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.
Số hiệu tiêu chuẩn
ISO 4545
Tên tiêu chuẩn
Metallic materials; hardness test; Knoop test
Ngày phát hành
1993-04-00
Tiêu chuẩn tương đương
GB/T 18449.1 (2001), NEQ * JIS Z 2251 (1998-02-20), MOD * TS ISO 4545 (2002-12-18), IDT * CSN ISO 4545 (1995-11-01), IDT
Tiêu chuẩn liên quan
ISO 4546 (1993-04) * ISO 10250
Thay thế cho
ISO/DIS 4545 (1989-10)
Thay thế bằng
ISO 4545-1 (2005-11)
Từ khóa
Hardness measurement * Knoop * Knoop hardness * Metallic materials * Metals * Testing
ISO 4545
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