under the control of the purchaser) the screw producer shall not be responsible for failures of the screw to meet mechanical or performance requirements due to plating or coating. 3.4 Dimensional Requirements 3.4.1 Head Dimensions Head dimensions shal
23、l conform to those specified in ISO 1207, ISO 1580, ISO 2009, ISO 2010, ISO 4014, ISO 4162, ISO 7045, ISO 7046-2, ISO 7047, ISO 7048, ISO 14580, ISO 14583, or ISO 14584. 3.4.2 Thread and Point Dimensions Thread and point dimensions shall conform to those given in Table 2. Threads shall conform to a
24、60-degree basic thread form. Threads are not subject to thread gaging. Details of point configuration shall be optional with the manufacturer providing all specified dimensions are maintained and screws meet the performance requirements of this document. SAE INTERNATIONAL J1237SEP2017 Page 5 of 15 T
25、able 2 - Thread and point dimensions of thread rolling screws2 Nominal Screw and Thread Pitch Major or C Dia Max Point or P Dia Max Point Length Max3 Point Length Min4 L Min Practical Nominal Screw Length 90-deg Heads L Min Practical Nominal Screw Length Countersunk Heads 2 x 0.4 2.06 1.67 1.4 0.8 4
26、 5 2.5 x 0.45 2.57 2.13 1.6 0.9 4 6 3 x 0.5 3.07 2.58 1.8 1.0 5 8 3.5 x 0.6 3.58 2.99 2.1 1.2 6 8 4 x 0.7 4.08 3.40 2.4 1.4 8 10 5 x 0.8 5.09 4.40 2.8 1.6 8 10 6 x 1 6.10 5.30 3.5 2.0 10 12 8 x 1.25 8.13 7.10 4.4 2.5 10 16 10 x 1.5 10.15 9.00 5.2 3.0 13 16 12 x 1.75 12.18 10.50 6.1 3.5 16 20 3.4.3 T
27、hread Length For screws of nominal lengths within the ranges listed under column Y of Table 3, the full form threads shall extend close to the head such that the specified thread major diameter limits are maintained to within the respective Y distance from the underside of the head, or closer if pra
28、cticable. See Figure 2. Screws of longer nominal lengths, unless otherwise specified by the purchaser, shall have a minimum length of full form thread as specified in column LT. 2 All dimensions are millimeters. 3 These values are equal to 3.5 times the pitch distance rounded off to 1 decimal place.
29、 4 These values are equal to 2 times the pitch distance rounded off to 1 decimal place. SAE INTERNATIONAL J1237SEP2017 Page 6 of 15 Figure 2 - Unthreaded length Table 3 - Full form thread length and unthreaded lengths5 Nominal Screw Size and Thread Pitch LT Full Form Thread Length for Nominal Screw
30、Lengths Than LT Full Form Thread Length Min6 Y Unthreaded Length Under Head for Nominal Screw Lengths dThan Y Unthreaded Length Under Head Max7 Y Unthreaded Length Under Head for Nominal Screw Lengths Than Y Unthreaded Length Under Head for Nominal Screw Lengths dThan Y Unthreaded Length Under Head
31、Max8 2 x 0.4 16 12.0 6 0.40 6 16 0.8 2.5 x 0.45 20 15.0 8 0.45 8 20 0.9 3 x 0.5 25 18.0 9 0.50 9 25 1.0 3.5 x 0.6 30 21.0 10 0.60 10 30 1.2 4 x 0.7 35 24.0 12 0.70 12 35 1.4 5 x 0.8 40 30.0 15 0.80 15 40 1.6 6 x 1 45 38.0 18 1.00 18 45 2.0 8 x 1.25 45 38.0 24 1.25 24 45 2.5 10 x 1.5 45 38.0 30 1.50
32、30 45 3.0 12 x 1.75 50 38.0 36 1.75 36 50 3.5 3.5 Mechanical Requirements - 7SH6FUHZV 3.5.1 Hardness - 7SH6FUHZV 3.5.1.1 10 degrees on all others. 11 Minimum product hardness values applicable to screws not subject to tensile tests, and these hardness requirements exclude induction hardened zone 3.2
33、.3 and Figure 1. 12 Surface hardness shall not exceed product hardness by more 3 points Rockwell C equivalent. 13 Surface hardness shall not exceed product hardness by more 3 points Rockwell C equivalent, and also shall not exceed Rockwell 15N 80, except as noted in 3.2.3 and Figure 1. SAE INTERNATI
34、ONAL J1237SEP2017 Page 9 of 15 3.7 Performance Requirements - 7SHVDQG NOTE: The performance requirements covered in this document apply only to the combination of laboratory conditions described in the testing procedures. If other conditions are encountered in an actual service application (such as
