INDUSTRY NEWS BSI Standards revision


Tensile testing. Method of test at room temperature. The standard which is part of the ISO 6892 suite brings together the European and international methods of testing metallic materials at ambient conditions.


B


In 2009, ISO 6892-1 introduced Method A, the method of test control based on maintaining a strain rate. The more traditional method, now referenced as Method B, is based on maintaining a stress rate during elastic region of a tensile test. However there has been confusion around Method A and how the strain rate is measured whether it can be done using a closed loop method or a crosshead separation. As such ISO 6892-1:2016 includes additional separation of methods, introducing Method A1 (Closed- Loop Strain Control) and Method A2 (Constant Crosshead Separation Rate).


ISO 6892-1 can test metallic sheets and plates, wire, bar or section, rebar, and tubes. Specimens are gripped securely ensuring axial alignment for minimal bending and the specimen is strained in tension until failure using either Method A or Method B control modes. During this time, the load, crosshead extension, time, and strain data are recorded to determine the material characteristics.


As Method A is the


recommended method of control, the goal is that this further clarifi cation will assist with test labs that are transitioning from Method B towards Method A and monitoring the specimen strain rate.


Benefi ts of ISO 6892-1:2016 • Method A can help minimize the variation of the test rates during the moment when strain-


SI, the business


standards company has revised ISO 6892-1:2016 Metallic materials.


rate sensitive parameters are determined and minimize the measurement uncertainty of the test results


• Allows more repeatable and comparable results to be produced


• When utilising Method A1, there can be considerable time savings


• Makes recommendations for computer controlled testing machines


Dan Palmer Head of Manufacturing at BSI said: “Materials testing is a very important aspect of safety and material strength and can mean the success or failure of a product. This is particularly important in structural engineering where the calculations must be accurate for building solid and safe constructions. Alternatively the aerospace industry also demands rigorous measurement for metallic components used in aeronautical engineering. Therefore having a standard in place that adds confi dence to the process, is essential.” ISO 6892-1 enables designers


and engineers of metallic products and components, specifi ers and the insurance industry to defi ne the mechanical properties of metallic materials at room temperature. It can also be a useful reference for major fabrication contracts between manufacturers and customers. ISO 6892-1 was developed using


a consensus-based collaborative approach with input from experts from the materials, special metals testing and quality management industries. Such organizations as British Civil Engineering Manufacturers Association, GAMBICA Association Limited, National Physical Laboratory(NPL), UKAS (United Kingdom Accreditation Service) and University of Warwick contributed to the process.


About BSI BSI (British Standards Institution) is the business standards company that equips businesses with the necessary solutions to turn standards of best practice into habits of excellence. Formed in 1901, BSI was the world’s first National Standards Body and a founding member of the International Organization for Standardization (ISO). Over a century later it continues to facilitate business improvement across the globe by helping its clients drive performance, manage risk and grow sustainably through the adoption of international management systems standards, many of which BSI originated. Renowned for its


marks of excellence including the consumer recognized BSI Kitemark™, BSI’s influence spans multiple sectors including aerospace, automotive, built environment, food, healthcare and ICT. With over 80,000 clients in 182 countries, BSI is an organization whose standards inspire excellence across the globe.


To learn more, please visit www.bsigroup.com Media enquiries:


Matt Clemens /James Ralph Naomi Prior


Good Relations BSI Tel: +44 20 7861 2083 Tel: +44 20 8996 6330


Email: bsi@goodrelations.co.uk Email: pressoffi ce@bsigroup.com


As sophisticated as your tube processing.


www.tube-processing-machines.com The best machine technology.


www.internationalmetaltube.com IMT September 2016 9


Hall 11 Booth E02


Page 1  |  Page 2  |  Page 3  |  Page 4  |  Page 5  |  Page 6  |  Page 7  |  Page 8  |  Page 9  |  Page 10  |  Page 11  |  Page 12  |  Page 13  |  Page 14  |  Page 15  |  Page 16  |  Page 17  |  Page 18  |  Page 19  |  Page 20  |  Page 21  |  Page 22  |  Page 23  |  Page 24  |  Page 25  |  Page 26  |  Page 27  |  Page 28  |  Page 29  |  Page 30  |  Page 31  |  Page 32  |  Page 33  |  Page 34  |  Page 35  |  Page 36  |  Page 37  |  Page 38  |  Page 39  |  Page 40