This standard mainly specifies the Brinell hardness test method for metallic materials. However, the upper limit of the applicable hardness is 650HB W.
JIS Z 2243:2008 Referenced Document
ISO 4498-1 Sintered metal materials, excluding hardmetals; determination of apparent hardness; part 1: materials of essentially uniform section hardness
JIS B 7724 Brinell hardness test -- Verification and calibration of testing machines*, 2017-08-21 Update