Large variation in Charpy impact test results
Large variation in Charpy impact test results
(OP)
Without going into detail, is it normal for a high tensile steel (over 80,000 psi) to have a large variation of charpy impact test results of, ie - 10 to 120 ft-lbs?





RE: Large variation in Charpy impact test results
RE: Large variation in Charpy impact test results
Of course, there are exceptions to the above because of heat treatment effects. However, since you did not get into any detail, the above post is a general observation.
RE: Large variation in Charpy impact test results
Steve Jones
Materials & Corrosion Engineer
http://www.pdo.co.om/pdo/
RE: Large variation in Charpy impact test results
RE: Large variation in Charpy impact test results
With stronger materials slight differences in the machining of the bars can also have a big effect.
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Corrosion never sleeps, but it can be managed.
http://www.trenttube.com/Trent/tech_form.htm
RE: Large variation in Charpy impact test results
RE: Large variation in Charpy impact test results
It almost sounds like what a steel mill might quote when pressed for what CVN values they would expect with hot rolled product. As mentioned above, even within a lot, depending on chemistry and heat treatment (as well as test temperature), the CVN results can vary widely. Of course, this is why these variables are closely controlled for applications where the CVN values are critical.