EN 12168:2016

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 12168:2016SIST EN 12168:2016en,fr,de01-oktober-2016SIST EN 12168:2016SLOVENSKI
STANDARDSIST EN 12168:20111DGRPHãþD

EUROPEAN STANDARD NORME EUROPÉENNE EUROPÄISCHE NORM
EN 12168
July
t r s x ICS
y yä s w rä u r Supersedes EN
s t s x zã t r s sEnglish Version
Copper and copper alloys æ Hollow rod for free machining purposes Cuivre et alliages de cuivre æ Barres creuses pour décolletage
Kupfer und Kupferlegierungen æ Hohlstangen für die spanende Bearbeitung This European Standard was approved by CEN on
{ April
t r s xä
egulations which stipulate the conditions for giving this European Standard the status of a national standard without any alterationä Upætoædate lists and bibliographical references concerning such national standards may be obtained on application to the CENæCENELEC Management Centre or to any CEN memberä
translation under the responsibility of a CEN member into its own language and notified to the CENæCENELEC Management Centre has the same status as the official versionsä
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t r s x CEN All rights of exploitation in any form and by any means reserved worldwide for CEN national Membersä Refä Noä EN
s t s x zã t r s x ESIST EN 12168:2016

Figures Figure 1 — Examples of hollow rod cross-sections .8 Figure 2 — Measurement of twist of polygonal hollow rod . 17
Tables Table 1 — Composition of low alloyed copper alloys . 21 Table 2 — Composition of copper-zinc alloys. 22 Table 3 — Composition of copper-zinc-lead alloys . 23 Table 4 — Composition of complex copper-zinc alloys . 26 Table 5 — Mechanical properties of low alloyed copper alloys . 27 Table 6 — Mechanical properties of copper-zinc alloys . 28 Table 7 — Mechanical properties of copper-zinc-lead alloys . 31 Table 8 — Mechanical properties of complex copper-zinc alloys . 34 Table 9 — Tolerances on external diameter or width across-flats. 38 Table 10 — Tolerances on wall thickness . 38 Table 11 — Tolerances on diameter of the bore . 38 Table 12 — Tolerances on eccentricity . 39 Table 13 — Tolerances on straightness of hollow rod . 39 Table 14 — Tolerances on length of hollow rod . 39 Table 15 — Corner radii for hollow rod with square, hexagonal or octagonal external shape . 39 Table 16 — Maximum twist for hollow rod with square, hexagonal or octagonal external shape . 40 Table 17 — Sampling rate . 40 SIST EN 12168:2016

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 [SOURCE: EN 12163:2016, 3.2, modified — The definition was adapted.] 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.): −=×+max.min.max.min.100ssess Note 1 to entry: For polygons, wall thickness is measured perpendicular to the mid-points of the flat outside surfaces. SIST EN 12168:2016

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) mass of product required; 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) DW for compliance in the chemical composition according to the 4 MS Common Composition List. This information is mandatory in the case in which the product is used for drinking water applications according to the 4 MS Common Composition List and not to be given in other cases; g) nominal cross-sectional dimensions or, in the case of hollow profiles, by a fully dimensioned and toleranced drawing: To define the nominal cross-sectional dimensions of a hollow rod, a purchaser should state one of the following: 1) the external dimensions and the wall thickness (tolerances given in Tables 9 and 10); or SIST EN 12168:2016
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