ISO 4545:1993

Metallic materials — Hardness test — Knoop test

Publication date:   Mar 18, 1993

95.99 Withdrawal of Standard   Nov 17, 2005

General information

95.99 Withdrawal of Standard   Nov 17, 2005

ISO

ISO/TC 164/SC 3 Hardness testing

International Standard

77.040.10   Mechanical testing of metals

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Scope

Specifies the method of Knoop hardness test covering test forces up to and including 9,807 N. The principle of the method is forcing a diamond indenter, in the form of a rhombic-based pyramid with specified angles between opposite faces at the vertex, into the surface of a test piece and measuring the long diagonal of the indentation left in the surface after removal of the test force. The Knoop hardness is proportional to the quotient obtained by dividing the test force by the projected area of the indentation.

Life cycle

NOW

WITHDRAWN
ISO 4545:1993
95.99 Withdrawal of Standard
Nov 17, 2005

REVISED BY

WITHDRAWN
ISO 4545-1:2005