Tensile testing is a simple and inexpensive procedure that is routinely used in industry to quantify the mechanical properties of materials (ASTM 1997). In order to obtain reproducible and accurate results the use of appropriate testing methods that are carried out using approved standard conditions is required. It is therefore very important to understand the relevant material properties requirement for a specific application and how the properties are obtained. Depending on the manufacturer's specifications, engineers must ascertain a material's suitability for a given application through acceptable tests procedures whenever materials are procured and before use.
#ASTM STANDARDS FOR TENSILE TESTING OF METALS ISO#
Keywords: TM380 mild steel, tensile properties, ISO 6892:2009, reproducibility.Īscertaining the reliability of materials in service is an important engineering practice for safe and efficient industrial operations. The micrographs reveal a pearlite and ferrite structure typical of mild steel, and the fractographs show a dimpled surface typical of ductile fracture, which is an attribute of mild steel. The specimen was found to be fairly homogeneous with minor sulphide inclusions. A chemical analysis was conducted to verify the specification by the manufacturer. This confirms that the current testing procedures require the use of long-range strain gauges or extensometer to determine the strain. The strain values calculated as per standard were in disagreement with those determined from extensometer and strain gauges and resulted in lower elastic modulus values. Thus it can be concluded that the tensile test procedure used resulted in accurate and reproducible results. The values of these parameters were found to be in agreement with the values supplied by the manufacturer's specification and showed minimal variations between laboratories. Parameters quantified included yield stress, ultimate tensile strength, and modulus of elasticity. Tensile tests were conducted on a dog-bone shaped TM380 mild steel specimen with strain gauges attached on either side, to monitor alignment and measure strain, using three different types of tensile testing machines. To achieve this objective, we reviewed the ISO 6892:2009 tensile testing standard along with reported good practice guidelines. The aim of this study was to develop an in-house tensile testing procedure that would yield accurate and reproducible parameters as input material properties into computational models for numerical simulations of the mechanical behaviour of TM380 mild steel. IIIDepartment of Chemical Engineering and Metallurgical Engineering, Tshwane University of Technology, Tshwane (Pretoria) IITshwane University of Technology, Tshwane (Pretoria) IDefence Peace Safety and Security, CSIR, Pretoria Utilization of ISO 6892:2009 testing standard for determining tensile properties of TM380 mild steel
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