SIST EN 12168:2011
(Main)Copper and copper alloys - Hollow rod for free machining purposes
Copper and copper alloys - Hollow rod for free machining purposes
The document specifies the composition, property requirements and dimensional tolerances for copper alloy rod supplied in straight lengths, specifically intended for free machining applications.Note: Hollow products having an outside diameter greater than 80 mm, and/or a wall thickness less than 2 mm, are specified in EN 12449. The sampling procedures and the methods of test for verification of conformity to the requirements of the document, and the delivery conditions are also specified.
Kupfer und Kupferlegierungen - Hohlstangen für die spanende Bearbeitung
Diese Europäische Norm legt die Zusammensetzung, die Anforderungen an die Eigenschaften und die Grenzabmaße für durch Ziehen oder Pressen endgefertigte Hohlstangen, aus Kupferlegierungen für die spanende Bearbeitung fest. ANMERKUNG Hohlstangen mit einem Außendurchmesser über 80 mm und/oder einer Wanddicke unter 2 mm sind in EN 12449 festgelegt. Der Ablauf der Probenentnahme und die Prüfverfahren zur Feststellung der Übereinstimmung mit den Anforderungen dieser Norm sind ebenfalls festgelegt.
Cuivre et alliages de cuivre - Barres creuses pour décolletage
La présente Norme européenne spécifie la composition, les caractéristiques et les tolérances dimensionnelles des barres creuses en alliage de cuivre fabriquées par étirage ou filage, particulièrement conçues pour le décolletage.
NOTE Les produits creux de diamètre extérieur supérieur à 80 mm et/ou d'épaisseur inférieure à 2 mm sont traités dans l’EN 12449.
Les procédures d'échantillonnage et les méthodes d'essai pour la vérification de la conformité aux prescriptions de la présente Norme européenne sont également spécifiées.
Baker in bakrove zlitine - Votle palice za obdelavo z odrezovanjem na avtomatih
Dokument določa sestavo, zahteve za lastnosti in odstopke mer za ravne palice iz bakrovih zlitin, posebej za obdelavo z odrezovanjem na avtomatih. Opomba: Votle izdelke z zunanjim premerom, ki presega 80 mm, in/ali debelino stene pod 2 mm določa EN 12449. Določeni so tudi postopki vzorčenja in metode preskušanja za preverjanje skladnosti z zahtevami tega dokumenta ter pogoji dostave.
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Standards Content (Sample)
2003-01.Slovenski inštitut za standardizacijo. Razmnoževanje celote ali delov tega standarda ni dovoljeno.Baker in bakrove zlitine - Votle palice za obdelavo z odrezovanjem na avtomatihKupfer und Kupferlegierungen - Hohlstangen für die spanende BearbeitungCuivre et alliages de cuivre - Barres creuses pour décolletageCopper and copper alloys - Hollow rod for free machining purposes77.150.30Bakreni izdelkiCopper productsICS:Ta slovenski standard je istoveten z:EN 12168:2011SIST EN 12168:2011en,fr,de01-oktober-2011SIST EN 12168:2011SLOVENSKI
STANDARDSIST EN 12168:1999/A1:2002SIST EN 12168:19991DGRPHãþD
SIST EN 12168:2011
EUROPEAN STANDARD NORME EUROPÉENNE EUROPÄISCHE NORM
EN 12168
June 2011 ICS 77.150.30 Supersedes EN 12168:1998English Version
Copper and copper alloys - Hollow rod for free machining purposes
Cuivre et alliages de cuivre - Barres creuses pour décolletage
Kupfer und Kupferlegierungen - Hohlstangen für die spanende Bearbeitung This European Standard was approved by CEN on 14 April 2011.
