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 revised, reaffirmed, stabilized, or cancelled. SAE invites your written comments and suggestions.Copyright 2016 SAE InternationalAll rights reserved. No part of this publi
3、cation may 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: +1 724-776-4970 (out
4、side USA)Fax: 724-776-0790Email: CustomerServicesae.orgSAE WEB ADDRESS: http:/www.sae.orgSAE values your input. To provide feedbackon this Technical Report, please visithttp:/www.sae.org/technical/standards/J526_201611SURFACE VEHICLESTANDARDJ526 NOV2016Issued 1952-01Revised 2016-11Superseding J526 N
5、OV2010Welded Low-Carbon Steel Tubing Suitable for Bending, Flaring, Beading, Forming and BrazingRATIONALEThis five year review of the SAE J526 standard incorporates revisions requested by producers, fabricators and users of the material type. The updates include the following:xA revised applicable a
6、nd related documents listing,xSection 5.1 straightness requirement and wording revised,xRevised wording of section 5.2, tube end condition,xRevised wording of section 5.3, surface condition,xClarification note added to sections 8.4 and 8.xRevised section 9, test certificates,xAdding note to section
7、11, corrosion protection,xRevised verbiage to comply with FCCTC Standardized Language Document1. SCOPEThe SAE J526 Standard covers electric-resistance welded single-wall low-carbon steel pressure tubing intended for general automotive, refrigeration, hydraulic, and other similar applications requiri
8、ng tubing of a quality suitable for bending, flaring, beading, forming, and brazing. Material produced to this specification is not intended to be used for single flare applications due to the potential leak path that would be caused by the ID weld bead or scarfed region. Assumption of risks when us
9、ing this material for single flare applications shall be defined by agreement between the producer and tube purchaser. The material produced to this specification is intended to service pressure applications where severe forming and bending is not required. As this material may exhibit mechanical pr
10、operties that reduce some desired forming characteristics versus SAE J356, the severity of the forming requirements of the finished assembly should be considered when utilizing material produced to this specification. 2. REFERENCES2.1 Applicable DocumentsThe following publications form a part of thi
11、s specification to the extent specified herein. Unless otherwise indicated, the latest issue of SAE publications shall apply.SAE INTERNATIONAL J526 NOV2016 Page 2 of 62.1.1 SAE PublicationsAvailable from SAE International, 400 Commonwealth Drive, Warrendale, PA 15096-0001, Tel: 877-606-7323 (inside
12、USA and Canada) or +1 724-776-4970 (outside USA), www.sae.org.SAE J356 Welded Flash-Controlled Low-Carbon Steel Tubing Normalized for Bending, Double Flaring, and BeadingSAE J403 Chemical Compositions of SAE Carbon SteelsSAE J409 Product Analysis-Permissible Variations from Specified Chemical Analys
13、is of a Heat or Cast of SteelSAE J514 Hydraulic Tube FittingsSAE J533 Flares for TubingSAE J1677 Tests and Procedures for Carbon Steel and Low Alloy Steel Tubing2.2 Related PublicationsThe following publications are provided for information purposes only and are not a required part of this SAE Techn
14、ical Report.2.2.1 SAE PublicationsAvailable 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 J516 Hydraulic Hose FittingsSAE J1065 Nominal Reference Working Pressures for Steel Hydra
15、ulic TubingSAE J1290 Automotive Hydraulic Brake System - Metric Tube ConnectionsSAE J1453-1 Specification for O-Ring Face Seal Connectors: Part 1 Tube Connection Details and Common Requirements for Performance and TestsSAE J1453-2 Specification for O-Ring Face Seal Connectors: Part 2 Requirements, D
