>> P.347
Ⅳ-45RockwellVickershardnessBrinellhardnessRockwellhardnessShorehardnessCscalehardnessStandardballTungstenCarbideballAscaleBscaleLoad1471NLoad588.4NLoad980.7NHRCHVDiamondcircularconeDiameter1/16inballHS68940――85.6―9767900――85.0―9566865――84.5―9265832―(739)83.9―9164800―(722)83.4―8863772―(705)82.8―8762746―(688)82.3―8561720―(670)81.8―8360697―(654)81.2―8159674―(634)80.7―8058653―61580.1―7857633―59579.6―7656613―57779.0―7555595―56078.5―7454577―54378.0―7253560―52577.4―7152544(500)51276.8―6951528(487)49676.3―6850513(475)48175.9―6749498(464)46975.2―664848445145574.7―644747144244374.1―634645843243273.6―624544642142173.1―604443440940972.5―584342340040072.0―574241239039071.5―564140238138170.9―554039237137170.4―543938236236269.9―52●HardnessConversionTable(Reference)Statements
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