1、_SAE Technical Standards Board Rules provide that: “This report is 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 theref
2、rom, is the sole responsibility of the user.” SAE reviews each technical report at least every five years at which time it may be reaffirmed, revised, or cancelled. SAE invites your written comments and suggestions. Copyright 2009 SAE International All rights reserved. No part of this publication ma
3、y be 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: 724-776-4970 (outside USA)
4、Fax: 724-776-0790 Email: CustomerServicesae.org SAE WEB ADDRESS: http:/www.sae.orgSURFACEVEHICLESTANDARDJ2614 SEP2009 Issued 2003-01 Revised 2009-09 Superseding J2614 JAN2003 Welded and Cold-Drawn, High Strength (500 MPa Tensile Strength)Low Alloy Steel Hydraulic Tubing, Sub-Critically Annealed for
5、Bending and Flaring RATIONALEThis SAE standard has been revised as part of the SAE five year review process and to bring this document into line with global standardization. 1. SCOPE This specification covers sub-critically annealed electric resistance welded and cold-drawn single-wall high strength
6、 low alloy steel tubing intended for use in hydraulic pressure lines and in other applications requiring tubing of a quality suitablefor bending, flaring, cold forming, welding and brazing.The grade of material produced to this specification is of micro-alloy content and is considerably stronger and
7、 intended to service higher pressure applications than like sizes of the grades of material specified in SAE J525 and SAE J2467. Due to the alloy content of the material, the forming characteristics of the finished tube are equal to or better, when compared to SAE J525 and SAE J2467. Nominal referen
8、ce working pressures for this tubing are listed in ISO 10763 for metric tubing and SAE J1065 for inch tubing. CAUTION: When brazing or welding is used as a tube end joining method, the structural integrity of the tube material can potentially be compromised due to the degradation of the areas affect
9、ed by the thermal effect applied to the tubing; therefore, the ISO 10763 and SAE J1065 nominal reference working pressures may not be applicable. Brazed and/or welded tube assembly configurations made to specific geometry and components bill of material in association with this material, may require
10、 qualification testing in accordance with ISO 19879 Test Methods for Hydraulic Fluid Power Connections. Cold forming the tube end configurations avoids this systemic testing by not compromising the tube material structural integrity. 2. REFERENCES 2.1 Applicable Publications The following publicatio
11、ns form a part of this specification to extent specified herein. Unless other specified, the latest issue of the SAE publications shall apply. SAE J2614 Revised SEP2009 Page 2 of 72.1.1 SAE Publications Available from SAE International, 400 Commonwealth Drive, Warrendale, PA 15096-0001, Tel: 877-606
12、-7323 (inside USA and Canada) or 724-776-4970 (outside USA), www.sae.org.SAE J409 Product AnalysisPermissible Variations from Specified Chemical Analysis of a Heat or Cast of Steel SAE J525 Welded and Cold Drawn Low-Carbon Steel Tubing Annealed for Bending and Flaring SAE J533 Flares for Tubing SAE
13、J1065 Nominal Reference Working Pressures for Steel Hydraulic Tubing SAE J1677 Tests and Procedures for Steel and Copper Nickel Tubing SAE J2467 Welded and Cold-Drawn, SAE 1021 Carbon Steel Tubing Normalized for Bending and Flaring 2.1.2 ISO Publications Available from ANSI, 25 West 43rd Street, New
14、 York, NY 10036-8002, Tel: 212-642-4900, www.ansi.org.ISO 10763 Plain-end, seamless and welded steel tubesDimensions and nominal working pressures ISO 19879 Metallic tube connections for fluid power and general useTest methods for hydraulic fluid power connections2.2 Related Publications The followi
15、ng publications are provided for informational purposes only and are not a required part of this document. 2.2.1 SAE Publications Available from SAE International, 400 Commonwealth Drive, Warrendale, PA 15096-0001, Tel: 877-606-7323 (inside USA and Canada) or 724-776-4970 (outside USA), www.sae.org.
