SIST EN ISO 28319:2010
(Main)Dentistry - Laser welding (ISO 28319:2010)
Dentistry - Laser welding (ISO 28319:2010)
This International Standard specifies requirements and test methods for laser welding, in the dental laboratory, of materials suitable for use in metallic restorations and appliances.
Zahnheilkunde - Eingnung von metallischen Werkstoffen zum Laserschweissen (ISO 28319:2010)
Diese Internationale Norm legt Anforderungen und Prüfverfahren für das Laserschweißen von Werkstoffen im
zahntechnischen Labor fest, die für den Einsatz als Zahnersatz und Vorrichtungen aus Metall geeignet sind.
Art dentaire - Soudage par laser (ISO 28319:2010)
L'ISO 28319:2010 spécifie les exigences et les méthodes d'essai destinées à la soudure au laser, en laboratoire dentaire, de matériaux utilisables dans les restaurations métalliques et leurs applications.
Zobozdravstvo - Varjenje z laserjem (ISO 28319:2010)
Ta mednarodni standard določa zahteve in preskusne metode za varjenje materialov, primernih za uporabo pri kovinskih obnovah in dodatkih, z laserjem v zobozdravstvenem laboratoriju.
General Information
Relations
Standards Content (Sample)
SLOVENSKI STANDARD
SIST EN ISO 28319:2010
01-oktober-2010
Zobozdravstvo - Varjenje z laserjem (ISO 28319:2010)
Dentistry - Laser welding (ISO 28319:2010)
Zahnheilkunde - Eingnung von metallischen Werkstoffen zum Laserschweissen (ISO
28319:2010)
Art dentaire - Soudage par laser (ISO 28319:2010)
Ta slovenski standard je istoveten z: EN ISO 28319:2010
ICS:
11.060.10 =RERWHKQLþQLPDWHULDOL Dental materials
SIST EN ISO 28319:2010 en
2003-01.Slovenski inštitut za standardizacijo. Razmnoževanje celote ali delov tega standarda ni dovoljeno.
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SIST EN ISO 28319:2010
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SIST EN ISO 28319:2010
EUROPEAN STANDARD
EN ISO 28319
NORME EUROPÉENNE
EUROPÄISCHE NORM
May 2010
ICS 11.060.10
English Version
Dentistry - Laser welding (ISO 28319:2010)
Médecine bucco-dentaire - Soudage par laser (ISO Zahnheilkunde - Laserschweißen (ISO 28319:2010)
28319:2010)
This European Standard was approved by CEN on 12 May 2010.
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 alteration. Up-to-date lists and bibliographical references concerning such national
standards may be obtained on application to the CEN 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 translation
under the responsibility of a CEN member into its own language and notified to the CEN 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,
Finland, France, Germany, Greece, Hungary, Iceland, Ireland, Italy, Latvia, Lithuania, Luxembourg, Malta, Netherlands, Norway, Poland,
Portugal, Romania, Slovakia, Slovenia, Spain, Sweden, Switzerland and United Kingdom.
EUROPEAN COMMITTEE FOR STANDARDIZATION
COMITÉ EUROPÉEN DE NORMALISATION
EUROPÄISCHES KOMITEE FÜR NORMUNG
Management Centre: Avenue Marnix 17, B-1000 Brussels
© 2010 CEN All rights of exploitation in any form and by any means reserved Ref. No. EN ISO 28319:2010: E
worldwide for CEN national Members.
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SIST EN ISO 28319:2010
EN ISO 28319:2010 (E)
Contents Page
Foreword .3
2
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SIST EN ISO 28319:2010
EN ISO 28319:2010 (E)
Foreword
This document (EN ISO 28319:2010) has been prepared by Technical Committee ISO/TC 106 "Dentistry" in
collaboration with Technical Committee CEN/TC 55 “Dentistry” the secretariat of which is held by DIN.
This European Standard shall be given the status of a national standard, either by publication of an identical
text or by endorsement, at the latest by November 2010, and conflicting national standards shall be withdrawn
at the latest by November 2010.
Attention is drawn to the possibility that some of the elements of this document may be the subject of patent
rights. CEN [and/or CENELEC] shall not be held responsible for identifying any or all such patent rights.
