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Posted On Mar 25, 2014

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4-Point Bend Testing of Carbon Fiber

Carbon fiber is an extremely strong material. Depending on the manufacturing process, this textile can have typical modulus values of about 138 Gpa and ultimate tensile strengths of about 3.5 Gpa. Industry professionals can find themselves seeking to replace traditional steel components with lighter carbon fiber counterparts to achieve a much higher stiffness to weight ratio. To determine the appropriate thickness for the corresponding carbon component, one must undergo some experimental validation.

Posted On Mar 17, 2014

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Changes Pipe & Tube Manufacturers and Suppliers Should Know

David Fry, Global Metals Market Manager, highlights recent changes in the market and what challenges should be anticipated.

Posted On Mar 07, 2014

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Charpy Impact Testing: Minimizing Hammer Changes

A common misconception within metals Charpy testing is that the specimen being tested must have an impact energy between 10% and 80% of the hammer capacity to be a standard compliant test. This is not true for metals tested to current common international standards such as ISO 148 and ASTM E23. This misconception sometimes comes from confusion with plastics standards (see ISO 179-1), other older metals standards (see GOST 9454-78), and historical use of a low resolution dial indicator on metals pendulum systems. Due to these misunderstandings, labs often have multiple systems or hammers for testing a range of specimen energies.