EN 1172-2011 pdf download.Copper and copper alloys-Sheet and strip for building purposes.
6 Requirements
6.1 CompositIon
The composition shall conform to the requirements for the appropnate malenal given in Table I
6.2 Mechanical prop.rtles
The mechanical properties (tensile strength, 0.2 % proof strength. elongation and Vickers har&ess) shal conform
to the appropriate requirements gtven i Table 2. The tests shal be carried out n accordance with 8.2 and 8.3.
6.3 Surface quality
The surface quality of sheet and strip shea be consistent with the manufacturing process, I.e. smooth, dean and free from marked discdoi-abon Surface irregulanties. such as striahons in the irecbon of rolling, marks whdi have been rolled over, mmci scratches, flaking. abrasion marks or residues of coolants and kibricants are permitted unless they mpar workabafity and senceabdity.
For special applications, (e.g where sheet or sVip is intended for use as external wall dadding (facade quabty)). the requirements to be met by the surface quality shall be agreed between the purchaser and the supplier at the time of enquiry and order
6.4 DImensions and tolerances
6.4.1 ThIckness, width, length and coIl inside diameter
The standardised nominal thicknesses. widths, lengths arid coil inside cameters available are even in Table 3.
Thickness, width and length shall conform to the dimensional tolerances given en Table 3.
6.4.2 Straghtness of longitudinal edges (edgewise curvature)
6.4.2.1 General
The tolerances on straightness of longitudinal edges are given in 6.4.2.2 and 64,2.3.
For speoal applications (e.g. where sheet or strip Is intended for use as external wall cladding (facade quality)), the straightness requirements shall be agreed between the purchaser and the supplier.
6.4.22 Sheet
For sheet Lip to and including 3000 mm length. the tolerance on straightness of longitudinal edges shall be not
more thai, 1 mm per 1000 mm gauge length, nor more than 3mm for a gauge length of 3 000 mm.
64.2.3 StrIp
The straightness tolerance of the longitudinal edges shall be not more than 1 mm per 1 000 mm gauge length, nor more than 5 mm for a gauge length 0(5000 mm
6.4.3 Flatness
The flatness snaP conform to the tolerances given in Table 4, except for material cona.tlons R220 or H040
Strip need not meet any requirements for flatness in the direction of rolling, since, when unrolled after reeling, there is always some residual curvature
For special apphc.ations. (e.g. where sheet or strip Is intended for use as external wall cladding (facade quality)), the flatness requilements shall be agreed between the purchaser and the supplier.
6.4.4 Squareness of sheet
The squareness shal conform to the tolerances given in Table 5.
6.5 Mass per unit length
The mass per unit length shall be calcuLated from the nornwial sizes of the sheet or strip and from the density of the material given in Table 1.
NOTE Values for mass per iiiit length are given en Table 3 for sibmation only 0eviet,n from these values can result from tolerances on ro.mnal sizes and variation of density whidi Is depender on the covnpos4ion of the material
7 Sampling
7.1 Analysis
Sampling, selection of test samples and preparation of test pieces shall be in accordance with ISO 1811-2.
Analysis shal be carried out on the test pieces, or test portions, prepared from the test samples ot*alned in accordance with 7.1. Except rn cases of dispute, the analytical methods used shall be at the discretion of the supplier. For expression of results, the rounding rules given In 8.5 shall be used.
NOTE fri cases of dispute ncemrng the resub of an&ys. the methods of analysis to be used should brn acirdance w,th the appivpñale ISO standards
8.2 TensIle test
The tensile strength, 02 % proof sb’ength and elongation shal be determined in accordance With EN ISO 6892-1
on the test pieces prepared from the test samples obtained in accordance with 72.
8.3 Hardness test
The Vickers hardness shall be determined in accordance with EN ISO 6507-1 or EN ISO 6507-2 as appropnate on the test pieces prepared from the test samples obtarned In accordance with 7.2.
8.4 Retests
If there s a fadure of one, or more than one, of the tests In 8.1, 8.2 or 83, two test samples from the same inspection lot shal be permitted to be selected for retesling the failed property (properties). One of these lest samples shall be taken from the same sarnpkng unit as that from which the original failed test piece was taken. unless that sampling unit is no longer available, or has been withdrawn by the suppler.
If the lest pieces from both test samples pass the appropriate Lest(s), then the inspection lot represented shall be deemed to conform to the particular requirement(s) of this standard. If a test piece fads a test, the inspection lot represented shall be deemed not to conform to this standard,
8.5 Rounding of results
For the purposes of determining conformity to the limits specified m this standard, an observed or a calculated value obtained from a lest shall be rounded In accordance with the following procedure. which is based upon the guidance given in Annex B of ISO 80000-1 2009. II shall be rounded in one step to the same number of figures used to express the specified limit in this standard except that for tensile strength and 0,2 $ proof strength the rounding interval shall be 10.
The following rules shall be used for roundlng
a) if the figure immediately after the lest figure to be retained is less than 5. the last figure to be retained shall be kept unchanged
b) if Uie figure immediately after the last figure to be retained is equal to or greater than 5.EN 1172-2011 pdf download.