From early forms of scratch testing to sophisticated automated imaging, hardness testing has evolved into an efficient, accurate, and valued material test method.Īs the 20th century progressed and endured two world wars, with the simultaneous blossoming of the industrial revolution, increased manufacturing requirements and global industrialization brought an urgent demand for more refined and efficient test methods and new techniques began to develop. Over the years, various methods for determining the hardness of materials have been developed and employed at varying levels of success. Determining these material properties provides valuable insight to the durability, strength, flexibility, and capabilities of a variety of component types from raw materials to prepared specimens, and finished goods. How important and useful is material and hardness testing? Consider the information provided and its significance in structural, aerospace, automotive, quality control, failure analysis and many other forms of manufacturing and industry. Certainly, as a material property, its value and importance cannot be understated, the information from a hardness test can complement and often be used in conjunction with other material verification techniques such as tensile or compression to provide critical performance information.
The result would be that your calibration exercise will not be reliable.Hardness, as applied to most materials, and in particular metals, is a valuable, revealing, and commonly employed mechanical test that has been in use in various forms for over 250 years. If the calibration is not current, it should be performed before using the calibrator for this calibration procedure otherwise you might just be calibrating your pressure gauge with a calibrator that is already out of calibration. Verify that the calibrator has been currently calibrated in accordance with manufacturer’s specifications. Here an outline is given on how a pressure gauge could be calibrated with any type of calibrator. The way a gauge is calibrated depends on the way the gauge is used. There is no standard way to calibrate a pressure gauge. A pressure gauge can be calibrated with a standard pneumatic calibrator, a dead weight tester or any other suitable calibrator. In the plant, pressure gauge calibration is often taken for granted probably because they seem to be everywhere in the plant that one just assumes that some how the gauges are accurate even when they are out of calibration.
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