According to the CEN/CENELEC Internal Regulations, the national standards organizations of the following
countries are bound to implement this European Standard: Austria, Belgium, Bulgaria, Croatia, Cyprus, Czech
Republic, Denmark, Estonia, Finland, France, Germany, Greece, Hungary, Iceland, Ireland, Italy, Latvia,
Lithuania, Luxembourg, Malta, Netherlands, Norway, Poland, Portugal, Romania, Slovakia, Slovenia, Spain,
Sweden, Switzerland and the United Kingdom.
Endorsement notice
The text of ISO 28319:2010 has been approved by CEN as a EN ISO 28319:2010 without any modification.
3
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SIST EN ISO 28319:2010
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SIST EN ISO 28319:2010
INTERNATIONAL ISO
STANDARD 28319
First edition
2010-05-15
Dentistry — Laser welding
Médecine bucco-dentaire — Soudage par laser
Reference number
ISO 28319:2010(E)
©
ISO 2010
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SIST EN ISO 28319:2010
ISO 28319:2010(E)
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ii © ISO 2010 – All rights reserved
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SIST EN ISO 28319:2010
ISO 28319:2010(E)
Contents Page
Foreword .iv
1 Scope.1
2 Normative references.1
3 Terms and definitions .1
4 Requirements.2
4.1 Chemical composition .2
4.2 Biocompatibility.2
4.3 Mechanical strength of laser-welded joint (tensile strength) .2
4.4 Corrosion resistance.3
5 Sampling.3
6 Preparation of specimens.3
6.1 General .3
6.2 Specimens for tensile testing .4
6.3 Specimens for corrosion testing .5
7 Testing.5
7.1 Visual inspection .5
7.2 Chemical composition .5
7.3 Tensile testing .5
7.4 Corrosion testing by static immersion.6
8 Information and instructions.7
9 Marking and labelling.7
9.1 Marking.7
9.2 Labelling.7
10 Test report.8
Annex A (informative) Quality assurance of laser welding .9
Bibliography.13
© ISO 2010 – All rights reserved iii
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SIST EN ISO 28319:2010
ISO 28319:2010(E)
Foreword
ISO (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 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 matters of electrotechnical standardization.
International Standards are drafted in accordance with the rules given in the ISO/IEC Directives, Part 2.
The main task of technical committees is to prepare International Standards. Draft International Standards
adopted by the technical committees are circulated to the member bodies for voting. Publication as an
International Standard requires approval by at least 75 % of the member bodies casting a vote.
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 such patent rights.
ISO 28319 was prepared by Technical Committee ISO/TC 106, Dentistry, Subcommittee SC 2, Prosthodontic
materials.
iv © ISO 2010 – All rights reserved
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SIST EN ISO 28319:2010
INTERNATIONAL STANDARD ISO 28319:2010(E)
Dentistry — Laser welding
1 Scope
This International Standard specifies requirements and test methods for laser welding, in the dental laboratory,
of materials suitable for use in metallic restorations and appliances.
2 Normative references
The following referenced documents are indispensable for the application of this document. For dated
references, only the edition cited applies. For undated references, the latest edition of the referenced
document (including any amendments) applies.
ISO 1942, Dentistry — Vocabulary
ISO 3585, Borosilicate glass 3.3 — Properties
ISO 3696, Water for analytical laboratory use — Specification and test methods
ISO 6344-1, Coated abrasives — Grain size analysis — Part 1: Grain size distribution test
ISO 10271, Dental metallic materials — Corrosion test methods
ISO 22674:2006, Dentistry — Metallic materials for fixed and removable dental restorations and appliances
3 Terms and definitions
For the purposes of this document, the terms and definitions given in ISO 1942, ISO 22674 and the following
apply.
3.1
laser welding
method for joining similar or dissimilar metallic materials, using a laser beam as heat source, with or without a
metallic filler material (welding rod), which produces coalescence by melting the metallic materials in order to
join them by creating a fusion zone
3.2
brazing
method for joining similar or dissimilar metallic materials by applying heat and using a metallic brazing
material as filler
NOTE 1 The brazing materials used have liquidus temperatures above 450 °C, but below the melting range of the
metallic materials being joined. They flow by capillary action into the gap between the metallic base materials and join
them by creating a metallurgical bond.