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-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 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, 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 © 2011 CEN All rights of exploitation in any form and by any means reserved worldwide for CEN national Members. Ref. No. EN 12168:2011: ESIST EN 12168:2011
EN 12168:2011 (E) 2 Contents Page Foreword .4Introduction .61Scope .72Normative references .73Terms and definitions .74Designations .84.1Material .84.1.1General .84.1.2Symbol .84.1.3Number .94.2Material condition .94.3Product .95Ordering information . 106Requirements . 126.1Composition . 126.2Mechanical properties . 126.3Resistance to dezincification . 126.4Residual stress level . 126.5Dimensions and tolerances . 126.5.1Diameter or width across-flats . 126.5.2Tolerance on wall thickness . 126.5.3Eccentricity . 126.5.4Shape tolerances . 136.5.5Straightness . 136.5.6Length . 136.5.7Corner radii . 136.5.8Twist of polygonal hollow rod . 137Sampling . 147.1General . 147.2Analysis . 147.3Mechanical tests . 147.4Dezincification resistance and stress corrosion resistance tests . 148Test methods . 158.1Analysis . 158.2Tensile test . 158.2.1General . 158.2.2Location of test pieces . 158.2.3Shape and size of test pieces . 158.2.4Procedure for testing . 158.2.5Determination of results . 158.3Hardness test . 168.4Dezincification resistance test . 168.5Stress corrosion resistance test . 168.6Retests . 168.6.1Analysis, tensile, hardness and dezincification resistance tests . 168.6.2Stress corrosion resistance test . 168.7Rounding of results . 16SIST EN 12168:2011
EN 12168:2011 (E) 3 9Declaration of conformity and inspection documentation . 179.1Declaration of conformity . 179.2Inspection documentation . 1710Marking, packaging, labelling . 17Annex A (normative)
Determination of mean depth of dezincification . 28A.1Introduction . 28A.2Procedure . 28A.3Expression of results . 28Bibliography . 30 Figures Figure 1 — Examples of hollow rod cross-sections . 8 Figure 2 — Measurement of twist of polygonal hollow rod . 14 Figure A.1 — Example of contiguous fields . 29
Tables Table 1 — Composition of low alloyed copper alloys . 17 Table 2 — Composition of copper-zinc alloys . 18 Table 3 — Composition of copper-zinc-lead alloys . 19 Table 4 — Composition of complex copper-zinc alloys . 20 Table 5 — Mechanical properties of low alloyed copper alloys . 21 Table 6 — Mechanical properties of copper-zinc alloys . 22 Table 7 — Mechanical properties of copper-zinc-lead alloys . 23 Table 8 — Mechanical properties of complex copper-zinc alloys . 24 Table 9 — Tolerances on external diameter or width across-flats . 25 Table 10 — Tolerances on wall thickness . 25 Table 11 — Tolerances on diameter of the bore . 25 Table 12 — Tolerances on eccentricity . 26 Table 13 — Tolerances on straightness of hollow rod . 26 Table 14 — Tolerances on length of hollow rod . 26 Table 15 — Corner radii for hollow rod with square, hexagonal or octagonal external shape . 26 Table 16 — Maximum twist for hollow rod with square, hexagonal or octagonal external shape . 27 Table 17 — Sampling rate . 27
SIST EN 12168:2011
EN 12168:2011 (E) 4 Foreword This document (EN 12168:2011) has been prepared by Technical Committee CEN/TC 133 “Copper and copper alloys”, 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 December 2011, and conflicting national standards shall be withdrawn at the latest by December 2011. 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. This document supersedes EN 12168:1998. Within its programme of work, Technical Committee CEN/TC 133 requested CEN/TC 133/WG 4 "Extruded and drawn products, forgings and scrap" to revise the following standard: EN 12168, Copper and copper alloys — Hollow rod for free machining purposes. This is one of a series of European Standards for the copper and copper alloy products rod, wire and profile. Other products are specified as follows: EN 12163, Copper and copper alloys — Rod for general purposes; EN 12164, Copper and copper alloys — Rod for free machining purposes; EN 12165, Copper and copper alloys — Wrought and unwrought forging stock; EN 12166, Copper and copper alloys — Wire for general purposes; EN 12167, Copper and copper alloys — Profiles and bars for general purposes; EN 13347, Copper and copper alloys — Rod and wire for welding and braze welding; EN 13601, Copper and copper alloys — Copper rod, bar and wire for general electrical purposes; EN 13602, Copper and copper alloys — Drawn round copper wire for the manufacture of electrical conductors; EN 13605, Copper and copper alloys — Copper profiles and profiled wire for electrical purposes. In comparison with EN 12168:1998, the following significant technical changes were made: a) Removal of four materials: 1) CuZn38Pb4 (CW609N) and CuZn37Pb1 (CW605N); 2) CuZn36Pb2Sn1 (CW711R) and CuZn37Pb1Sn1 (CW714R); b) Addition of five new materials: 1) CuZn40 (CW509L), CuZn42 (CW510L) and CuZn38As (CW511L) due to market requirements on restriction of lead; SIST EN 12168:2011
EN 12168:2011 (E) 5 2) CuZn32Pb2AsFeSi (CW709R); 3) CuZn21Si3P (CW724R) due to market requirements on restriction of lead; c) Revision of the mechanical properties (Tables 5 to 8) to reflect market needs; in particular the tensile strength, the 0,2 % proof strength and the elongation that were previously informative are now mandatory since these are important figures for design purposes; d) Modification of the sampling rate (Table 17). 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.
