1、BSI Standards PublicationBS EN ISO 14373:2015Resistance welding Procedure for spot weldingof uncoated and coated lowcarbon steelsBS EN ISO 14373:2015 BRITISH STANDARDNational forewordThis British Standard is the UK implementation of EN ISO 14373:2015. It supersedes BS EN ISO 14373:2007 which iswithd
2、rawn.The UK participation in its preparation was entrusted to Technical Committee WEE/-/1, Briefing committee for welding.A list of organizations represented on this committee can be obtained on request to its secretary.This publication does not purport to include all the necessary provisions of a c
3、ontract. Users are responsible for its correct application. The British Standards Institution 2015.Published by BSI Standards Limited 2015ISBN 978 0 580 79582 4 ICS 25.160.10 Compliance with a British Standard cannot confer immunity from legal obligations.This British Standard was published under th
4、e authority of the Standards Policy and Strategy Committee on 31 March 2015.Amendments/corrigenda issued since publicationDate T e x t a f f e c t e dEUROPEAN STANDARD NORME EUROPENNE EUROPISCHE NORM EN ISO 14373 March 2015 ICS 25.160.10 Supersedes EN ISO 14373:2007English Version Resistance welding
5、 - Procedure for spot welding of uncoated and coated low carbon steels (ISO 14373:2015) Soudage par rsistance - Mode opratoire pour le soudage par points des aciers bas carbone revtus et non revtus (ISO 14373:2015) Widerstandsschweien - Verfahren zum Punktschweien von niedriglegierten Sthlen mit ode
6、r ohne metallischem berzug (ISO 14373:2015) This European Standard was approved by CEN on 3 January 2015. CEN members are bound to comply with the CEN/CENELEC Internal Regulations which stipulate the conditions for giving this European Standard the status of a national standard without any alteratio
7、n. Up-to-date lists and bibliographical references concerning such national standards may be obtained on application to the CEN-CENELEC Management Centre or to any CEN member. This European Standard exists in three official versions (English, French, German). A version in any other language made by
8、translation under the responsibility of a CEN member into its own language and notified to the CEN-CENELEC Management Centre has the same status as the official versions. CEN members are the national standards bodies of Austria, Belgium, Bulgaria, Croatia, Cyprus, Czech Republic, Denmark, Estonia, F
9、inland, Former Yugoslav Republic of Macedonia, France, Germany, Greece, Hungary, Iceland, Ireland, Italy, Latvia, Lithuania, Luxembourg, Malta, Netherlands, Norway, Poland, Portugal, Romania, Slovakia, Slovenia, Spain, Sweden, Switzerland, Turkey and United Kingdom. EUROPEAN COMMITTEE FOR STANDARDIZ
10、ATION COMIT EUROPEN DE NORMALISATION EUROPISCHES KOMITEE FR NORMUNG CEN-CENELEC Management Centre: Avenue Marnix 17, B-1000 Brussels 2015 CEN All rights of exploitation in any form and by any means reserved worldwide for CEN national Members. Ref. No. EN ISO 14373:2015 EBS EN ISO 14373:2015EN ISO 14
11、373:2015 (E) 3 Foreword This document (EN ISO 14373:2015) has been prepared by IIW “International Institute of Welding“ incollaboration with Technical Committee CEN/TC 121 “Welding” the secretariat of which is held by DIN. This European Standard shall be given the status of a national standard, eith
12、er by publication of an identicaltext or by endorsement, at the latest by September 2015, and conflicting national standards shall bewithdrawn at the latest by September 2015. Attention is drawn to the possibility that some of the elements of this document may be the subject of patentrights. CEN and
13、/or CENELEC shall not be held responsible for identifying any or all such patent rights. This document supersedes EN ISO 14373:2007. According to the CEN-CENELEC Internal Regulations, the national standards organizations of the followingcountries are bound to implement this European Standard: Austri
14、a, Belgium, Bulgaria, Croatia, Cyprus, CzechRepublic, Denmark, Estonia, Finland, Former Yugoslav Republic of Macedonia, France, Germany, Greece,Hungary, Iceland, Ireland, Italy, Latvia, Lithuania, Luxembourg, Malta, Netherlands, Norway, Poland, Portugal,Romania, Slovakia, Slovenia, Spain, Sweden, Sw
15、itzerland, Turkey and the United Kingdom. Endorsement notice The text of ISO 14373:2015 has been approved by CEN as EN ISO 14373:2015 without any modification. BS EN ISO 14373:2015ISO 14373:2015(E)Foreword ivIntroduction v1 Scope . 12 Normative references 13 Terms and definitions . 24 Symbols and ab
16、breviated terms . 25 Materials . 35.1 Form . 35.2 Steel grades 36 Surface conditions 37 Edge conditions, form of component, and weld spacing . 38 Electrodes 38.1 Materials . 38.2 Dimensions . 38.3 Cooling of electrodes . 59 Weld assessment 69.1 General . 69.2 Weldability tests 69.3 Production tests
17、. 69.4 Frequency of testing . 610 Weld quality requirements 710.1 Weld diameter . 710.2 Weld penetration and indentation . 710.3 Failure description of welds 710.4 Tensile shear strength 710.5 Weld appearance . 810.5.1 Surface condition . 810.5.2 Distortion . 811 Multi-weld arrays . 9Annex A (inform
