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AS 1816.1-2007 pdf free download

AS 1816.1-2007 pdf free download.Metallic materials-Brinell hardness test Method 1 : Test method ( ISo 6506-1 : 2005 , MOD ).
This part of ISO 6506 specifies the method for the Brinell hardness test for metallic materials and is applicable up to the limit of 650 HBW.
For specific materials and/or products, particular International Standards exist (i.e. ISO 4498-1).
2 Normative references
The following referenced documents are indispensable for the application of this document. For dated references, only the edition cited applies. For undated references, the latest edition of the referenced document (including any amendments) applies.
ISO 4498-1, Sintered metal materials, excluding hardmetals — Determination of apparent hardness — Part 1:
Materials of essentially uniform section hardness
ISO 6506-2:2005, Metallic materials — Brinell hardness test — Pail 2: Verification and calibration of testing machines
ISO 6506-4, Metallic materials — Brinell hardness test — Part 4: Table of hardness values
3 Principle
An indenter (hardmetal ball with diameter D) is forced into the surface of a test piece and, after removal of the force F, the diameter of the indentation d left in the surface is measured.
The Bnnell hardness is proportional to the quotient obtained by dividing the test force by the curved surface area of the indentation. The indentation is assumed to retain the shape of the ball, and its surface area is calculated from the mean indentation diameter and the ball diameter.
5 Apparatus
5.1 Testing machine, capable of applying a predetermined test force or forces within the range of 9,807 N to 29.42 kN, in accordance with ISO 6506-2.
5.2 Indenter, a polished hardmetal ball, as specified in ISO 6506-2.
5.3 MeasurIng device, as specified in ISO 6506-2.
NOTE A suggested procedure for periodic checks by the user is given in Annex A.
6 Test piece
6.1 The test shall be carried out on a surface which is smooth and even, free from oxide scale, foreign matter and, in particular, free from lubricants The test piece shall have a surface finish that will allow an accurate measurement of the diameter of the indentation.
6.2 Preparation shall be carried out in such a way that any alteration of the surface, for example, due to excessive heating or cold-working, is minimized.
6.3 The thickness of the test piece shall be at least eight times the depth of indentation. Values for the minimum thickness of the test piece in relation to the mean diameter of indentation are given in Annex B.
Visible deformation at the back of the test piece can indicate that the test piece is too thin.AS 1816.1-2007 pdf free download.

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