SIST EN 12168:2011
EN 12168:2011 (E) 6 Introduction The European Committee for Standardization (CEN) draws attention to the fact that it is claimed that compliance with this document may involve the use of a patent concerning the alloy CuZn21Si3P (CW724R) given in 6.1. CEN takes no position concerning the evidence, validity and scope of this patent right. The holder of this patent right has assured the CEN that he is willing to negotiate licenses under reasonable and non-discriminatory terms and conditions with applicants throughout the world. In this respect, the statement of the holder of this patent right is registered with CEN. Information may be obtained from: Wieland Werke AG Graf Arco Straße 36
D-89079 Ulm
Attention is drawn to the possibility that some of the elements of this document may be the subject of patent rights other than those identified above. CEN shall not be held responsible for identifying any or all such patent rights. SIST EN 12168:2011
EN 12168:2011 (E) 7 1 Scope This European Standard specifies the composition, property requirements and dimensional tolerances for copper alloy hollow rod, finally produced by drawing or extruding, specifically intended for free machining purposes. NOTE Hollow products having an outside diameter greater than 80 mm and/or a wall thickness less than 2 mm are specified in EN 12449. The sampling procedures, the methods of test for verification of conformity to the requirements of this European Standard, are also specified. 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. EN 1173, Copper and copper alloys — Material condition designation EN 1412, Copper and copper alloys — European numbering system EN 1655, Copper and copper alloys — Declarations of conformity EN 10204:2004, Metallic products — Types of inspection documents EN 14977, Copper and copper alloys — Detection of tensile stress – 5 % ammonia test EN ISO 6506-1, Metallic materials — Brinell hardness test — Part 1: Test method (ISO 6506-1:2005) EN ISO 6509:1995, Corrosion of metals and alloys — Determination of dezincification resistance of brass (ISO 6509:1981) EN ISO 6892-1, Metallic materials — Tensile testing — Part 1: Method of test at room temperature
(ISO 6892-1:2009) ISO 1190-1, Copper and copper alloys — Code of designation — Part 1: Designation of materials ISO 6957, Copper alloys — Ammonia test for stress corrosion resistance 3 Terms and definitions For the purposes of this document, the following terms and definitions apply. 3.1 hollow rod straight product, of uniform cross-section along its whole length with an enclosed void for which the longitudinal axes of its external contour and its internal contour, which is the boundary with the enclosed void, are coincidental NOTE The external and internal contours of the rod, at any cross-section, can be that of a circle, square, rectangle, hexagon, or octagon, or with slight modification of those basic shapes by inclusion of detail(s) of relatively small size to the remainder of the cross-section. Examples of hollow rod cross-sections are shown in Figure 1. SIST EN 12168:2011
EN 12168:2011 (E) 8
Figure 1 — Examples of hollow rod cross-sections 3.2 deviation from circular form difference between the maximum and the minimum outside diameters measured at any one cross-section of the product NOTE Adapted from EN 12163:2011. 3.3 eccentricity difference between the maximum and the minimum wall thickness, measured in the same cross-section perpendicular to the axis of the hollow rod, expressed as a percentage of the sum of the maximum and minimum wall thicknesses (smax. and smin.): e = 100.min.max.min.max×+−ssss NOTE For polygons, wall thickness is measured perpendicular to the mid-points of the flat outside surfaces. 4 Designations 4.1 Material 4.1.1 General The material is designated either by symbol or number (see Tables 1 to 4). 4.1.2 Symbol The material symbol designation is based on the designation system given in ISO 1190-1. SIST EN 12168:2011
