This European Standard, a part of the BS EN series, specifies the method for tensile testing of metallic materials and defines the mechanical properties. It supersedes BS EN which is withdrawn. .. The European Standard EN “Metallic materials – Tensile testing – Part 1. Buy BS EN Tensile testing of metallic materials. Method of test at ambient temperature from SAI Global.
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The cross-section of the test pieces may be circular, square, rectangular, annular or, ba special cases, of some other shape. An approach for estimating the uncertainty of measurement using the “error budget” concept based upon the tolerances specified in the testing and calibration standards has been presented elsewhere  and was subsequently expanded to form the basis of the annex J of ISO .
In general, the diameter of the parallel length of machined cylindrical test pieces shall be not less than 4 mm. Discover simpler and smarter testing with features such as pre-loaded test methods, QuickTest in seconds, enhanced data exporting: The uncertainty budget presented here could be regarded as an upper bound to the measurement uncertainty for a laboratory undertaking testing in compliance with EN since it is possible that a laboratory could actually control some of the testing parameters to a better level of precision than that demanded by the standard, e.
In any case, it should be recommended that pertinent limits for the range can be selected by the user in order to eliminate senseless values of the slope of the curve in the elastic range.
It gives no confidence that the properties of the material tested are either correct or fit for purpose. If permission is granted, the terms may include royalty payments or a licensing agreement. After fracture, the broken test piece should be placed in a fixture and axial compressive force applied, preferably by means of a screw, sufficient to firmly hold the pieces together during measurement.
Email addresses must contain the symbol. Figure 10 — test pieces comprising a non-machined portion of the product see annex C Li ce ns ed C op y: In particular it provides the recommendations which should be taken into account in the software and testing conditions.
The determination of a quantitative value is only possible with a known force-extension curve, which implies the quantitative value being dependent on the material. The force is then increased again until it exceeds the value obtained originally. WaveMatrix 2 for Dynamic Testing. For example to capture ReH, the following formula may be used to determine the minimum sampling frequency: If such outputs are not provided, the machine manufacturer should give raw digital data with information how these raw digital data have been obtained and treated by the software.
The measurement is valid regardless of the position of the fracture cross-section if the percentage elongation after fracture is equal to or greater than the specified value.
The strain rate within the parallel length shall be kept as constant as possible. These recommendations are related to the design, the software of the machine and its validation and to the operating conditions of the tensile test.
In practice the requirements and tolerances of the present standard do not allow all the effects to be quantified. For very thin materials, it is recommended that strips of identical widths should be cut and assembled into a bundle with intermediate layers of a paper which is resistant to the cutting oil.
NOTE 2 In case where the machine is operating in strain rate control, the stress rate should be calculated taking into account the modulus of elasticity of the material.
The dimensions of this transition radius may be important and it is recommended that they be defined in the material specification if they are not given in the appropriate annex see 6. Check this box to receive pertinent commercial email from Instron focusing on products, upcoming events, and more! The original cross-sectional area of the length of tube or longitudinal or transverse strip may be determined from the mass of the test piece, the length of which has been measured, and from its density.
The nominal width of the test piece may be used, provided that the machining tolerances and tolerances on shape bbs in Table B. In principle, it will be necessary to determine any materials strain 1000-1 response before the total uncertainty budget can be calculated. Transverse or longitudinal test piece dimensions other than those given in annexes B and D can be specified in the product standard. The methods based on the calculation of the characteristics of a sliding segment are the most convenient.
EN Tensile Testing Metallic Materials – Instron
We recommend that you read and review the standard in full to ensure suitability for the products you wish to test before selecting test equipment. Buying standards Orders for all BSI, 100021- and foreign standards publications should be addressed to Customer Services.
The method used should be verifiable. Using a pair of needle-pointed dividers set at the gauge length, an 10002-11 is scribed with the mark as a centre. In principle, this measurement is only valid if fracture occurs within the extensometer 1002-1 length Le.
A second arc of the same radius should then be scribed from the original center, and the distance between the two scratches measured by means of a measuring microscope or other suitable instrument. These various documents all give guidance 10020-1 how to estimate uncertainty of measurement based upon an “uncertainty budget” concept.
Hence it is necessary to have a prior knowledge of a material’s tensile response to strain or stress rate before being able to calculate the measurement uncertainty. Typical results from various intercomparison exercises are given in J. A type A evaluation of uncertainty may be based on any valid statistical method for treating data. The length of the plug projecting relative to the grips of the machine in the direction of the gauge marks shall not bbs D, and its shape shall be such that it does not interfere with the gauge length deformation.
The Expression of Uncertainty and Confidence in Measurement.
BS EN 10002-1:2001
A type B evaluation is based on some other means ; Thus the use of tolerances specified in a standard comes under the type B category.
NOTE 2 100021 other methods are used, for example, injection of a pre-determined set of data from a known material sb a recognised level of quality assurance, these should meet the requirements above mentioned and of Table A. The following simplified equations can be used for longitudinal test pieces: Complementary em for computer controlled testing machines are indicated in the informative annex A to this standard.
Tensile strength, Rm, can also be strain rate dependent, however in practice it is usually determined at a much higher strain rate than Rp and is generally relatively insensitive to variations in the rapid strain rates.
This European Standard supersedes EN Today, this standard remains in common usage by industry, although it was withdrawn in August and replaced by ISO Special precautions bbs be taken when straightening the transverse test pieces.
Confidence may be placed in the efficiency of the machine computer processing, if differences between computer determined values and those determined by analogue means on the same test piece are small.
If n is the number of intervals between X and Y, the elongation after fracture is determined as follows: The marking of the initial gauge length L’o should be accurate to within 0,5 mm.
When this procedure is used, it should be recorded in the test report. The longitudinal strip is generally used for tubes with a wall thickness of more than 0,5 mm. This European Standard shall be given the status of a national standard, either by publication sb an identical text or by endorsement, at the latest by Januaryand conflicting national standards shall be withdrawn at be latest by January