GME-60252-1976.pdf
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1、- STD-OPEL GME bO252-ENGL 177b I8597LL8 0027372 818 W The Determination of Indentation Hardness by Means of a Durometer (Shore A and D) TEST METHOD PR FVERFAHREN GME 60 252 Date/Datum , Syrn/Posl Description/Beschreibung Approved/Genehmigt . r VVauxhall Motors LTD Engineering Materials Laboratory Da
2、te of Issue 1 Ausgabedatum 3/T6 issue Ausgabe 4ppdlGen Adam Opel AG PEK Werkctoffentwicklung Page 1 of 11 Seite von Prepared Ausgefertigt c STDDOPEL LHE b0252-ENGL L77b 8 8597338 0027373 754 TEST METHOD PRFVERFAHREN GME 60 252 1 . 2. 3. 3.1 -4.2 3 -3 4. 4.1 4.2 4 03 This test method is similar t o t
3、hose described in: A S T M D 2240 - 68 BS 2719 - 56 DIN 53505 Is0 Recomemiation R 868 - 1968 Scope The object of this test method is the rapid determination of the indentation m e s s of elastomers, and thermoplastics where applicable. Preferably, this test method should be restricted t o quality co
4、ntrol purposes only. The Shore A scale should be used for the measurement within the range of 30 to approximately 95 Shore A, and Type D for hardnesses of above approximately 90 Shore A. if more accurate hardness results are required for elastomers, e.g. for arbitration purposes, the ball indentatio
5、n hardness (IRHD) shoiid be deter- mined in accordance with GME 60 256. Definitions Indentation hardness is the resistance of a material t o the penetration of an indentor of specified shape and Size under a specified applied force. The hardness scale runs from O to 100. O indicates zero hardness an
6、d 100 indicates infinite hardness. Test Methods Two methods are available for determining the indentation hardness of hkastomers and thermoplastics by means of a $urometer. Hand held instrument This method is used for components having curved or divergent surfaces, or from which suitable test pieces
7、 cannot be obtained. - - - - - - - - - - - Instrument used with a stand This method can only be used w i t h test pieces having flat parallel surfaces. - - - - - - - - - - - - - - - The use of the hand held instrument is restricted to quality control porpose Where the use of a durometer is unavoidab
8、le for the checking of initial samples, a suitable stand m u s t be used. Test Pieces The test surfaces shall be smooth, The test piece thickness shall be 6 m m , m i n i m . Thinner material may b laminated t o achieve this thickness, provided each layer is not less than 2 mm thick, and not more th
9、an 3 layers are used. A i r trapping between layers must be avoided. The test area should be such that at least 3 readingaaan be obtained. The readings should be made at Points a t least 5 mm apart, and at least 12 IIPII from any edge. Prepared Ausgefertigt Date of Issue Aucgabedatum Issue Ausgabe C
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