BS-1845-1984.pdf
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1、BRITISH STANDARD BS 1845:1984 Specification for Filler metals for brazing UDC 621.791.36.042/.046 Licensed Copy: sheffieldun sheffieldun, na, Fri Nov 24 06:19:47 GMT+00:00 2006, Uncontrolled Copy, (c) BSI BS 1845:1984 This British Standard, having been prepared under the direction of the Welding Sta
2、ndards Committee, was published under the authority of the Board of BSI and comes into effect on 30 April 1984 BSI 03-1999 First published February 1952 First revision December 1966 Second revision April 1977 Third revision April 1984 The following BSI references relate to the work on this standard:
3、 Committee reference WEE/19 Draft for comment 82/78741 DC ISBN 0 580 13588 8 Committees responsible for this British Standard The preparation of this British Standard was entrusted by the Welding Standards Committee (WEE/-) to Technical Committee WEE/19 upon which the following bodies were represent
4、ed: BNF Metals Technology Centre British Association for Brazing and Soldering British Non-ferrous Metals Federation Electricity Supply Industry in England and Wales Heating and Ventliating Contractors Association Joint Industry Board for Services in England and Wales Plumbing Trades Union Welding I
5、nstitute Coopted members Amendments issued since publication Amd. No.Date of issueComments Licensed Copy: sheffieldun sheffieldun, na, Fri Nov 24 06:19:47 GMT+00:00 2006, Uncontrolled Copy, (c) BSI BS 1845:1984 BSI 03-1999i Contents Page Committees responsibleInside front cover Forewordii 1Scope1 2C
6、omposition of material1 3Vacuum applications1 4Quality control1 5Marking1 6Manufacturers certificate2 Appendix A Filler metals for vacuum brazing and/or high vacuum applications11 Appendix B References to health and safety publications11 Table 1 Group AL: aluminium brazing filler metals3 Table 2 Gro
7、up AG: silver brazing filler metals4 Table 3 Group CP: copper-phosphorus brazing filler metals5 Table 4 Group CU: copper brazing filler metals6 Table 5 Group CZ: copper-zinc brazing filler metals7 Table 6 Group HTN: nickel and cobalt brazing filler metals8 Table 7 Group PD: palladium bearing brazing
8、 filler metals9 Table 8 Group AU: gold bearing brazing filler metals10 Table 9 Filler metals for vacuum brazing and/or high vacuum applications11 Publications referred toInside back cover Licensed Copy: sheffieldun sheffieldun, na, Fri Nov 24 06:19:47 GMT+00:00 2006, Uncontrolled Copy, (c) BSI BS 18
9、45:1984 ii BSI 03-1999 Foreword This revision of this British Standard, which has been prepared under the direction of the Welding Standards Committee, supersedes BS 1845:1977, which is withdrawn, and reflects the developments that have taken place since that earlier edition was published. This has
10、resulted in more types being included particularly for aluminium and copper-phosphorus brazing filler metals although some silver brazing filler metals have also been changed. Some minor changes in composition have been made and these have largely concerned impurity limits. Beryllium and cadmium lim
11、its in particular have been adjusted as part of a wider look at the safety aspects of brazing. In this revision the material designations for aluminium alloys have been changed to those used in the International Alloy Designation System for Wrought Aluminium and Wrought Aluminium Alloys, which has b
12、een adopted in the United Kingdom and is now used in other British Standards. This system is administered by the Aluminium Association Inc., who issued the “Registration Record of International Alloy Designations and Chemical Composition Limits for Wrought Aluminum and Wrought Aluminum Alloys”. Simi
13、larly the type designations for nickel and cobalt base brazing filler metals have been changed so that the numbers generally correspond with the American Welding Society Standard ANSI/AWS A5 8-81. Reference should be made to BS 1723 for details regarding the use of the various filler metals specifie
14、d in this standard; but if in doubt, advice should be sought from the supplier as to the suitability of a particular filler metal for the material being brazed and the service conditions involved. It has been assumed in the drafting of this British Standard that the execution of its provisions is en
15、trusted to appropriately qualified and experienced people. A British Standard does not purport to include all the necessary provisions of a contract. Users of British Standards are responsible for their correct application. Compliance with a British Standard does not of itself confer immunity from l
16、egal obligations. Summary of pages This document comprises a front cover, an inside front cover, pages i and ii, pages 1 to 12, an inside back cover and back cover. This standard has been updated (see copyright date) and may have had amendments incorporated. This will be indicated in the amendment t
17、able on the inside front cover. Licensed Copy: sheffieldun sheffieldun, na, Fri Nov 24 06:19:47 GMT+00:00 2006, Uncontrolled Copy, (c) BSI BS 1845:1984 BSI 03-19991 1 Scope This British Standard specifies a range of filler metals used for brazing and lays down requirements regarding the quality cont
18、rol system at the manufacturers works. The filler metals are grouped under the following headings: Filler metals for vacuum applications are given separately in Appendix A. NOTEThe titles of the publications referred to in this standard are listed on the inside back cover. 2 Composition of material
19、The filler metal shall be in accordance with one of the compositions shown in Table 1 to Table 8. Filler metal, including any brazing consumable in which it may be supplied, shall be free from any inclusions and contaminants likely to impair the flow of the filler metal. NOTE 1The melting and, where
20、 given, application ranges of the filler metals given in the last columns of the tables are for general information only. NOTE 2Brazing filler metals are available as rod, wire, foil (or preforms made from them) or powder or as a constituent of a flux or binder paste, etc. The form of the material s
21、hould be the subject of agreement between the purchaser and the supplier. 3 Vacuum applications Filler metals of the silver, gold, or palladium type to be used for brazing parts for service under high vacuum conditions shall comply with the special impurity limits given in Table 9 in Appendix A. Whe
22、re there is a preference for high purity filler metals for vacuum brazing applications the filler metals given in Appendix A shall be used. Filler metal complying with the requirements of Appendix A shall have the letter V added to the designation of the filler metal type. NOTENickel and cobalt fill
23、er metals although used for vacuum brazing do not require special impurity limits. 4 Quality control1) The manufacturer shall have a quality control system to ensure that all filler metals (and brazing consumables containing them) supplied satisfy the requirements of this standard. The system shall
24、be documented and provide for the ready detection of discrepancies and for timely and positive corrective action. The system shall provide records such that the identification number of each batch of consumables shall provide references to the manufacturers own documented records. Tests and inspecti
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