18、ative) Recommendations for spot welding equipment .11Annex B (informative) Typical spot welding conditions .12Annex C (informative) Partial list of steel types applicable to this International Standard 14Bibliography .15 ISO 2015 All rights reserved iiiContents PageBS EN ISO 14373:2015ISO 14373:2015
19、(E)ForewordISO (the International Organization for Standardization) is a worldwide federation of national standards bodies (ISO member bodies). The work of preparing International Standards is normally carried out through ISO technical committees. Each member body interested in a subject for which a
20、 technical committee has been established has the right to be represented on that committee. International organizations, governmental and non-governmental, in liaison with ISO, also take part in the work. ISO collaborates closely with the International Electrotechnical Commission (IEC) on all matte
21、rs of electrotechnical standardization.The procedures used to develop this document and those intended for its further maintenance are described in the ISO/IEC Directives, Part 1. In particular the different approval criteria needed for the different types of ISO documents should be noted. This docu
22、ment was drafted in accordance with the editorial rules of the ISO/IEC Directives, Part 2 (see www.iso.org/directives). Attention is drawn to the possibility that some of the elements of this document may be the subject of patent rights. ISO shall not be held responsible for identifying any or all s
23、uch patent rights. Details of any patent rights identified during the development of the document will be in the Introduction and/or on the ISO list of patent declarations received (see www.iso.org/patents). Any trade name used in this document is information given for the convenience of users and d
24、oes not constitute an endorsement.For an explanation on the meaning of ISO specific terms and expressions related to conformity assessment, as well as information about ISOs adherence to the WTO principles in the Technical Barriers to Trade (TBT) see the following URL: Foreword - Supplementary infor
25、mationISO 14373 was prepared by IIW, International Institute of Welding, Commission III. Requests for official interpretations of any aspect of this International Standard should be directed to the ISO Central Secretariat, who will forward them to the IIW Secretariat for an official response.This se
26、cond edition cancels and replaces the first edition (ISO 14373:2006), which has been technically revised to align it with ISO 17677-1.iv ISO 2015 All rights reservedBS EN ISO 14373:2015ISO 14373:2015(E)IntroductionThis International Standard no longer includes figures showing failure types and modes
27、 for tensile shear and cross tension testing in accordance with ISO 14329. ISO 2015 All rights reserved vBS EN ISO 14373:2015BS EN ISO 14373:2015Resistance welding Procedure for spot welding of uncoated and coated low carbon steels1 ScopeThis International Standard specifies requirements for resista
28、nce spot welding in the fabrication of assemblies of uncoated and metallic coated low carbon steel, comprising two or three sheets of metal, where the maximum single sheet thickness of components to be welded is within the range 0,4 mm to 3 mm, for the following materials: uncoated steels; hot-dip z
29、inc or iron-zinc alloy (galvannealed) coated steel; electrolytic zinc, zinc-iron, or zinc-nickel coated steel; aluminium coated steel; zinc-aluminium coated steel.This International Standard is applicable to welding of sheets of the same or dissimilar thickness, where the thickness ratio is less tha
30、n or equal to 3:1. It applies to the welding of three thicknesses, where the total thickness is less than or equal to 9 mm.Welding with the following types of equipment is within the scope of this International Standard:a) pedestal welding equipment;b) gun welders;c) automatic welding equipment wher
31、e the components are fed by robots or automatic feeding equipment;d) multi welders;e) robotic welders.Information on appropriate welding equipment is given in Annex A, and information on spot welding conditions is given in Annex B. This information is provided for guidance only.Depending on the serv
32、ice conditions of the fabrication, the type of welding equipment, the characteristics of the secondary circuit, the electrode material, and the shape, it is possible that certain modifications are necessary. In such cases, further information can be obtained from the relevant application standard, w
33、here one exists.The welding of organic coated or primer coated steels is not within the scope of this International Standard.2 Normative referencesThe following documents, in whole or in part, are normatively referenced in this document and are indispensable for its application. For dated references
