MS ISO 6506-3:2003 Metallic materials - brinell hardness test - part 3: calibration of reference blocks (first revision) (ISO 6506-3:1999, idt)
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This part of ISO 6506 specifies a method for the calibration of reference blocks which are intended for use in the indirect verification of Brinell hardness testing machines as described in ISO 6506-2.