16、SAE J514 Hydraulic Tube Fittings SAE J518 Hydraulic Flanged Tube, Pipe, and Hose Connections, Four-Bolt Split Flange Type SAE J1392 Steel, High Strength, Hot Rolled Sheet and Strip, Cold Rolled Sheet, and Coated Sheet SAE J1453 FittingO-Ring Face Seal SAE J2551 Recommended Practices for Fluid Conduc
17、tor Metallic Tubing Applications SAE J2833 Welded and Cold-Drawn, High Strength (690 MPa Tensile Strength) Low Alloy Steel Hydraulic Tubing, Stress Relieved Annealed for Bending and Flaring SAE J2614 Revised SEP2009 Page 3 of 72.2.2 ISO Publications Available from ANSI, 25 West 43rd Street, New York
18、, NY 10036-8002, Tel: 212-642-4900, www.ansi.org.ISO 3304 Plain end seamless precision steel tubesTechnical conditions for delivery ISO 3305 Plain end welded precision steel tubesTechnical conditions for delivery ISO 4200 Plain end steel tubes, welded and seamlessGeneral tables of dimensions and mas
19、ses per unit length ISO 4397 Connectors and associated componentsNominal outside diameters of tubes and nominal inside diameters of hoses ISO 4399 Connectors and associated componentsNominal pressures ISO 5598 Fluid power systems and componentsVocabulary ISO 6162 Four-screw split-flange connections
20、ISO 6163 Round flange, 8 and 12 screw connections ISO 6164 Four-screw, one-piece square-flange connections ISO 6605 Tests and test procedures ISO 8434 Metallic tube connections for fluid power and general use ISO 10583 Test methods for tube connections 2.2.3 EN Publications Available from ANSI, 25 W
21、est 43rd Street, New York, NY 10036-8002, Tel: 212-642-4900, www.ansi.org.EN 10305-2 Steel tubes for precision applicationsTechnical delivery conditionsPart 2: Welded cold drawn tubesEN 10305-3 Steel tubes for precision applicationsTechnical delivery conditionsPart 3: Welded cold sized steel tubesEN
22、 10305-4 Steel tubes for precision applicationsTechnical delivery conditionsPart 4: Seamless cold drawn tubes for hydraulic and pneumatic power systems EN 10305-6 Steel tubes for precision applicationsTechnical delivery conditionsPart 6: Welded cold drawn steel tubes for hydraulic and pneumatic powe
23、r systems 2.2.4 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 A 513 Standard Specification for Electric-Resistance-Welded Carbon and Alloy Steel Tubing SAE J2614 Revised SEP2009 Page 4
24、 of 73. MANUFACTURE The tubing shall be made from a single strip of steel shaped into a tubular shape, the edges of which are joined and fused by electric resistance welding.The tubing shall be sub-critically annealed via a controlled method to produce a finished product, which will meet all require
25、ments of this document. 3.1 Sub-Critically Anneal An annealing treatment in which steel is heated to below the A1 temperature, then slowly cooled to room temperature. A1 temperature is the critical transformation temperature depending on steel classification. 4. DIMENSIONS AND TOLERANCES The toleran
26、ces applicable to tubing outside diameter are shown in Table 1. The tolerances applicable to tubing wall thickness are shown in Table 2. Particular attention shall be given to areas adjacent to the weld to insure against thin spots and/or sharp indentations. TABLE 1 - TUBING OUTSIDE DIAMETER TOLERAN
27、CE Nominal Tubing OD(1)(2)mmTube OD and ID Tolerance mmUp to 10 0.05 Over 10 to 16 0.06 Over 16 to 50 0.08 Over 50 to 60 0.10 Over 60 to 80 0.13 Over 80 to 110 0.15 1. OD measurements shall be taken at least 50 mm from the end of tubing. 2. For nominal tubing ODs to be used in conjunction with this
28、tubing, refer to the various fluid carrier connector standards and SAE J533 for recommended maximum nominal wall thickness for double flaring.TABLE 2 - TUBING WALL THICKNESS TOLERANCES Wall Thickness RangemmFor Nominal TubingOutside Diameter Through 22 mm (1)mmFor Nominal tubingOutside Diameter Over
29、 22 mm Through 48 mm (1)mmUp to 0.8 0.05 0.05 Over 0.8 to 2.4 0.05 + 0.05 -0.08 Over 2.4 to 3.3 + 0.05 -0.08 + 0.05 -0.10 Over 3.3 to 3.7 + 0.05 -0.10 Over 3.7 to 4.5 + 0.08 -0.10 Over 4.5 to 5.5 0.10 Over 5.5 + 0.10 -0.15 1. Plus tolerances include allowance for crown on flat-rolled steel.SAE J2614
30、 Revised SEP2009 Page 5 of 75. MANUFACTURING STANDARDS 5.1 Straightness Tubing shall be straightened to a tolerance of 0.8 mm in 1000 mm. Straightness tolerances shall be measured by placing a 1000 mm straight edge against the tube while lying on its neutral axis. The point of maximum deflection of
31、the tube from the straight edge should not be more than allowed by the specification when measured with a feeler gauge. 5.2 Tubing End Condition The tubing will be produced using normal mill cut off practices. This shall include, but not limited to, punch-cut ends, double-cut ends and rotary-cut end
32、s. Care shall be taken to minimize the distortion of the tube ends. Distortion of the tube must not affect the normal re-cutting processes that will be performed by the end user. Ends that require further processing will be addressed by agreement between the producer and the tube purchaser. 5.3 Fini