NOTE 2 Brazing differs from welding in that brazing does not melt the metallic base materials.
© ISO 2010 – All rights reserved 1
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SIST EN ISO 28319:2010
ISO 28319:2010(E)
4 Requirements
4.1 Chemical composition
4.1.1 Metallic materials to be joined
The metallic materials to be joined shall comply with ISO 22674:2006, 5.1 and 5.2.
4.1.2 Filler material
4.1.2.1 Chemical composition
For all elements that are present in excess of 1,0 % (mass fraction), the percentage by mass of each of the
constituent elements shall be declared by the manufacturer and shall be reported to a precision of 0,1 %
(mass fraction). Any element that is present in a concentration in excess of 0,1 % (mass fraction), but not in
excess of 1,0 % (mass fraction), shall be identified either by name or symbol.
4.1.2.2 Permitted deviation from the reported composition
For silver-based or noble-metal-based filler materials, the percentage of each of the constituents shall not
deviate by more than 0,5 % (mass fraction) from the values stated in the manufacturer's instructions for use.
For base-metal-based filler materials, all elements present with more than 20 % (mass fraction) shall not
deviate from the value stated in the manufacturer's instructions for use by more than 2 % (mass fraction).
Those present in excess of 1 % (mass fraction) but not in excess of 20 % (mass fraction) shall not deviate
from the value stated in the manufacturer's instructions for use by more than 1 % (mass fraction).
Testing shall be carried out in accordance with 7.2.
4.1.3 Hazardous elements in filler material
4.1.3.1 Recognised hazardous elements
For the purposes of this International Standard, the elements nickel, cadmium, beryllium and lead are
designated to be hazardous elements.
4.1.3.2 Permitted limits for hazardous elements
The filler material shall not contain more than 0,02 % (mass fraction) of cadmium or beryllium or lead. If the
filler material contains more than 0,1 % (mass fraction) of nickel, the percentage shall not exceed the amount
indicated on the package or label or insert.
Testing shall be carried out in accordance with 7.2.
4.2 Biocompatibility
Specific qualitative and quantitative requirements for freedom from biological hazard are not included in this
International Standard, but it is recommended that, in assessing possible biological hazards, reference should
be made to ISO 10993-1 and ISO 7405.
4.3 Mechanical strength of laser-welded joint (tensile strength)
The tensile strength of laser-welded specimens shall exceed 350 MPa. If the 0,2 % proof strength of either
one or both of the metallic materials to be joined by laser welding is below 350 MPa, the tensile strength shall
exceed the lower 0,2 % proof strength of the two.
Testing shall be carried out in accordance with 7.3.
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SIST EN ISO 28319:2010
ISO 28319:2010(E)
4.4 Corrosion resistance
4.4.1 Static immersion test
The corrosion resistance of laser welded specimens shall be in the same range as that of the metallic
materials to be joined. The ion release shall not exceed twice that of the metallic material. If two different
metallic materials are joined, the ion release shall not exceed twice that of the metallic material with the lesser
corrosion resistance. The metallic materials to be joined and the laser-welded specimens shall comply with
ISO 22674:2006, 5.6.
Testing shall be carried out in accordance with 7.4.
4.4.2 Appearance after corrosion exposure
Magnified visual comparison prior to and after corrosion testing shall not reveal any visible selective corrosion
in the vicinity of the laser weld.
Testing shall be carried out in accordance with 7.4.
5 Sampling
The metallic filler material and the metallic material shall each be from one lot and shall be sufficient to
prepare the specimens as required in 6.1 and 6.2, including provision for a second set for tensile testing.
Further samples and packaging materials shall be made available for inspection in accordance with 9.2.
If the proof strength values of 0,2 % non-proportional extension of the one or two metallic materials to be
joined by laser welding are available from a test report in accordance with ISO 22674, these data can be used.
If not, perform the tests in accordance with ISO 22674 to determine the required proof strength values of
0,2 % non-proportional extension.
6 Preparation of specimens
6.1 General
The specimens consist of the metallic materials joined by laser welding either with or without using a filler
material according to the manufacturer's instructions. Prepare casating alloy specimens by the "lost wax
process" of investment casting. If the manufacturer recommends a forming method other than casting, use
this method to assess
...
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