34、, only the edition cited applies. For undated references, the latest edition of the referenced document (including any amendments) applies.ISO 5182, Resistance welding Materials for electrodes and ancillary equipmentISO 10447, Resistance welding Peel and chisel testing of resistance spot and project
35、ion weldsINTERNATIONAL STANDARD ISO 14373:2015(E) ISO 2015 All rights reserved 1BS EN ISO 14373:2015ISO 14373:2015(E)ISO 14270, Resistance welding Specimen dimensions and procedure for mechanized peel testing resistance spot, seam and embossed projection weldsISO 15609-5, Specification and qualifica
36、tion of welding procedures for metallic materials Welding procedure specification Part 5: Resistance weldingISO 15614-12, Specification and qualification of welding procedures for metallic materials Welding procedure test Part 12: Spot, seam and projection weldingISO 17677-1, Resistance welding Voca
37、bulary Part 1: Spot, projection and seam weldingISO 18278-1, Resistance welding Weldability Part 1: Assessment of weldability for resistance spot, seam and projection welding of metallic materialsISO 18272-2, Resistance welding Weldability Part 2: Alternative procedures for the assessment of sheet s
38、teels for spot welding3 Terms and definitionsFor the purposes of this document, the terms and definitions given in ISO 17677-1 and the following apply.3.1cross-tension testtest to determine the load-carrying capability of a spot welded joint subjected to cross tension loading3.2tensile shear testtes
39、t to determine the load-carrying capability of a spot welded joint subjected to shear tension loading3.3weld nuggetlenticular zone in a resistance weld, where metal from both (all) sheets has melted and resolidified3.4weld pitchcentre-to-centre distance between adjacent spot welds3.5edge distancedis
40、tance from the edge of the component to the centre of a weld4 Symbols and abbreviated termsSee Table 1.Table 1 Symbols and definitionsSymbol Term Dimensiondwweld diameter (see ISO 17677-1) mmdccorona bond diameter mmdeelectrode tip diameter mmdnnugget diameter mmt sheet thickness mmPstensile shear s
41、trength of a weld (TSS) kNRmultimate tensile strength of steel being welded MPa2 ISO 2015 All rights reservedBS EN ISO 14373:2015ISO 14373:2015(E)5 Materials5.1 FormThe steel shall be flat rolled, in coil or cut to length, and shall be free from harmful imperfections.5.2 Steel gradesA partial list o
42、f steel grades to which this International Standard is applicable is given in Annex C.6 Surface conditionsPrior to welding, all surfaces of components to be spot-welded shall be free from grease, scale, rust, paint, dirt, or excessive pitting. Uncoated hot rolled steel shall be in the pickled condit
43、ion. Coated steels can be supplied with a chromate or phosphate passivation treatment. Phosphated mild steel may be used in certain applications. These materials can be spot welded, although adjustment may be required to the welding parameters outlined in Annex B. Generally speaking, only thin phosp
44、hate pretreatment of steel is acceptable prior to spot welding.NOTE Certain surface treatments, such as the application of paint primers, rust preventatives, and oils, can be applied before welding, provided that the coating is uniform in thickness and it has been shown that consistent welds conform
45、ing to this International Standard can be obtained. Excessive use of surface pretreatment reduces the length of electrode life.7 Edge conditions, form of component, and weld spacingThe components to be welded shall be free from any burrs or other defects which may interfere with interface contact in
46、 some way, or which may necessitate excessive force in fitting the parts together.The shape of the component should be such that there is satisfactory interfacial contact in the area where the welds are to be made. The edge distance should not be less than 1,25 dw(see Figure 1), where dwis the weld
47、diameter as defined in 8.2. The use of edge distances less than the recommended values influences weld quality adversely. In such cases, the nominal weld size specified may be less than that given in 8.2, and therefore due allowance is needed for a lower weld strength (see 10.4).The distance between
48、 adjacent spot welds (see Figure 1) should not be less than 16 t, and preferably greater. Tolerances for the distance between the centres of two adjacent spot welds should not exceed 10 %, provided that it does not fall below the minimum value.8 Electrodes8.1 MaterialsThe electrode materials shall b
49、e a copper alloy and should possess high thermal and electrical conductivity. They should comply with, and be used in accordance with, ISO 5182.8.2 DimensionsThe welding electrodes should be of sufficient cross sectional area and strength to carry the welding current and electrode force without overheating, excessive deformation, or excessive deflection.The electrode dimensions should conform to ISO 5184 for straight electrodes, ISO 5830 for male electrode caps, and ISO 5821 for female electrode caps, as applicable. I