EN 12168:2011 (E) 9 NOTE Although material symbol designations used in this standard might be the same as those in other standards using the designation system given in ISO 1190-1, the detailed composition requirements are not necessarily the same. 4.1.3 Number The material number designation is in accordance with the system given in EN 1412. 4.2 Material condition For the purposes of this standard, the following designations, which are in accordance with the system given in EN 1173, apply for the material condition: M Material condition for the product as manufactured without specified mechanical properties; R. Material condition designated by the minimum value of tensile strength requirement for the product with mandatory tensile property requirements; H. Material condition designated by the minimum value of hardness requirement for the product with mandatory hardness requirements; S (suffix)
Material condition for a product which is stress relieved. NOTE Products in the M or H. material condition may be specially processed (i.e. mechanically or thermally stress relieved) in order to lower the residual stress level to improve the resistance to stress corrosion and the dimensional stability on machining [see 5 l), 5 m) and 8.4]. Except when the suffix S is used, material condition is designated by only one of the above designations. 4.3 Product The product designation provides a standardized pattern of designation from which a rapid and unequivocal description of a product is conveyed in communication. It provides mutual comprehension at the international level with regard to products which meet the requirements of the relevant European Standard. The product designation is no substitute for the full content of the standard. The product designation for products to this standard shall consist of: a) denomination (hollow rod); b) number of this European Standard (EN 12168); c) material designation, either symbol or number (see Tables 1 to 4); d) material condition designation (see Tables 5 to 8); e) external and/or internal cross-sectional shape (the following designations shall be used as appropriate: RND for round, SQR for square, RCT for rectangular, HEX for hexagonal, OCT for octagonal, PFL for profile); f) nominal cross-sectional dimensions (see NOTE 1 to Clause 5) or, for profiles, the number of the profile or a fully dimensioned and toleranced drawing, and: 1) tolerance class A, B or C added to the external dimension (see Table 9); and/or 2) tolerance class A or B added to the bore diameter (see Table 11); g) wall thickness (the following designation shall be used for wall thickness: WT) (see Table 10); SIST EN 12168:2011
EN 12168:2011 (E) 10 h) for square, hexagonal or octagonal external shape, the corner shape (the following designations shall be used as appropriate: SH for sharp, RD for rounded) (see Table 15). A typical product designation is shown in EXAMPLE 1, and the derivation of a product designation is shown in EXAMPLE 2. EXAMPLE 1 Hollow rod for free machining purposes conforming to this standard, in material designated either CuZn39Pb3 or CW614N, in material condition H090, round external shape and bore, nominal outside diameter 40 mm, tolerance Class B, and nominal wall thickness 10 mm shall be designated as follows:
Hollow rod EN 12168 — CuZn39Pb3 — H090 — RND40B × WT10
or
Hollow rod EN 12168 — CW614N — H090 — RND40B × WT10 EXAMPLE 2 Hollow rod for free machining purposes conforming to this standard, in material designated either CuZn39Pb3 or CW614N, in material condition H090, hexagonal external shape, 60 mm nominal width across-flats dimension, tolerance Class A, round bore of nominal diameter 20 mm, tolerance Class B sharp corners, shall be designated as follows:
Hollow rod EN 12168 — CuZn39Pb3 — H090 — HEX60A × RND20B — SH
or
Hollow rod EN 12168 — CW614N
— H090 — HEX60A × RND20B —SH Denomination Number of European Standard
Material designation
Material condition designation
Cross-sectional shape, nominal cross-sectional dimensions in millimetres, tolerance class for each dimension
Corner designation
5 Ordering information In order to facilitate the enquiry, order and confirmation of order procedures between the purchaser and the supplier, the purchaser shall state on his enquiry and order the following information: a) quantity of product required (mass); b) denomination (hollow rod); c) number of this European Standard (EN 12168); d) material designation (see Tables 1 to 4); e) material condition designation (see 4.2 and Tables 5 to 8) if it is other than M; f) nominal cross-sectional dimensions or, in the case of hollow profiles, by a fully dimensioned and toleranced drawing; SIST EN 12168:2011