16、imensions, and Tests For Steel Unions, Bulkheads, Swivels, Braze Sleeves, Braze-on Tube Ends, Caps, and Connectors with ISO 6149-2Metric Stud Ends and ISO 6162 4-Bolt Flange HeadsSAE J1453-3 Specification for O-Ring Face Seal Connectors: Part 3 Requirements, Dimensions, and Tests for Steel Unions, B
17、ulkheads, Swivels, Braze Sleeves, Caps, and Connectors with SAE J1926-2 Inch Stud EndsSAE J2551-1 Recommended Practices for Fluid Conductor Carbon, Alloy and High Strength Low Alloy Steel Tubing Applications-Part 1: Design and FabricationSAE J2551-2 Recommended Practices for Fluid Conductor Carbon,
18、Alloy and High Strength Low Alloy Steel Tubing Applications-Part 2: General Specifications and Performance RequirementsSAE J2551-3 Recommended Practices for Fluid Conductor Carbon, Alloy and High Strength Low Alloy Steel Tubing Applications-Part 3: Procurement SAE J2592Carbon Steel Tubing for Genera
19、l Use - Understanding Nondestructive Testing for Carbon Steel TubingSAE INTERNATIONAL J526 NOV2016 Page 3 of 62.2.2 ISO PublicationsCopies of these documents are available online at http:/webstore.ansi.org/ISO 3305 Plain End Welded Precision Steel Tubes-Technical Conditions for DeliveryISO 5598 Flui
20、d Power Systems and Components - VocabularyISO 8434-2 Metallic Tube Connections for Fluid Power and General Use - Part: 2 37o Flare FittingsISO 8434-3 Metallic tube connections for fluid power and general use - Part: 3 ORFS fittingsISO 10583 Hydraulic Fluid Power - Test Methods for Tube ConnectionsI
21、SO 10763 Hydraulic Fluid Power - Plain-End, Seamless and Welded Steel Tubes - Dimensions and Nominal Working PressuresISO 19879 Metallic tube connections for fluid power and general use - Test methods for hydraulic fluid power connectionsEN 10305-3 Welded Cold Sized Steel Tubes for Precision Applica
22、tionsJIS G 3454 Welded Carbon Steel Pipes for Pressure Service2.2.2 ASTM PublicationsAvailable 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 Electric-Resistance-Welded Carbon and Alloy Steel TubingASTM A 45
23、0/A 450M Standard Specifications for General Requirements for Carbon, Ferritic Alloy and Austenitic Alloy Steel Tubing3. MANUFACTUREThe tubing shall be made from a single strip of steel shaped into a tubular form, the edges of which are joined and fused by electric resistance welding. After welding,
24、 the outside flash shall be removed to provide a smooth round surface and the tubing shall be processed in such a manner as to produce a finished product that shall meet all requirements of this document. Typically, this type of tubing is available in both coiled and straight condition. 4. DIMENSION
25、S AND TOLERANCESThe tolerances applicable to tubing outside diameter are shown in Table 1. The tolerances applicable to tubing wall thickness are shown in Table 2. Particular attention should be given to areas adjacent to the weld to insure against thin spots and/or sharp indentations. SAE INTERNATI
26、ONAL J526 NOV2016 Page 4 of 6Table 1 - Tube outside diameter tolerancesNominal Tubing OD(mm)Outside Diameter tolerance( mm)3.18 0.05over 3.18 to 11.10 0.08over 11.10 to 19.05 0.10over 19.05 to 50.80 0.13over 50.80 to 63.50 0.15over 63.50 to 76.20 0.20over 76.20 to 88.90 0.231. Other diameter sizes m
27、ay be specified by agreement between the producer and purchaser.2. The actual outside diameter shall be the average of the maximum and minimum outside diameters as determined at any one cross section through the tubing.Table 2 - Tube wall thickness tolerancesNominal Tubing Wall thickness(mm)Nominal
28、Tubing Wall tolerance( m)0.64 to 0.76 0.08over 0.76 to 0.89 0.09over 0.89 to 1.25 0.11over 1.25 to 1.65 0.15over 1.65 to 2.50 0.201. The tolerances listed represent the maximum permissible deviation at any point.2. Diameters 3.18 mm up to and including 4.76 mm may have a wall tolerance of 0.13 mm5.
