ASTM B647-23 pdf free download – Standard Test Method For Indentation Hardness Of Aluminum Alloys By Means Of A Webster Hardness Gage.
This testing procedure is for assessing the indentation hardness of aluminum alloys using the Webster hardness gauge, specifically Model B.
Standard values are provided in the International System of Units (SI), which should be used as the norm. The figures in parentheses following the SI units are included for reference purposes only and do not constitute the standard values.
Note 1: While two additional models, A and B-75, are also in use, they are not included in the scope of this test method. Model A does not yield numerical hardness readings, and Model B-75 covers only a segment of the hardness range relevant to aluminum alloys.
3. Terminology
3.1 Definitions——The definitions of terms relating to hard-ness testing appearing in Terminology E6 shall be consideredas applying to the terms used in this test method.
4. Significance and Use
4.1 The Webster hardness gage is portable and thereforeuseful for in situ determination of the hardness of fabricatedparts and individual test specimens for production controlpurposes. It is not as sensitive as Rockwell or Brinell hardnessmachines; see 10.2.
4.2 This test method should be used only as cited inapplicable material specifications.
5. Apparatus (Fig.1)
5.1 The Webster hardness gage,Model B, consists of threemain parts: the frame, operating handle, and penetrator housingassembly.The penetrator housing assembly includes the prin-cipal working parts，including the penetrator，loading spring,adjusting nut， penetrator housing, housing key,return spring,and dial indicator.
ASTM B647-23 pdf free download – Standard Test Method For Indentation Hardness Of Aluminum Alloys By Means Of A Webster Hardness Gage
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