EN 12168:2011 (E) 11 NOTE 1 To define the nominal cross-sectional dimensions of a hollow rod, a purchaser should state one of the following: the external dimensions and the wall thickness (tolerances given in Tables 9 and 10); or the internal dimensions and the wall thickness (tolerances given in Tables 11 and 10); or the external and internal dimensions (tolerances given in Tables 9 and 11) and the maximum eccentricity (tolerances given in Table 12); or the external and internal dimensions (tolerances given in Tables 9 and 11) and the wall thickness (tolerances given in Table 10). g) whether: 1) class A, B or C tolerances are to apply to external dimensions (see Table 9); and/or 2) class A or B tolerances are to apply to internal dimensions (see Table 11); unless the choice of these tolerance classes is to be left to the discretion of the supplier; h) for hollow rod having a square, hexagonal or octagonal external shape, whether "sharp" or "rounded" corners are required unless the corner radii of the rod are to be left to the discretion of the supplier (see 6.5.7 and Table 13); i) length of product required. Normally hollow rod is supplied to "nominal length" tolerances (see 6.5.6 and Table 12); NOTE 2 It is recommended that the product designation, as described in 4.3, is used for items b) to h). In addition, the purchaser shall also state on the enquiry and order any of the following, if required: j) whether the products are required to pass a stress corrosion resistance test. If so which test method is to be used (see 8.5), if the choice is not to be left to the discretion of the supplier. If the purchaser chooses ISO 6957, the pH value for the test solution is to be selected; k) whether the products are to be supplied in a thermally stress relieved material condition; l) whether a declaration of conformity is required (see 9.1); m) whether an inspection document is required, and if so, which type (see 9.2); n) whether there are any special requirements for marking, packaging or labelling (see Clause 10). EXAMPLE Ordering details for 1 000 kg of hollow rod for free machining purposes conforming to EN 12168, in material designated either CuZn39Pb3 or CW614N, in material condition H090, round external shape, nominal outside diameter 40 mm, tolerance class B, and nominal wall thickness 10 mm, tolerance class A, nominal length 3 000 mm:
1 000 kg Hollow rod EN 12168 — CuZn39Pb3 — H090 — RND40B ×××× WT10A
— nominal length 3 000 mm
or
1 000 kg Hollow rod EN 12168 — CW614N — H090 — RND40B ×××× WT10A
— nominal length 3 000 mm SIST EN 12168:2011
EN 12168:2011 (E) 12 6 Requirements 6.1 Composition The composition shall conform to the requirements for the appropriate material given in Tables 1 to 4. 6.2 Mechanical properties The properties shall conform to the appropriate requirements given in Tables 5 to 8. The tests shall be carried out in accordance with 8.2 or 8.3. 6.3 Resistance to dezincification The maximum depth of dezincification of CuZn38As (CW511L), CuZn36Pb2As (CW602N), CuZn32Pb2AsFeSi (CW709R) and CuZn21Si3P (CW724R) products shall be 100 µm for wall thicknesses up to 8 mm. For greater sizes the average depth of dezincification shall be less than 100 µm and the maximum measured value shall be less than 200 µm.
The test shall be carried out in accordance with 8.4. Products in CuZn21Si3P (CW724R) that have passed the test shall be marked with “Si”. NOTE Products in the alloys CuZn38As (CW511L), CuZn36Pb2As (CW602N) ) and CuZn32Pb2AsFeSi (CW709R) may be subjected to heat treatment in the range 450 °C to 550 °C during manufacture. If the user needs to heat the material above 530 °C during subsequent processing then advice should be sought from the supplier. 6.4 Residual stress level Products ordered and supplied in the stress relieved condition (see NOTE to 4.2) shall show no evidence of cracking when tested. The tests shall be carried out in accordance with 8.5. 6.5 Dimensions and tolerances 6.5.1 Diameter or width across-flats When specified by the purchaser (see NOTE 1 to Clause 5), the external diameter or width across-flats shall conform to the tolerances given in Table 9. NOTE The external diameter of a hollow rod with circular cross-section is calculated as the mean of one or more pairs of measurements taken a
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