Leeb Rebound Hardness Tester, Pen Type
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$395.00
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The Leeb Rebound Hardness Test (LRHT) is one of the four most common methods for testing metal hardness. This is the only portable, non-destructive method for determining hardness and is commonly used on pieces larger than 1 Kg, although it may also be suitable for use on smaller pieces as well.
This particular model is very small (~6 inches long) and quite portable. It features an LCD display and on-board electronics to save up to 270 group measurements and can convert between many different hardness standards (HRA, HRB, HRC, HB, HV, HS). The internal battery can be charged via USB (5 VDC).
The D-type probe of this instrument is suitable for many different metals including steel, cast steel, tool steel alloys, stainless steel, cast iron, and cast aluminum alloys.
Relevant standards include:
A956 &#;Standard Test Method for Leeb Hardness Testing of Steel Products&#;
The kit includes:
This is why we test coating hardness, as this indicates how well it has cured &#; typically the harder the coating, the more complete the cure, and the better its overall performance.
One of the most common methods of determining coating hardness is the pencil hardness test, also known as the Wolff-Wilborn method, where a pencil of a known hardness is pushed across the coating at a specified angle, under a constant force. The pencil hardness is increased from B (soft), though HB (medium) to H (hard), until the coating is scratched. Alternatively, depending on the test method, you may start with the hardest pencil, and then decrease the pencil hardness until the coating isn&#;t scratched.
This rapid, inexpensive method is not only used by coating manufacturers during developmental work and as an indication of the coating&#;s performance; but also as a field test during post-application inspection.
The pencil hardness test can be completed free-hand using the Elcometer , which includes a set of 14 pencils (grades 6H to 6B), two specialised pencil sharpeners, and an abrasive paper block to prepare the pencil for testing. Alternatively, some Standards state you should use a specially designed tester, such as the Elcometer 501; which also includes a set of 14 pencils (again, 6H to 6B), the two specialised sharpeners and abrasive paper block, and a setting block of a predefined size for preparing the tester.
Remember, the scratch method is a destructive test and will damage the coating, so we recommend using test panels when testing using this method.
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If you are looking for more details, kindly visit Pen Hardness Tester.