33、sh The outside surface finish of the tube is critical to prevent possible leak paths on double flare connections, mechanical formed connections or applications where the outside surface of the tube becomes the sealing surface of the finished connection. The outside surface finish of the tube shall b
34、e free of excessive roll marks, score marks, chatter marks or other surface imperfections that may be considered detrimental to the function of the finished tube. 5.4 Thermal Treatment The tubing is to be sub-critically annealed by heating to a temperature below the transformation point and then slo
35、wly cooled to room temperature. Special attention to the mechanical properties, especially the Rockwell B85 Hardness Target, should be made to produce tubing suitable for bending and forming for hydraulic pressure applications. However, to obtain acceptable hardness characteristics, the yield streng
36、th and the tensile strength shall not be compromised and 30% minimum elongation shall be maintained.6. MATERIAL The tubing shall be made from alloy steel strip conforming to the chemical composition in Table 3. The steel shall be made by the open-hearth basic oxygen or electric furnace process. A la
37、dle analysis of each heat shall be made to determine the percentages of the elements specified. The chemical composition thus determined shall be reported to the purchaser or purchasers representative, if requested, and shall be conform to the requirements specified. If a check analysis is required,
38、 the tolerances shall be as specified in SAE J409, Table 3. TABLE 3 - CHEMICAL REQUIREMENTS Element Cast or Heat Analysis, Weight % Carbon 0.18 Max Manganese 1.50 Max Sulfur 0.035 Phosphorus 0.035 Max Silicon 0.35 Aluminum 0.020 Min Micro Alloying Elements 0.15 Max SAE J2614 Revised SEP2009 Page 6 o
39、f 77. MECHANICAL PROPERTIES The finished tubing shall have mechanical properties as shown in Table 4. TABLE 4 - MECHANICAL PROPERTIES Properties Values Yield Strength, Minimum 345 MPa Tensile Strength, Minimum 500 MPa Elongation in 50 mm, Minimum 30% Minimum Hardness Target Rockwell B85(1)Hardness M
40、aximum Rockwell B90(1)1. The hardness test shall not be required on tubing with a nominal wall thickness of less than 1.65 mm. Such tubing shall meet all other mechanical properties and performance requirements. 8. PERFORMANCE REQUIREMENTS The finished tubing shall satisfactorily meet the following
41、performance tests. All tests are to be conducted in accordance with the procedures in SAE J1677. 8.1 Flattening Test See SAE J1677. 8.2 Flaring Test See SAE J1677. 8.3 Reverse Flattening Test See SAE J1677. 8.4 Expansion Test See SAE J1677. 8.5 Hardness Test See SAE J1677. 8.6 Tensile Test See SAE J
42、1677. 8.7 Elongation Test See SAE J1677. 8.8 Pressure Proof Test See SAE J1677. 8.9 Nondestructive Electronic See SAE J1677. The tests referenced in SAE J1677, paragraph 5.9, are to be conducted after all cold-working tube manufacturing operations are performed on the tubing. SAE J2614 Revised SEP20
43、09 Page 7 of 79. TEST CERTIFICATES A certificate of compliance to the performance requirements shall be furnished to the purchaser by the producer if requested in the purchase agreement. The tube producer shall be able to certify that each heat lot of the material used to produce the tubing complies
44、 with the performance requirements. 10. CLEANLINESS The inside and outside surfaces of the finished tubing shall be commercially bright, clean and free from grease, oxide scale, carbon deposits and any other contamination that can not readily be removed by cleaning agents normally used in manufactur
45、ing plants. 11. CORROSION PROTECTION The inside and outside surfaces of the finished tubing shall be protected against corrosion during shipment and normal storage. If a corrosion preventive compound is applied, it shall be such that after normal periods, it can be readily removed by cleaning agents
46、 normally used in manufacturing plants. 12. PACKAGING The tubing is to be packaged in such a way to allow it to be transported and stored, with normal care, without being damaged. Any special packaging shall be by agreement between the producer and the purchaser. 13. NOTES 13.1 Marginal Indicia A ch
47、ange bar (I) located in the left margin is for the convenience of the user in locating areas where technical revisions, not editorial changes, have been made to the previous issue of this document. An (R) symbol to the left of the document title indicates a complete revision of the document, including technical revisions. Change bars and (R) are not used in original publications, nor in documents that contain editorial changes only. PREPARED BY THE SAE METALLIC TUBING COMMITTEE OF THE SAE FLUID CONDUCTORS AND CONNECTORS TECHNICAL STEERING COMMITTEE