35、different materials, thicknesses, hole sizes, etc.), values shown herein for drive torque, torque-to-clamp load, and proof torque may require adjustment. 3.7.1 Drive Torque Screws shall, without deforming their own thread, form a mating internal thread in a test plate with the application of a torqu
36、e not exceeding the drive torque specified in Table 8 for the applicable screw size and finish, when tested in accordance with 4.6. 3.7.2 Torque-to-Clamp Load Upon request by purchaser, screws subject to tensile test, 4 x 0.7 size and larger, shall develop the clamp load specified in Table 8 with th
37、e application of a torque not exceeding the clamp load torque specified in Table 8 for the applicable screw size and finish, when tested in accordance with 4.7. Smaller sizes of screws and screws not subject to tensile test are not subject to torque-to-clamp load requirements. 3.7.3 Proof Torque Scr
38、ews with head styles subject to tensile test shall withstand without failure the proof torque and shall be capable of being removed from the test plate following application of the proof torque specified in Table 8 for the applicable screw size and finish, when tested in accordance with 4.7. Screws
39、not subject to tensile test are not subject to proof torque requirements. 3.7.4 Hydrogen Embrittlement Coated screws subject to internal hydrogen embrittlement shall not break when tested in accordance with 4.9. CAUTION: Case hardened fasteners (Type 2 ) may be subject to delayed brittle fracture ca
40、used by hydrogen resulting from corrosion. It is recommended that case hardened fasteners (Type 2 not be used in structural applications. SAE INTERNATIONAL J1237SEP2017 Page 10 of 15 3.8 Application 7KHVHOHFWLYHOKDUGHQHGSRLQWRI7SHDQG7SH screws shall extend beyond the load carrying portion of the int
41、ernal threads to perform correctly. The location of the induction hardened zone shall be beyond the exit side of the mating component in a through-hole application as depicted in Figure 3 or to maintain a minimum length of thread engagement equal to four full form non-induction hardened threads in a
42、 blind-hole application as depicted in Figure 4. Figure 3 - Through-hole application Figure 4 - Blind-hole application SAE INTERNATIONAL J1237SEP2017 Page11of15Table 8- Performance requirements -7SHVDQG14BasicDia and Thread Pitch (millimeters)Test Plate ThicknessmmTest Plate Pilot HoleDia mmDriveTor
43、que forLubricatedScrews max NxmDriveTorque forNon-lubricated Screws max NxmClamp LoadkNClamp LoadTorque forLubricatedScrews max NxmClamp LoadTorque forNon-lubricatedScrews max NxmProof Torque forLubricatedScrews Nxm Proof Torque forNon-lubricated Screws Nxm 2 x0.43 1.77 0.40.60.60.72.5x 0.453 2.25 0
44、.81.01.31.43 x0.53 2.71.31.72.42.53.5x 0.6 3 3.15 1.92.43.74.04 x0.75 3.62.63.43.14.24.85.45.85 x0.85 4.55 4.86.05.08.010.0 11.0 12.0 6 x1 6 5.47.59.26.915.0 16.0 19.0 20.0 8 x1.25 8 7.316.0 20.0 12.6 34.0 40.0 46.0 48.0 10x 1.5109.228.0 35.0 20.0 68.0 81.0 92.0 96.0 12x 1.75 1211.0 46.0 55.0 29.5 1
45、10.0130.0160.0170.014Values shown in Table 8 are intendedfor specification purposes andfor determination of acceptability of screws tothe requirements of this standard.Thesevalues are not validfor useindesign or assemblyunless allconditions of the applicationare identical withthosespecified for theinspectiontests.SAE INTERNATIONAL J1237SEP2017 Page 12 of 15 4. TEST METHODS 4.1 Core Hardness Core hardness shall be determined at mid-radius of a transverse section through the screw taken at a distance sufficiently behind the point of the screw to be through th
