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Post by chrisperoni on Aug 21, 2010 23:57:11 GMT
here's some info on hardness from Chris at Ronin (he was advising me about the truth of my swords): "No chance the hardness is 60. 1045 and 1060 steels max out under that, so even if the blades were made from 1060 they would still only be in the low to mid 50's at best. Differentially hardened 1095 comes in at 58-62." -I'm sure someone here will be able to gived a more comprehensive list of hardness max outs for differents steels. early in this thread it was asked how HRC is determined: (lifted this from the web but it is correct, if not overly technical) The Rockwell hardness test method consists of indenting the test material with a diamond cone or hardened steel ball indenter. The indenter is forced into the test material under a preliminary minor load F0 (Fig. 1A) usually 10 kgf. When equilibrium has been reached, an indicating device, which follows the movements of the indenter and so responds to changes in depth of penetration of the indenter is set to a datum position. While the preliminary minor load is still applied an additional major load is applied with resulting increase in penetration (Fig. 1B). When equilibrium has again been reach, the additional major load is removed but the preliminary minor load is still maintained. Removal of the additional major load allows a partial recovery, so reducing the depth of penetration (Fig. 1C). The permanent increase in depth of penetration, resulting from the application and removal of the additional major load is used to calculate the Rockwell hardness number.
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