29、MANUFACTURING STANDARDS5.1 StraightnessTubing produced as straight lengths shall be straightened to a tolerance of 1.0 mm over a 1000 mm length. This tolerance may be waived if agreed upon between the producer and purchaser as documented in the purchase agreement. This tolerance does not apply to tu
30、bing supplied as coiled product. 5.2 Tubing End ConditionThe tubing shall be produced using normal mill cut-off practices, e.g. punch-cut ends, double cut ends or rotary-cut ends. Tube end distortion must be minimized; end condition shall not affect normal re-cut processes performed by the end user.
31、 Extraordinary end cut processing requirements shall be defined by agreement between the producer and purchaser. 5.3 Surface ConditionSurface imperfections such as handling marks, die marks, or shallow pits shall not be considered injurious defects provided such imperfections are not detrimental to
32、the function of the tubing and these imperfections are within the tolerances specified for diameter and wall thickness. The removal of such surface imperfections is not required. A slight weld bead and splatter on the inside surface shall be permissible but must be held to the minimum consistent wit
33、h good welding practice. Special weld bead requirements shall be defined by agreement between the producer and purchaser.SAE INTERNATIONAL J526 NOV2016 Page 5 of 66. MATERIAL.Tubing shall be made from low-carbon, flat rolled sheet steel conforming to the chemical composition shown in Table 3. The st
34、eel shall be made by the basic oxygen or electric furnace process. A ladle 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 representative, if requested. If a check analysis is
35、required, the tolerances shall be as specified in SAE J409, Table 3.Table 3 - Chemical requirementsElementCast or Heat Analysis, Weight %Carbon 0.18 maxManganese 0.60 maxPhosphorus 0.035 maxSulfur 0.035 max7. MECHANICAL PROPERTIESThe finished tubing shall have mechanical properties as tabulated in T
36、able 4.Table 4 - Mechanical requirementsProperties ValuesYield Strength, min (0.2% offset) 170 MPaTensile Strength, min 290 MPaElongation in 50 mm 14% minHardness (Rockwell 30 T scale), max 65(1), (2)1. The hardness test shall not be required on tubing with a nominal wall thickness of less than 1.65
37、 mm. Such tubing shall meet all other mechanical properties and performance requirements.2. Specified hardness does not apply to the heat affected area of the weld zone.8. PERFORMANCE REQUIREMENTSThe finished tubing shall satisfactorily meet the following performance tests as conducted in accordance
38、 with the procedures outlined in SAE J1677. 8.1 Flaring Test8.2 Hardness Test8.3 Bending Test8.4 Pressure Proof TestNOTE: Pressure Proof Test performed when agreed upon between the purchaser and the producer 8.5 Nondestructive Electric TestNOTE: Nondestructive Electronic Test is to be conducted afte
39、r all cold-working tube manufacturing operations are performed on the tubing.SAE INTERNATIONAL J526 NOV2016 Page 6 of 68.6 Flattening Test8.7 Expansion Test8.8 Tensile TestRevisions to these testing requirements shall be agreed upon between the producer and purchaser and documented in the purchase a
40、greement.9. TEST CERTIFICATESA certificate of compliance to the performance requirements shall be furnished to the purchaser by the producer if requested in the purchase agreement. The producer shall be able to certify that each heat lot and unique production run of tubing complies with the performa
41、nce requirement.10. CLEANLINESSThe inside of tubing shall be clean and free from any contamination that will impair the processing or serviceability of the tubing. Additional cleanliness level expectations shall be agreed upon between the producer and purchaser and documented in the purchase agreeme
42、nt.11. CORROSION PROTECTIONThe inside and outside 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 storage periods it can readily be removed by cleaning agents normally us
43、ed in manufacturing. A specific corrosion resistant coating may be specified by the purchaser.12. PACKAGINGThe tubing shall be packaged in such a way to allow it to be transported and stored, with normal care, without being damaged. Any special packaging requirements shall be by agreement between th
44、e producer and the purchaser13. NOTES13.1 Revision IndicatorA change bar (l) 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
